2005-04-29 16:23:29 +01:00
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2005-04-16 15:20:36 -07:00
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2005-11-03 16:00:25 +00:00
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2006-05-24 16:09:55 -05:00
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2005-04-16 15:20:36 -07:00
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2006-05-24 16:09:55 -05:00
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[PATCH] Filter rule comparators
Currently, audit only supports the "=" and "!=" operators in the -F
filter rules.
This patch reworks the support for "=" and "!=", and adds support
for ">", ">=", "<", and "<=".
This turned out to be a pretty clean, and simply process. I ended up
using the high order bits of the "field", as suggested by Steve and Amy.
This allowed for no changes whatsoever to the netlink communications.
See the documentation within the patch in the include/linux/audit.h
area, where there is a table that explains the reasoning of the bitmask
assignments clearly.
The patch adds a new function, audit_comparator(left, op, right).
This function will perform the specified comparison (op, which defaults
to "==" for backward compatibility) between two values (left and right).
If the negate bit is on, it will negate whatever that result was. This
value is returned.
Signed-off-by: Dustin Kirkland <dustin.kirkland@us.ibm.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2005-11-03 15:41:46 +00:00
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2005-11-03 16:00:25 +00:00
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2005-11-03 17:15:16 +00:00
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2005-04-16 15:20:36 -07:00
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2014-01-27 17:38:42 -05:00
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2005-04-16 15:20:36 -07:00
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2011-07-26 16:09:06 -07:00
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2005-11-03 16:00:25 +00:00
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2005-04-16 15:20:36 -07:00
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2011-05-23 14:51:41 -04:00
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 17:04:11 +09:00
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2005-05-21 00:15:52 +01:00
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2005-05-17 12:08:48 +01:00
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2006-05-24 16:09:55 -05:00
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2005-04-16 15:20:36 -07:00
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2005-06-24 14:14:05 +01:00
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2005-07-13 22:47:07 +01:00
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2005-04-16 15:20:36 -07:00
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2005-11-03 17:15:16 +00:00
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2005-12-15 18:33:52 +00:00
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2006-01-01 14:07:00 -05:00
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2006-04-26 14:04:08 -04:00
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2006-10-19 16:08:53 -04:00
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2006-05-06 08:22:52 -04:00
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2008-11-11 21:48:14 +11:00
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2009-03-29 19:50:06 -04:00
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2012-04-12 16:47:58 -05:00
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audit: Audit proc/<pid>/cmdline aka proctitle
During an audit event, cache and print the value of the process's
proctitle value (proc/<pid>/cmdline). This is useful in situations
where processes are started via fork'd virtual machines where the
comm field is incorrect. Often times, setting the comm field still
is insufficient as the comm width is not very wide and most
virtual machine "package names" do not fit. Also, during execution,
many threads have their comm field set as well. By tying it back to
the global cmdline value for the process, audit records will be more
complete in systems with these properties. An example of where this
is useful and applicable is in the realm of Android. With Android,
their is no fork/exec for VM instances. The bare, preloaded Dalvik
VM listens for a fork and specialize request. When this request comes
in, the VM forks, and the loads the specific application (specializing).
This was done to take advantage of COW and to not require a load of
basic packages by the VM on very app spawn. When this spawn occurs,
the package name is set via setproctitle() and shows up in procfs.
Many of these package names are longer then 16 bytes, the historical
width of task->comm. Having the cmdline in the audit records will
couple the application back to the record directly. Also, on my
Debian development box, some audit records were more useful then
what was printed under comm.
The cached proctitle is tied to the life-cycle of the audit_context
structure and is built on demand.
Proctitle is controllable by userspace, and thus should not be trusted.
It is meant as an aid to assist in debugging. The proctitle event is
emitted during syscall audits, and can be filtered with auditctl.
Example:
type=AVC msg=audit(1391217013.924:386): avc: denied { getattr } for pid=1971 comm="mkdir" name="/" dev="selinuxfs" ino=1 scontext=system_u:system_r:consolekit_t:s0-s0:c0.c255 tcontext=system_u:object_r:security_t:s0 tclass=filesystem
type=SYSCALL msg=audit(1391217013.924:386): arch=c000003e syscall=137 success=yes exit=0 a0=7f019dfc8bd7 a1=7fffa6aed2c0 a2=fffffffffff4bd25 a3=7fffa6aed050 items=0 ppid=1967 pid=1971 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="mkdir" exe="/bin/mkdir" subj=system_u:system_r:consolekit_t:s0-s0:c0.c255 key=(null)
type=UNKNOWN[1327] msg=audit(1391217013.924:386): proctitle=6D6B646972002D70002F7661722F72756E2F636F6E736F6C65
Acked-by: Steve Grubb <sgrubb@redhat.com> (wrt record formating)
Signed-off-by: William Roberts <wroberts@tresys.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
2014-02-11 10:12:01 -08:00
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2005-04-16 15:20:36 -07:00
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2005-12-15 18:33:52 +00:00
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2005-04-16 15:20:36 -07:00
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2012-01-03 14:23:06 -05:00
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2008-01-07 14:31:58 -05:00
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audit: Audit proc/<pid>/cmdline aka proctitle
During an audit event, cache and print the value of the process's
proctitle value (proc/<pid>/cmdline). This is useful in situations
where processes are started via fork'd virtual machines where the
comm field is incorrect. Often times, setting the comm field still
is insufficient as the comm width is not very wide and most
virtual machine "package names" do not fit. Also, during execution,
many threads have their comm field set as well. By tying it back to
the global cmdline value for the process, audit records will be more
complete in systems with these properties. An example of where this
is useful and applicable is in the realm of Android. With Android,
their is no fork/exec for VM instances. The bare, preloaded Dalvik
VM listens for a fork and specialize request. When this request comes
in, the VM forks, and the loads the specific application (specializing).
This was done to take advantage of COW and to not require a load of
basic packages by the VM on very app spawn. When this spawn occurs,
the package name is set via setproctitle() and shows up in procfs.
Many of these package names are longer then 16 bytes, the historical
width of task->comm. Having the cmdline in the audit records will
couple the application back to the record directly. Also, on my
Debian development box, some audit records were more useful then
what was printed under comm.
The cached proctitle is tied to the life-cycle of the audit_context
structure and is built on demand.
Proctitle is controllable by userspace, and thus should not be trusted.
It is meant as an aid to assist in debugging. The proctitle event is
emitted during syscall audits, and can be filtered with auditctl.
Example:
type=AVC msg=audit(1391217013.924:386): avc: denied { getattr } for pid=1971 comm="mkdir" name="/" dev="selinuxfs" ino=1 scontext=system_u:system_r:consolekit_t:s0-s0:c0.c255 tcontext=system_u:object_r:security_t:s0 tclass=filesystem
type=SYSCALL msg=audit(1391217013.924:386): arch=c000003e syscall=137 success=yes exit=0 a0=7f019dfc8bd7 a1=7fffa6aed2c0 a2=fffffffffff4bd25 a3=7fffa6aed050 items=0 ppid=1967 pid=1971 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="mkdir" exe="/bin/mkdir" subj=system_u:system_r:consolekit_t:s0-s0:c0.c255 key=(null)
type=UNKNOWN[1327] msg=audit(1391217013.924:386): proctitle=6D6B646972002D70002F7661722F72756E2F636F6E736F6C65
Acked-by: Steve Grubb <sgrubb@redhat.com> (wrt record formating)
Signed-off-by: William Roberts <wroberts@tresys.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
2014-02-11 10:12:01 -08:00
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2006-07-10 08:29:24 -04:00
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2007-03-29 18:01:04 -04:00
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2005-04-16 15:20:36 -07:00
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2007-03-29 18:01:04 -04:00
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2012-09-10 22:39:43 -07:00
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2012-02-07 16:53:48 -08:00
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2008-01-08 10:06:53 -05:00
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2007-03-29 18:01:04 -04:00
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2008-01-07 13:40:17 -05:00
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2007-03-29 18:01:04 -04:00
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2008-11-11 21:48:18 +11:00
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[PATCH] audit: watching subtrees
New kind of audit rule predicates: "object is visible in given subtree".
The part that can be sanely implemented, that is. Limitations:
* if you have hardlink from outside of tree, you'd better watch
it too (or just watch the object itself, obviously)
* if you mount something under a watched tree, tell audit
that new chunk should be added to watched subtrees
* if you umount something in a watched tree and it's still mounted
elsewhere, you will get matches on events happening there. New command
tells audit to recalculate the trees, trimming such sources of false
positives.
Note that it's _not_ about path - if something mounted in several places
(multiple mount, bindings, different namespaces, etc.), the match does
_not_ depend on which one we are using for access.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2007-07-22 08:04:18 -04:00
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2006-08-31 19:26:40 -04:00
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2008-08-18 09:45:51 -07:00
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2008-08-02 10:56:37 +08:00
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2008-08-18 09:45:51 -07:00
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2008-10-13 10:40:53 +01:00
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2006-08-31 19:26:40 -04:00
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2012-01-03 14:23:05 -05:00
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2008-04-28 04:15:49 -04:00
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2012-01-03 14:23:05 -05:00
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2012-01-03 14:23:05 -05:00
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2008-08-02 10:56:37 +08:00
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2012-01-03 14:23:05 -05:00
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2012-01-03 14:23:05 -05:00
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2012-01-03 14:23:05 -05:00
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2012-01-03 14:23:05 -05:00
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2008-04-28 04:15:49 -04:00
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[PATCH] audit: watching subtrees
New kind of audit rule predicates: "object is visible in given subtree".
The part that can be sanely implemented, that is. Limitations:
* if you have hardlink from outside of tree, you'd better watch
it too (or just watch the object itself, obviously)
* if you mount something under a watched tree, tell audit
that new chunk should be added to watched subtrees
* if you umount something in a watched tree and it's still mounted
elsewhere, you will get matches on events happening there. New command
tells audit to recalculate the trees, trimming such sources of false
positives.
Note that it's _not_ about path - if something mounted in several places
(multiple mount, bindings, different namespaces, etc.), the match does
_not_ depend on which one we are using for access.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2007-07-22 08:04:18 -04:00
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2009-01-26 18:09:45 -05:00
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[PATCH] audit: watching subtrees
New kind of audit rule predicates: "object is visible in given subtree".
The part that can be sanely implemented, that is. Limitations:
* if you have hardlink from outside of tree, you'd better watch
it too (or just watch the object itself, obviously)
* if you mount something under a watched tree, tell audit
that new chunk should be added to watched subtrees
* if you umount something in a watched tree and it's still mounted
elsewhere, you will get matches on events happening there. New command
tells audit to recalculate the trees, trimming such sources of false
positives.
Note that it's _not_ about path - if something mounted in several places
(multiple mount, bindings, different namespaces, etc.), the match does
_not_ depend on which one we are using for access.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2007-07-22 08:04:18 -04:00
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2012-09-11 02:18:08 -07:00
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2012-01-03 14:23:08 -05:00
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2012-09-11 02:18:08 -07:00
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2012-01-03 14:23:08 -05:00
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2012-09-11 02:18:08 -07:00
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2012-01-03 14:23:08 -05:00
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2012-09-11 02:18:08 -07:00
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2012-01-03 14:23:08 -05:00
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2012-09-11 02:18:08 -07:00
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2012-01-03 14:23:08 -05:00
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2012-09-11 02:18:08 -07:00
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2012-01-03 14:23:08 -05:00
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2012-01-03 14:23:08 -05:00
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2011-12-13 16:17:51 -08:00
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2012-01-03 14:23:08 -05:00
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2012-09-11 02:18:08 -07:00
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2012-01-03 14:23:08 -05:00
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2012-09-11 02:18:08 -07:00
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2011-12-13 16:17:51 -08:00
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2012-09-11 02:18:08 -07:00
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2011-12-13 16:17:51 -08:00
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2012-09-11 02:18:08 -07:00
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2011-12-13 16:17:51 -08:00
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2012-09-11 02:18:08 -07:00
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2011-12-13 16:17:51 -08:00
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2012-09-11 02:18:08 -07:00
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2011-12-13 16:17:51 -08:00
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2012-09-11 02:18:08 -07:00
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2011-12-13 16:17:51 -08:00
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2012-09-11 02:18:08 -07:00
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2011-12-13 16:17:51 -08:00
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2012-09-11 02:18:08 -07:00
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2012-01-04 15:24:31 -05:00
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2012-09-11 02:18:08 -07:00
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2012-01-04 15:24:31 -05:00
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2012-09-11 02:18:08 -07:00
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2012-01-04 15:24:31 -05:00
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2012-09-11 02:18:08 -07:00
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2012-01-04 15:24:31 -05:00
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2012-09-11 02:18:08 -07:00
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2012-01-04 15:24:31 -05:00
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2012-09-11 02:18:08 -07:00
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2012-01-04 15:24:31 -05:00
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2012-09-11 02:18:08 -07:00
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2012-01-04 15:24:31 -05:00
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2012-09-11 02:18:08 -07:00
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2012-01-04 15:24:31 -05:00
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2012-09-11 02:18:08 -07:00
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2012-01-04 15:24:31 -05:00
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2012-09-11 02:18:08 -07:00
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2012-01-04 15:24:31 -05:00
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2012-09-11 02:18:08 -07:00
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2012-01-04 15:24:31 -05:00
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2012-09-11 02:18:08 -07:00
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2012-01-04 15:24:31 -05:00
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2012-09-11 02:18:08 -07:00
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2012-01-04 15:24:31 -05:00
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2012-09-11 02:18:08 -07:00
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2012-01-04 15:24:31 -05:00
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2012-09-11 02:18:08 -07:00
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2012-01-04 15:24:31 -05:00
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2012-09-11 02:18:08 -07:00
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2012-01-04 15:24:31 -05:00
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2012-09-11 02:18:08 -07:00
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2012-01-03 14:23:08 -05:00
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[PATCH] audit: path-based rules
In this implementation, audit registers inotify watches on the parent
directories of paths specified in audit rules. When audit's inotify
event handler is called, it updates any affected rules based on the
filesystem event. If the parent directory is renamed, removed, or its
filesystem is unmounted, audit removes all rules referencing that
inotify watch.
To keep things simple, this implementation limits location-based
auditing to the directory entries in an existing directory. Given
a path-based rule for /foo/bar/passwd, the following table applies:
passwd modified -- audit event logged
passwd replaced -- audit event logged, rules list updated
bar renamed -- rule removed
foo renamed -- untracked, meaning that the rule now applies to
the new location
Audit users typically want to have many rules referencing filesystem
objects, which can significantly impact filtering performance. This
patch also adds an inode-number-based rule hash to mitigate this
situation.
The patch is relative to the audit git tree:
http://kernel.org/git/?p=linux/kernel/git/viro/audit-current.git;a=summary
and uses the inotify kernel API:
http://lkml.org/lkml/2006/6/1/145
Signed-off-by: Amy Griffis <amy.griffis@hp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-04-07 16:55:56 -04:00
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2005-04-16 15:20:36 -07:00
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2011-04-27 15:10:49 +02:00
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2005-04-16 15:20:36 -07:00
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2006-02-07 12:05:27 -05:00
|
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2005-04-16 15:20:36 -07:00
|
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|
|
[PATCH] audit: path-based rules
In this implementation, audit registers inotify watches on the parent
directories of paths specified in audit rules. When audit's inotify
event handler is called, it updates any affected rules based on the
filesystem event. If the parent directory is renamed, removed, or its
filesystem is unmounted, audit removes all rules referencing that
inotify watch.
To keep things simple, this implementation limits location-based
auditing to the directory entries in an existing directory. Given
a path-based rule for /foo/bar/passwd, the following table applies:
passwd modified -- audit event logged
passwd replaced -- audit event logged, rules list updated
bar renamed -- rule removed
foo renamed -- untracked, meaning that the rule now applies to
the new location
Audit users typically want to have many rules referencing filesystem
objects, which can significantly impact filtering performance. This
patch also adds an inode-number-based rule hash to mitigate this
situation.
The patch is relative to the audit git tree:
http://kernel.org/git/?p=linux/kernel/git/viro/audit-current.git;a=summary
and uses the inotify kernel API:
http://lkml.org/lkml/2006/6/1/145
Signed-off-by: Amy Griffis <amy.griffis@hp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-04-07 16:55:56 -04:00
|
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|
2011-04-27 15:10:49 +02:00
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2005-04-16 15:20:36 -07:00
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2011-04-27 15:10:49 +02:00
|
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2012-01-03 14:23:05 -05:00
|
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2006-03-10 18:14:06 -06:00
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2011-04-27 15:10:49 +02:00
|
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2005-04-16 15:20:36 -07:00
|
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2006-02-07 12:05:27 -05:00
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2012-01-03 14:23:05 -05:00
|
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2005-04-16 15:20:36 -07:00
|
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2013-12-11 13:52:26 -05:00
|
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2005-04-16 15:20:36 -07:00
|
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2006-02-07 12:05:27 -05:00
|
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2005-04-16 15:20:36 -07:00
|
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|
2013-12-11 13:52:26 -05:00
|
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2005-04-16 15:20:36 -07:00
|
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2006-05-06 08:26:27 -04:00
|
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2006-09-29 00:08:50 -04:00
|
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2013-12-10 22:10:41 -05:00
|
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2006-05-06 08:26:27 -04:00
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2006-09-29 00:08:50 -04:00
|
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2006-05-06 08:26:27 -04:00
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2005-04-16 15:20:36 -07:00
|
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2012-09-11 02:18:08 -07:00
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2005-04-16 15:20:36 -07:00
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2012-09-11 02:18:08 -07:00
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2005-04-16 15:20:36 -07:00
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2012-09-11 02:18:08 -07:00
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2005-04-16 15:20:36 -07:00
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2012-09-11 02:18:08 -07:00
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2005-04-16 15:20:36 -07:00
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2012-09-11 02:18:08 -07:00
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2011-12-13 23:09:08 +03:00
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2005-04-16 15:20:36 -07:00
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2012-09-11 02:18:08 -07:00
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2011-12-13 23:09:08 +03:00
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2005-04-16 15:20:36 -07:00
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2012-09-11 02:18:08 -07:00
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2005-04-16 15:20:36 -07:00
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2012-09-11 02:18:08 -07:00
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2005-04-16 15:20:36 -07:00
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2006-02-07 12:05:27 -05:00
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2005-04-16 15:20:36 -07:00
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2005-04-29 16:08:28 +01:00
|
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2007-10-18 03:06:09 -07:00
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2006-02-07 12:05:27 -05:00
|
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2005-04-29 16:08:28 +01:00
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2005-04-16 15:20:36 -07:00
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2006-02-07 12:05:27 -05:00
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2005-04-16 15:20:36 -07:00
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2005-08-27 10:25:43 +01:00
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2006-02-07 12:05:27 -05:00
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2005-08-27 10:25:43 +01:00
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2006-02-07 12:05:27 -05:00
|
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2005-08-27 10:25:43 +01:00
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2005-04-16 15:20:36 -07:00
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2012-01-03 14:23:05 -05:00
|
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2012-01-03 14:23:05 -05:00
|
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2012-01-03 14:23:05 -05:00
|
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2005-04-16 15:20:36 -07:00
|
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2012-01-03 14:23:05 -05:00
|
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2012-01-03 14:23:05 -05:00
|
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2012-01-03 14:23:05 -05:00
|
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2005-04-16 15:20:36 -07:00
|
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|
|
[PATCH] audit: path-based rules
In this implementation, audit registers inotify watches on the parent
directories of paths specified in audit rules. When audit's inotify
event handler is called, it updates any affected rules based on the
filesystem event. If the parent directory is renamed, removed, or its
filesystem is unmounted, audit removes all rules referencing that
inotify watch.
To keep things simple, this implementation limits location-based
auditing to the directory entries in an existing directory. Given
a path-based rule for /foo/bar/passwd, the following table applies:
passwd modified -- audit event logged
passwd replaced -- audit event logged, rules list updated
bar renamed -- rule removed
foo renamed -- untracked, meaning that the rule now applies to
the new location
Audit users typically want to have many rules referencing filesystem
objects, which can significantly impact filtering performance. This
patch also adds an inode-number-based rule hash to mitigate this
situation.
The patch is relative to the audit git tree:
http://kernel.org/git/?p=linux/kernel/git/viro/audit-current.git;a=summary
and uses the inotify kernel API:
http://lkml.org/lkml/2006/6/1/145
Signed-off-by: Amy Griffis <amy.griffis@hp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-04-07 16:55:56 -04:00
|
|
|
|
2013-07-04 12:56:11 -04:00
|
|
|
|
[PATCH] audit: path-based rules
In this implementation, audit registers inotify watches on the parent
directories of paths specified in audit rules. When audit's inotify
event handler is called, it updates any affected rules based on the
filesystem event. If the parent directory is renamed, removed, or its
filesystem is unmounted, audit removes all rules referencing that
inotify watch.
To keep things simple, this implementation limits location-based
auditing to the directory entries in an existing directory. Given
a path-based rule for /foo/bar/passwd, the following table applies:
passwd modified -- audit event logged
passwd replaced -- audit event logged, rules list updated
bar renamed -- rule removed
foo renamed -- untracked, meaning that the rule now applies to
the new location
Audit users typically want to have many rules referencing filesystem
objects, which can significantly impact filtering performance. This
patch also adds an inode-number-based rule hash to mitigate this
situation.
The patch is relative to the audit git tree:
http://kernel.org/git/?p=linux/kernel/git/viro/audit-current.git;a=summary
and uses the inotify kernel API:
http://lkml.org/lkml/2006/6/1/145
Signed-off-by: Amy Griffis <amy.griffis@hp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-04-07 16:55:56 -04:00
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2012-01-03 14:23:05 -05:00
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2005-04-16 15:20:36 -07:00
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2012-01-03 14:23:07 -05:00
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2012-09-11 02:18:08 -07:00
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2012-01-03 14:23:07 -05:00
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2012-09-11 02:18:08 -07:00
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2012-01-03 14:23:07 -05:00
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2012-01-03 14:23:07 -05:00
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2012-09-11 02:18:08 -07:00
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2012-01-03 14:23:07 -05:00
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2012-09-11 02:18:08 -07:00
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2012-01-03 14:23:07 -05:00
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[PATCH] audit: path-based rules
In this implementation, audit registers inotify watches on the parent
directories of paths specified in audit rules. When audit's inotify
event handler is called, it updates any affected rules based on the
filesystem event. If the parent directory is renamed, removed, or its
filesystem is unmounted, audit removes all rules referencing that
inotify watch.
To keep things simple, this implementation limits location-based
auditing to the directory entries in an existing directory. Given
a path-based rule for /foo/bar/passwd, the following table applies:
passwd modified -- audit event logged
passwd replaced -- audit event logged, rules list updated
bar renamed -- rule removed
foo renamed -- untracked, meaning that the rule now applies to
the new location
Audit users typically want to have many rules referencing filesystem
objects, which can significantly impact filtering performance. This
patch also adds an inode-number-based rule hash to mitigate this
situation.
The patch is relative to the audit git tree:
http://kernel.org/git/?p=linux/kernel/git/viro/audit-current.git;a=summary
and uses the inotify kernel API:
http://lkml.org/lkml/2006/6/1/145
Signed-off-by: Amy Griffis <amy.griffis@hp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-04-07 16:55:56 -04:00
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2009-12-17 20:12:04 -05:00
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[PATCH] audit: path-based rules
In this implementation, audit registers inotify watches on the parent
directories of paths specified in audit rules. When audit's inotify
event handler is called, it updates any affected rules based on the
filesystem event. If the parent directory is renamed, removed, or its
filesystem is unmounted, audit removes all rules referencing that
inotify watch.
To keep things simple, this implementation limits location-based
auditing to the directory entries in an existing directory. Given
a path-based rule for /foo/bar/passwd, the following table applies:
passwd modified -- audit event logged
passwd replaced -- audit event logged, rules list updated
bar renamed -- rule removed
foo renamed -- untracked, meaning that the rule now applies to
the new location
Audit users typically want to have many rules referencing filesystem
objects, which can significantly impact filtering performance. This
patch also adds an inode-number-based rule hash to mitigate this
situation.
The patch is relative to the audit git tree:
http://kernel.org/git/?p=linux/kernel/git/viro/audit-current.git;a=summary
and uses the inotify kernel API:
http://lkml.org/lkml/2006/6/1/145
Signed-off-by: Amy Griffis <amy.griffis@hp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-04-07 16:55:56 -04:00
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[PATCH] audit: watching subtrees
New kind of audit rule predicates: "object is visible in given subtree".
The part that can be sanely implemented, that is. Limitations:
* if you have hardlink from outside of tree, you'd better watch
it too (or just watch the object itself, obviously)
* if you mount something under a watched tree, tell audit
that new chunk should be added to watched subtrees
* if you umount something in a watched tree and it's still mounted
elsewhere, you will get matches on events happening there. New command
tells audit to recalculate the trees, trimming such sources of false
positives.
Note that it's _not_ about path - if something mounted in several places
(multiple mount, bindings, different namespaces, etc.), the match does
_not_ depend on which one we are using for access.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2007-07-22 08:04:18 -04:00
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2005-04-16 15:20:36 -07:00
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2012-09-11 02:18:08 -07:00
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2005-04-16 15:20:36 -07:00
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2013-04-09 02:22:10 -07:00
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2006-06-29 16:56:39 -05:00
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2006-03-10 18:14:06 -06:00
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2008-04-19 09:59:43 +10:00
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2006-04-11 08:50:56 -04:00
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Audit: use new LSM hooks instead of SELinux exports
Stop using the following exported SELinux interfaces:
selinux_get_inode_sid(inode, sid)
selinux_get_ipc_sid(ipcp, sid)
selinux_get_task_sid(tsk, sid)
selinux_sid_to_string(sid, ctx, len)
kfree(ctx)
and use following generic LSM equivalents respectively:
security_inode_getsecid(inode, secid)
security_ipc_getsecid*(ipcp, secid)
security_task_getsecid(tsk, secid)
security_sid_to_secctx(sid, ctx, len)
security_release_secctx(ctx, len)
Call security_release_secctx only if security_secid_to_secctx
succeeded.
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Ahmed S. Darwish <darwish.07@gmail.com>
Acked-by: James Morris <jmorris@namei.org>
Reviewed-by: Paul Moore <paul.moore@hp.com>
2008-03-01 21:54:38 +02:00
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2006-04-11 08:50:56 -04:00
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2008-03-01 22:01:11 +02:00
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2006-03-10 18:14:06 -06:00
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2008-04-19 09:59:43 +10:00
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2006-03-10 18:14:06 -06:00
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2006-04-11 08:50:56 -04:00
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2006-03-10 18:14:06 -06:00
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2006-06-29 16:57:08 -05:00
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2008-04-19 09:59:43 +10:00
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2006-06-29 16:57:08 -05:00
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2008-03-01 22:01:11 +02:00
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2006-06-29 16:57:08 -05:00
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2008-04-19 09:59:43 +10:00
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2006-06-29 16:57:08 -05:00
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2012-01-03 14:23:05 -05:00
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2006-06-29 16:57:08 -05:00
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2008-12-10 03:40:06 -05:00
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2006-06-29 16:57:08 -05:00
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2005-04-16 15:20:36 -07:00
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2006-02-07 12:05:27 -05:00
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2005-04-16 15:20:36 -07:00
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2006-06-14 18:45:21 -04:00
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2006-08-31 19:26:40 -04:00
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2008-04-28 04:15:49 -04:00
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2012-01-03 14:23:08 -05:00
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2005-04-16 15:20:36 -07:00
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2011-04-27 15:10:49 +02:00
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2005-04-16 15:20:36 -07:00
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2008-12-14 23:45:27 -05:00
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2005-04-16 15:20:36 -07:00
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2008-12-16 03:51:22 -05:00
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2005-04-16 15:20:36 -07:00
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2005-06-19 19:35:50 +01:00
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2011-04-27 15:10:49 +02:00
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2008-12-16 03:51:22 -05:00
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2005-04-16 15:20:36 -07:00
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2014-05-28 23:09:58 -04:00
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2005-04-16 15:20:36 -07:00
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2005-05-13 18:35:15 +01:00
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2005-09-13 12:47:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-08-17 14:49:57 +01:00
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2005-04-16 15:20:36 -07:00
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2005-07-14 14:40:06 +01:00
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2005-06-20 16:07:33 +01:00
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2005-04-16 15:20:36 -07:00
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2005-08-17 14:49:57 +01:00
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[PATCH] Filter rule comparators
Currently, audit only supports the "=" and "!=" operators in the -F
filter rules.
This patch reworks the support for "=" and "!=", and adds support
for ">", ">=", "<", and "<=".
This turned out to be a pretty clean, and simply process. I ended up
using the high order bits of the "field", as suggested by Steve and Amy.
This allowed for no changes whatsoever to the netlink communications.
See the documentation within the patch in the include/linux/audit.h
area, where there is a table that explains the reasoning of the bitmask
assignments clearly.
The patch adds a new function, audit_comparator(left, op, right).
This function will perform the specified comparison (op, which defaults
to "==" for backward compatibility) between two values (left and right).
If the negate bit is on, it will negate whatever that result was. This
value is returned.
Signed-off-by: Dustin Kirkland <dustin.kirkland@us.ibm.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2005-11-03 15:41:46 +00:00
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|
2014-05-28 23:09:58 -04:00
|
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|
[PATCH] audit: path-based rules
In this implementation, audit registers inotify watches on the parent
directories of paths specified in audit rules. When audit's inotify
event handler is called, it updates any affected rules based on the
filesystem event. If the parent directory is renamed, removed, or its
filesystem is unmounted, audit removes all rules referencing that
inotify watch.
To keep things simple, this implementation limits location-based
auditing to the directory entries in an existing directory. Given
a path-based rule for /foo/bar/passwd, the following table applies:
passwd modified -- audit event logged
passwd replaced -- audit event logged, rules list updated
bar renamed -- rule removed
foo renamed -- untracked, meaning that the rule now applies to
the new location
Audit users typically want to have many rules referencing filesystem
objects, which can significantly impact filtering performance. This
patch also adds an inode-number-based rule hash to mitigate this
situation.
The patch is relative to the audit git tree:
http://kernel.org/git/?p=linux/kernel/git/viro/audit-current.git;a=summary
and uses the inotify kernel API:
http://lkml.org/lkml/2006/6/1/145
Signed-off-by: Amy Griffis <amy.griffis@hp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-04-07 16:55:56 -04:00
|
|
|
|
2011-04-27 15:10:49 +02:00
|
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|
|
[PATCH] audit: path-based rules
In this implementation, audit registers inotify watches on the parent
directories of paths specified in audit rules. When audit's inotify
event handler is called, it updates any affected rules based on the
filesystem event. If the parent directory is renamed, removed, or its
filesystem is unmounted, audit removes all rules referencing that
inotify watch.
To keep things simple, this implementation limits location-based
auditing to the directory entries in an existing directory. Given
a path-based rule for /foo/bar/passwd, the following table applies:
passwd modified -- audit event logged
passwd replaced -- audit event logged, rules list updated
bar renamed -- rule removed
foo renamed -- untracked, meaning that the rule now applies to
the new location
Audit users typically want to have many rules referencing filesystem
objects, which can significantly impact filtering performance. This
patch also adds an inode-number-based rule hash to mitigate this
situation.
The patch is relative to the audit git tree:
http://kernel.org/git/?p=linux/kernel/git/viro/audit-current.git;a=summary
and uses the inotify kernel API:
http://lkml.org/lkml/2006/6/1/145
Signed-off-by: Amy Griffis <amy.griffis@hp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-04-07 16:55:56 -04:00
|
|
|
|
2008-12-14 23:45:27 -05:00
|
|
|
|
[PATCH] audit: path-based rules
In this implementation, audit registers inotify watches on the parent
directories of paths specified in audit rules. When audit's inotify
event handler is called, it updates any affected rules based on the
filesystem event. If the parent directory is renamed, removed, or its
filesystem is unmounted, audit removes all rules referencing that
inotify watch.
To keep things simple, this implementation limits location-based
auditing to the directory entries in an existing directory. Given
a path-based rule for /foo/bar/passwd, the following table applies:
passwd modified -- audit event logged
passwd replaced -- audit event logged, rules list updated
bar renamed -- rule removed
foo renamed -- untracked, meaning that the rule now applies to
the new location
Audit users typically want to have many rules referencing filesystem
objects, which can significantly impact filtering performance. This
patch also adds an inode-number-based rule hash to mitigate this
situation.
The patch is relative to the audit git tree:
http://kernel.org/git/?p=linux/kernel/git/viro/audit-current.git;a=summary
and uses the inotify kernel API:
http://lkml.org/lkml/2006/6/1/145
Signed-off-by: Amy Griffis <amy.griffis@hp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-04-07 16:55:56 -04:00
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2012-01-03 14:23:05 -05:00
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2014-05-28 23:09:58 -04:00
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2012-01-03 14:23:05 -05:00
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[PATCH] audit: path-based rules
In this implementation, audit registers inotify watches on the parent
directories of paths specified in audit rules. When audit's inotify
event handler is called, it updates any affected rules based on the
filesystem event. If the parent directory is renamed, removed, or its
filesystem is unmounted, audit removes all rules referencing that
inotify watch.
To keep things simple, this implementation limits location-based
auditing to the directory entries in an existing directory. Given
a path-based rule for /foo/bar/passwd, the following table applies:
passwd modified -- audit event logged
passwd replaced -- audit event logged, rules list updated
bar renamed -- rule removed
foo renamed -- untracked, meaning that the rule now applies to
the new location
Audit users typically want to have many rules referencing filesystem
objects, which can significantly impact filtering performance. This
patch also adds an inode-number-based rule hash to mitigate this
situation.
The patch is relative to the audit git tree:
http://kernel.org/git/?p=linux/kernel/git/viro/audit-current.git;a=summary
and uses the inotify kernel API:
http://lkml.org/lkml/2006/6/1/145
Signed-off-by: Amy Griffis <amy.griffis@hp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-04-07 16:55:56 -04:00
|
|
|
|
2012-01-03 14:23:05 -05:00
|
|
|
|
[PATCH] audit: path-based rules
In this implementation, audit registers inotify watches on the parent
directories of paths specified in audit rules. When audit's inotify
event handler is called, it updates any affected rules based on the
filesystem event. If the parent directory is renamed, removed, or its
filesystem is unmounted, audit removes all rules referencing that
inotify watch.
To keep things simple, this implementation limits location-based
auditing to the directory entries in an existing directory. Given
a path-based rule for /foo/bar/passwd, the following table applies:
passwd modified -- audit event logged
passwd replaced -- audit event logged, rules list updated
bar renamed -- rule removed
foo renamed -- untracked, meaning that the rule now applies to
the new location
Audit users typically want to have many rules referencing filesystem
objects, which can significantly impact filtering performance. This
patch also adds an inode-number-based rule hash to mitigate this
situation.
The patch is relative to the audit git tree:
http://kernel.org/git/?p=linux/kernel/git/viro/audit-current.git;a=summary
and uses the inotify kernel API:
http://lkml.org/lkml/2006/6/1/145
Signed-off-by: Amy Griffis <amy.griffis@hp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-04-07 16:55:56 -04:00
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2008-12-14 23:45:27 -05:00
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[PATCH] audit: path-based rules
In this implementation, audit registers inotify watches on the parent
directories of paths specified in audit rules. When audit's inotify
event handler is called, it updates any affected rules based on the
filesystem event. If the parent directory is renamed, removed, or its
filesystem is unmounted, audit removes all rules referencing that
inotify watch.
To keep things simple, this implementation limits location-based
auditing to the directory entries in an existing directory. Given
a path-based rule for /foo/bar/passwd, the following table applies:
passwd modified -- audit event logged
passwd replaced -- audit event logged, rules list updated
bar renamed -- rule removed
foo renamed -- untracked, meaning that the rule now applies to
the new location
Audit users typically want to have many rules referencing filesystem
objects, which can significantly impact filtering performance. This
patch also adds an inode-number-based rule hash to mitigate this
situation.
The patch is relative to the audit git tree:
http://kernel.org/git/?p=linux/kernel/git/viro/audit-current.git;a=summary
and uses the inotify kernel API:
http://lkml.org/lkml/2006/6/1/145
Signed-off-by: Amy Griffis <amy.griffis@hp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-04-07 16:55:56 -04:00
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2012-01-03 14:23:05 -05:00
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[PATCH] audit: path-based rules
In this implementation, audit registers inotify watches on the parent
directories of paths specified in audit rules. When audit's inotify
event handler is called, it updates any affected rules based on the
filesystem event. If the parent directory is renamed, removed, or its
filesystem is unmounted, audit removes all rules referencing that
inotify watch.
To keep things simple, this implementation limits location-based
auditing to the directory entries in an existing directory. Given
a path-based rule for /foo/bar/passwd, the following table applies:
passwd modified -- audit event logged
passwd replaced -- audit event logged, rules list updated
bar renamed -- rule removed
foo renamed -- untracked, meaning that the rule now applies to
the new location
Audit users typically want to have many rules referencing filesystem
objects, which can significantly impact filtering performance. This
patch also adds an inode-number-based rule hash to mitigate this
situation.
The patch is relative to the audit git tree:
http://kernel.org/git/?p=linux/kernel/git/viro/audit-current.git;a=summary
and uses the inotify kernel API:
http://lkml.org/lkml/2006/6/1/145
Signed-off-by: Amy Griffis <amy.griffis@hp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-04-07 16:55:56 -04:00
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2008-12-14 23:45:27 -05:00
|
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|
|
[PATCH] audit: path-based rules
In this implementation, audit registers inotify watches on the parent
directories of paths specified in audit rules. When audit's inotify
event handler is called, it updates any affected rules based on the
filesystem event. If the parent directory is renamed, removed, or its
filesystem is unmounted, audit removes all rules referencing that
inotify watch.
To keep things simple, this implementation limits location-based
auditing to the directory entries in an existing directory. Given
a path-based rule for /foo/bar/passwd, the following table applies:
passwd modified -- audit event logged
passwd replaced -- audit event logged, rules list updated
bar renamed -- rule removed
foo renamed -- untracked, meaning that the rule now applies to
the new location
Audit users typically want to have many rules referencing filesystem
objects, which can significantly impact filtering performance. This
patch also adds an inode-number-based rule hash to mitigate this
situation.
The patch is relative to the audit git tree:
http://kernel.org/git/?p=linux/kernel/git/viro/audit-current.git;a=summary
and uses the inotify kernel API:
http://lkml.org/lkml/2006/6/1/145
Signed-off-by: Amy Griffis <amy.griffis@hp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-04-07 16:55:56 -04:00
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2012-01-03 14:23:05 -05:00
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2005-06-19 19:35:50 +01:00
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2014-02-18 15:29:43 -05:00
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2005-04-16 15:20:36 -07:00
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2009-04-01 15:47:27 -04:00
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2005-04-16 15:20:36 -07:00
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2012-01-03 14:23:06 -05:00
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2005-04-16 15:20:36 -07:00
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2008-01-07 13:34:51 -05:00
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2005-04-16 15:20:36 -07:00
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2008-12-14 23:45:27 -05:00
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2005-04-16 15:20:36 -07:00
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audit: Audit proc/<pid>/cmdline aka proctitle
During an audit event, cache and print the value of the process's
proctitle value (proc/<pid>/cmdline). This is useful in situations
where processes are started via fork'd virtual machines where the
comm field is incorrect. Often times, setting the comm field still
is insufficient as the comm width is not very wide and most
virtual machine "package names" do not fit. Also, during execution,
many threads have their comm field set as well. By tying it back to
the global cmdline value for the process, audit records will be more
complete in systems with these properties. An example of where this
is useful and applicable is in the realm of Android. With Android,
their is no fork/exec for VM instances. The bare, preloaded Dalvik
VM listens for a fork and specialize request. When this request comes
in, the VM forks, and the loads the specific application (specializing).
This was done to take advantage of COW and to not require a load of
basic packages by the VM on very app spawn. When this spawn occurs,
the package name is set via setproctitle() and shows up in procfs.
Many of these package names are longer then 16 bytes, the historical
width of task->comm. Having the cmdline in the audit records will
couple the application back to the record directly. Also, on my
Debian development box, some audit records were more useful then
what was printed under comm.
The cached proctitle is tied to the life-cycle of the audit_context
structure and is built on demand.
Proctitle is controllable by userspace, and thus should not be trusted.
It is meant as an aid to assist in debugging. The proctitle event is
emitted during syscall audits, and can be filtered with auditctl.
Example:
type=AVC msg=audit(1391217013.924:386): avc: denied { getattr } for pid=1971 comm="mkdir" name="/" dev="selinuxfs" ino=1 scontext=system_u:system_r:consolekit_t:s0-s0:c0.c255 tcontext=system_u:object_r:security_t:s0 tclass=filesystem
type=SYSCALL msg=audit(1391217013.924:386): arch=c000003e syscall=137 success=yes exit=0 a0=7f019dfc8bd7 a1=7fffa6aed2c0 a2=fffffffffff4bd25 a3=7fffa6aed050 items=0 ppid=1967 pid=1971 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="mkdir" exe="/bin/mkdir" subj=system_u:system_r:consolekit_t:s0-s0:c0.c255 key=(null)
type=UNKNOWN[1327] msg=audit(1391217013.924:386): proctitle=6D6B646972002D70002F7661722F72756E2F636F6E736F6C65
Acked-by: Steve Grubb <sgrubb@redhat.com> (wrt record formating)
Signed-off-by: William Roberts <wroberts@tresys.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
2014-02-11 10:12:01 -08:00
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2005-04-16 15:20:36 -07:00
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2012-01-03 14:23:05 -05:00
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2005-04-16 15:20:36 -07:00
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2008-12-14 23:45:27 -05:00
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2013-04-16 10:17:02 -04:00
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2014-01-27 17:38:42 -05:00
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2005-04-16 15:20:36 -07:00
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2012-01-03 14:23:05 -05:00
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2014-01-27 17:38:42 -05:00
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2005-11-03 17:15:16 +00:00
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2005-04-16 15:20:36 -07:00
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2012-01-03 14:23:05 -05:00
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2013-04-01 11:00:00 +04:00
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2012-01-03 14:23:05 -05:00
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2005-11-03 17:15:16 +00:00
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2005-04-16 15:20:36 -07:00
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2008-02-14 19:38:33 -08:00
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2005-04-16 15:20:36 -07:00
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2007-03-29 18:01:04 -04:00
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2005-04-16 15:20:36 -07:00
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2013-04-07 16:14:18 +06:00
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2005-04-16 15:20:36 -07:00
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2013-04-08 14:43:41 -07:00
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2009-06-24 00:02:38 -04:00
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2012-01-03 14:23:05 -05:00
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2005-04-16 15:20:36 -07:00
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2005-09-13 12:47:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-09-13 12:47:11 -07:00
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2005-04-16 15:20:36 -07:00
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2008-12-16 03:51:22 -05:00
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2005-04-16 15:20:36 -07:00
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2008-01-08 17:38:31 -05:00
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2005-04-16 15:20:36 -07:00
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2008-12-16 03:51:22 -05:00
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2013-09-15 19:11:09 +02:00
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2005-04-16 15:20:36 -07:00
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2013-09-15 19:11:09 +02:00
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2005-04-16 15:20:36 -07:00
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2008-12-16 03:51:22 -05:00
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2005-04-16 15:20:36 -07:00
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2008-12-16 03:51:22 -05:00
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2005-04-16 15:20:36 -07:00
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2012-10-20 15:07:18 -04:00
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audit: Audit proc/<pid>/cmdline aka proctitle
During an audit event, cache and print the value of the process's
proctitle value (proc/<pid>/cmdline). This is useful in situations
where processes are started via fork'd virtual machines where the
comm field is incorrect. Often times, setting the comm field still
is insufficient as the comm width is not very wide and most
virtual machine "package names" do not fit. Also, during execution,
many threads have their comm field set as well. By tying it back to
the global cmdline value for the process, audit records will be more
complete in systems with these properties. An example of where this
is useful and applicable is in the realm of Android. With Android,
their is no fork/exec for VM instances. The bare, preloaded Dalvik
VM listens for a fork and specialize request. When this request comes
in, the VM forks, and the loads the specific application (specializing).
This was done to take advantage of COW and to not require a load of
basic packages by the VM on very app spawn. When this spawn occurs,
the package name is set via setproctitle() and shows up in procfs.
Many of these package names are longer then 16 bytes, the historical
width of task->comm. Having the cmdline in the audit records will
couple the application back to the record directly. Also, on my
Debian development box, some audit records were more useful then
what was printed under comm.
The cached proctitle is tied to the life-cycle of the audit_context
structure and is built on demand.
Proctitle is controllable by userspace, and thus should not be trusted.
It is meant as an aid to assist in debugging. The proctitle event is
emitted during syscall audits, and can be filtered with auditctl.
Example:
type=AVC msg=audit(1391217013.924:386): avc: denied { getattr } for pid=1971 comm="mkdir" name="/" dev="selinuxfs" ino=1 scontext=system_u:system_r:consolekit_t:s0-s0:c0.c255 tcontext=system_u:object_r:security_t:s0 tclass=filesystem
type=SYSCALL msg=audit(1391217013.924:386): arch=c000003e syscall=137 success=yes exit=0 a0=7f019dfc8bd7 a1=7fffa6aed2c0 a2=fffffffffff4bd25 a3=7fffa6aed050 items=0 ppid=1967 pid=1971 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="mkdir" exe="/bin/mkdir" subj=system_u:system_r:consolekit_t:s0-s0:c0.c255 key=(null)
type=UNKNOWN[1327] msg=audit(1391217013.924:386): proctitle=6D6B646972002D70002F7661722F72756E2F636F6E736F6C65
Acked-by: Steve Grubb <sgrubb@redhat.com> (wrt record formating)
Signed-off-by: William Roberts <wroberts@tresys.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
2014-02-11 10:12:01 -08:00
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2012-10-20 15:07:18 -04:00
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2005-04-16 15:20:36 -07:00
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2007-03-29 18:01:04 -04:00
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2012-02-07 16:53:48 -08:00
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2008-01-08 10:06:53 -05:00
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2007-03-29 18:01:04 -04:00
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Audit: use new LSM hooks instead of SELinux exports
Stop using the following exported SELinux interfaces:
selinux_get_inode_sid(inode, sid)
selinux_get_ipc_sid(ipcp, sid)
selinux_get_task_sid(tsk, sid)
selinux_sid_to_string(sid, ctx, len)
kfree(ctx)
and use following generic LSM equivalents respectively:
security_inode_getsecid(inode, secid)
security_ipc_getsecid*(ipcp, secid)
security_task_getsecid(tsk, secid)
security_sid_to_secctx(sid, ctx, len)
security_release_secctx(ctx, len)
Call security_release_secctx only if security_secid_to_secctx
succeeded.
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Ahmed S. Darwish <darwish.07@gmail.com>
Acked-by: James Morris <jmorris@namei.org>
Reviewed-by: Paul Moore <paul.moore@hp.com>
2008-03-01 21:54:38 +02:00
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2007-03-29 18:01:04 -04:00
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2008-01-07 14:01:18 -05:00
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2007-03-29 18:01:04 -04:00
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2012-09-10 22:39:43 -07:00
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2012-02-07 16:53:48 -08:00
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2012-10-23 08:58:35 -04:00
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Audit: use new LSM hooks instead of SELinux exports
Stop using the following exported SELinux interfaces:
selinux_get_inode_sid(inode, sid)
selinux_get_ipc_sid(ipcp, sid)
selinux_get_task_sid(tsk, sid)
selinux_sid_to_string(sid, ctx, len)
kfree(ctx)
and use following generic LSM equivalents respectively:
security_inode_getsecid(inode, secid)
security_ipc_getsecid*(ipcp, secid)
security_task_getsecid(tsk, secid)
security_sid_to_secctx(sid, ctx, len)
security_release_secctx(ctx, len)
Call security_release_secctx only if security_secid_to_secctx
succeeded.
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Ahmed S. Darwish <darwish.07@gmail.com>
Acked-by: James Morris <jmorris@namei.org>
Reviewed-by: Paul Moore <paul.moore@hp.com>
2008-03-01 21:54:38 +02:00
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2008-01-07 13:40:17 -05:00
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2007-03-29 18:01:04 -04:00
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2008-01-07 14:31:58 -05:00
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2011-03-30 22:57:33 -03:00
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2008-01-07 14:31:58 -05:00
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2007-07-19 01:48:15 -07:00
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2008-01-07 14:31:58 -05:00
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2009-06-11 14:31:34 -04:00
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2008-01-07 14:31:58 -05:00
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2007-07-19 01:48:15 -07:00
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2008-01-07 14:31:58 -05:00
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2008-02-18 18:23:16 -05:00
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2008-01-07 14:31:58 -05:00
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2008-02-18 18:23:16 -05:00
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2008-01-07 14:31:58 -05:00
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2007-07-28 00:55:18 +02:00
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2008-01-07 14:31:58 -05:00
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2007-07-19 01:48:15 -07:00
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2008-01-07 14:31:58 -05:00
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2007-07-19 01:48:15 -07:00
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2008-01-07 14:31:58 -05:00
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2007-07-19 01:48:15 -07:00
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2008-02-18 18:23:16 -05:00
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2007-07-19 01:48:15 -07:00
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2008-01-07 14:31:58 -05:00
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2007-07-19 01:48:15 -07:00
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2008-01-07 14:31:58 -05:00
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2007-07-19 01:48:15 -07:00
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2008-01-07 14:31:58 -05:00
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2009-01-09 16:44:16 +01:00
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2008-01-07 14:31:58 -05:00
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2007-07-19 01:48:15 -07:00
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2008-01-07 14:31:58 -05:00
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2007-07-28 00:55:18 +02:00
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2007-07-19 01:48:15 -07:00
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2008-02-18 18:23:16 -05:00
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2007-07-19 01:48:15 -07:00
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2008-01-07 14:31:58 -05:00
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2009-01-09 16:44:16 +01:00
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2008-01-07 14:31:58 -05:00
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2008-04-18 10:12:59 -04:00
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2008-01-07 14:31:58 -05:00
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2009-06-11 14:31:37 -04:00
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2008-01-07 14:31:58 -05:00
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2013-10-30 17:56:13 -04:00
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2008-01-07 14:31:58 -05:00
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2011-12-20 18:39:41 -05:00
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2008-01-07 14:31:58 -05:00
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2007-07-19 01:48:15 -07:00
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2013-10-30 17:56:13 -04:00
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2007-07-19 01:48:15 -07:00
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2013-10-30 17:56:13 -04:00
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2008-01-07 14:31:58 -05:00
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2014-03-05 14:34:36 -08:00
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2008-01-07 14:31:58 -05:00
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2007-07-19 01:48:15 -07:00
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2008-01-07 14:31:58 -05:00
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2013-10-30 17:56:13 -04:00
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2008-01-07 14:31:58 -05:00
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2007-07-19 01:48:15 -07:00
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2008-12-10 03:40:06 -05:00
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2008-12-10 03:16:51 -05:00
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2008-12-10 03:40:06 -05:00
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2011-07-27 14:03:22 -04:00
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2012-02-07 16:53:48 -08:00
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2008-12-10 03:40:06 -05:00
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2008-12-10 03:47:15 -05:00
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2013-01-11 14:32:07 -08:00
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2008-12-10 03:47:15 -05:00
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2011-07-27 14:03:22 -04:00
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2008-12-10 03:47:15 -05:00
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2008-12-10 03:40:06 -05:00
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2008-12-14 04:02:26 -05:00
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2011-07-26 05:26:10 -04:00
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2008-12-14 04:02:26 -05:00
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2008-12-14 03:46:48 -05:00
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2008-12-10 07:16:12 -05:00
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2008-12-10 06:58:59 -05:00
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2009-01-04 14:52:57 -05:00
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2010-10-30 02:54:44 -04:00
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2013-10-30 17:56:13 -04:00
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2008-12-10 03:16:51 -05:00
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audit: Audit proc/<pid>/cmdline aka proctitle
During an audit event, cache and print the value of the process's
proctitle value (proc/<pid>/cmdline). This is useful in situations
where processes are started via fork'd virtual machines where the
comm field is incorrect. Often times, setting the comm field still
is insufficient as the comm width is not very wide and most
virtual machine "package names" do not fit. Also, during execution,
many threads have their comm field set as well. By tying it back to
the global cmdline value for the process, audit records will be more
complete in systems with these properties. An example of where this
is useful and applicable is in the realm of Android. With Android,
their is no fork/exec for VM instances. The bare, preloaded Dalvik
VM listens for a fork and specialize request. When this request comes
in, the VM forks, and the loads the specific application (specializing).
This was done to take advantage of COW and to not require a load of
basic packages by the VM on very app spawn. When this spawn occurs,
the package name is set via setproctitle() and shows up in procfs.
Many of these package names are longer then 16 bytes, the historical
width of task->comm. Having the cmdline in the audit records will
couple the application back to the record directly. Also, on my
Debian development box, some audit records were more useful then
what was printed under comm.
The cached proctitle is tied to the life-cycle of the audit_context
structure and is built on demand.
Proctitle is controllable by userspace, and thus should not be trusted.
It is meant as an aid to assist in debugging. The proctitle event is
emitted during syscall audits, and can be filtered with auditctl.
Example:
type=AVC msg=audit(1391217013.924:386): avc: denied { getattr } for pid=1971 comm="mkdir" name="/" dev="selinuxfs" ino=1 scontext=system_u:system_r:consolekit_t:s0-s0:c0.c255 tcontext=system_u:object_r:security_t:s0 tclass=filesystem
type=SYSCALL msg=audit(1391217013.924:386): arch=c000003e syscall=137 success=yes exit=0 a0=7f019dfc8bd7 a1=7fffa6aed2c0 a2=fffffffffff4bd25 a3=7fffa6aed050 items=0 ppid=1967 pid=1971 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="mkdir" exe="/bin/mkdir" subj=system_u:system_r:consolekit_t:s0-s0:c0.c255 key=(null)
type=UNKNOWN[1327] msg=audit(1391217013.924:386): proctitle=6D6B646972002D70002F7661722F72756E2F636F6E736F6C65
Acked-by: Steve Grubb <sgrubb@redhat.com> (wrt record formating)
Signed-off-by: William Roberts <wroberts@tresys.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
2014-02-11 10:12:01 -08:00
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2006-03-29 20:17:10 -05:00
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2005-04-16 15:20:36 -07:00
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2006-03-31 15:22:49 -05:00
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2005-04-16 15:20:36 -07:00
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2005-05-26 12:04:57 +01:00
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2012-01-03 14:23:05 -05:00
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2005-04-16 15:20:36 -07:00
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2006-03-29 20:17:10 -05:00
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2006-07-16 06:43:48 -04:00
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2006-03-29 20:17:10 -05:00
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2005-04-16 15:20:36 -07:00
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2005-05-23 21:35:28 +01:00
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2005-04-16 15:20:36 -07:00
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2007-10-18 03:06:09 -07:00
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2005-04-29 16:08:28 +01:00
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2006-09-29 02:01:41 -07:00
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2005-04-16 15:20:36 -07:00
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2012-06-14 10:04:35 -07:00
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2006-09-29 02:01:41 -07:00
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2006-03-29 20:17:10 -05:00
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2009-06-11 14:31:37 -04:00
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2005-04-16 15:20:36 -07:00
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2005-05-26 12:04:57 +01:00
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2005-05-13 18:17:42 +01:00
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2006-03-29 20:17:10 -05:00
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2005-04-16 15:20:36 -07:00
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2006-05-24 16:09:55 -05:00
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2008-11-11 21:48:18 +11:00
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2005-04-16 15:20:36 -07:00
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2008-12-10 03:16:51 -05:00
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2008-12-10 03:40:06 -05:00
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2008-12-10 03:16:51 -05:00
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2008-12-14 04:57:47 -05:00
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2008-12-09 19:50:34 -05:00
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2007-03-29 18:01:04 -04:00
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2008-01-07 13:40:17 -05:00
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2008-01-08 10:06:53 -05:00
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2008-01-07 13:40:17 -05:00
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2007-03-29 18:01:04 -04:00
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2007-03-20 13:58:35 -04:00
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2007-03-29 18:01:04 -04:00
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2008-01-07 13:40:17 -05:00
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2008-01-08 10:06:53 -05:00
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2008-01-07 13:40:17 -05:00
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2007-03-29 18:01:04 -04:00
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2008-02-14 19:38:33 -08:00
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2006-03-29 20:17:10 -05:00
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2005-05-27 12:17:28 +01:00
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2012-01-06 14:07:10 -08:00
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2005-05-27 12:17:28 +01:00
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2005-11-03 16:00:25 +00:00
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2012-01-03 14:23:05 -05:00
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2013-07-08 15:59:36 -07:00
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2013-04-30 15:30:32 -04:00
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2013-07-08 15:59:36 -07:00
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2008-01-07 13:49:15 -05:00
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audit: Audit proc/<pid>/cmdline aka proctitle
During an audit event, cache and print the value of the process's
proctitle value (proc/<pid>/cmdline). This is useful in situations
where processes are started via fork'd virtual machines where the
comm field is incorrect. Often times, setting the comm field still
is insufficient as the comm width is not very wide and most
virtual machine "package names" do not fit. Also, during execution,
many threads have their comm field set as well. By tying it back to
the global cmdline value for the process, audit records will be more
complete in systems with these properties. An example of where this
is useful and applicable is in the realm of Android. With Android,
their is no fork/exec for VM instances. The bare, preloaded Dalvik
VM listens for a fork and specialize request. When this request comes
in, the VM forks, and the loads the specific application (specializing).
This was done to take advantage of COW and to not require a load of
basic packages by the VM on very app spawn. When this spawn occurs,
the package name is set via setproctitle() and shows up in procfs.
Many of these package names are longer then 16 bytes, the historical
width of task->comm. Having the cmdline in the audit records will
couple the application back to the record directly. Also, on my
Debian development box, some audit records were more useful then
what was printed under comm.
The cached proctitle is tied to the life-cycle of the audit_context
structure and is built on demand.
Proctitle is controllable by userspace, and thus should not be trusted.
It is meant as an aid to assist in debugging. The proctitle event is
emitted during syscall audits, and can be filtered with auditctl.
Example:
type=AVC msg=audit(1391217013.924:386): avc: denied { getattr } for pid=1971 comm="mkdir" name="/" dev="selinuxfs" ino=1 scontext=system_u:system_r:consolekit_t:s0-s0:c0.c255 tcontext=system_u:object_r:security_t:s0 tclass=filesystem
type=SYSCALL msg=audit(1391217013.924:386): arch=c000003e syscall=137 success=yes exit=0 a0=7f019dfc8bd7 a1=7fffa6aed2c0 a2=fffffffffff4bd25 a3=7fffa6aed050 items=0 ppid=1967 pid=1971 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="mkdir" exe="/bin/mkdir" subj=system_u:system_r:consolekit_t:s0-s0:c0.c255 key=(null)
type=UNKNOWN[1327] msg=audit(1391217013.924:386): proctitle=6D6B646972002D70002F7661722F72756E2F636F6E736F6C65
Acked-by: Steve Grubb <sgrubb@redhat.com> (wrt record formating)
Signed-off-by: William Roberts <wroberts@tresys.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
2014-02-11 10:12:01 -08:00
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2008-01-07 13:49:15 -05:00
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2006-03-31 15:22:49 -05:00
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2005-04-16 15:20:36 -07:00
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2005-09-13 12:47:11 -07:00
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2006-03-29 20:30:19 -05:00
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2005-09-13 12:47:11 -07:00
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2012-01-03 14:23:07 -05:00
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2005-04-16 15:20:36 -07:00
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2014-02-18 15:29:43 -05:00
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2012-01-03 14:23:06 -05:00
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2005-04-16 15:20:36 -07:00
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2007-10-18 03:06:09 -07:00
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2005-07-13 22:47:07 +01:00
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2006-03-29 20:17:10 -05:00
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2008-12-14 23:45:27 -05:00
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2006-03-29 20:17:10 -05:00
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2009-06-24 00:02:38 -04:00
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2005-04-16 15:20:36 -07:00
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2005-09-13 12:47:11 -07:00
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2005-04-16 15:20:36 -07:00
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2005-09-13 12:47:11 -07:00
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2012-01-03 14:23:06 -05:00
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2005-04-16 15:20:36 -07:00
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2006-03-29 20:23:36 -05:00
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2005-04-16 15:20:36 -07:00
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2012-01-03 14:23:06 -05:00
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2008-06-23 15:37:04 -07:00
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2005-04-16 15:20:36 -07:00
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2005-04-29 16:08:28 +01:00
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2005-04-16 15:20:36 -07:00
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2006-08-03 10:59:26 -04:00
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2008-12-14 23:45:27 -05:00
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2005-06-19 19:35:50 +01:00
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2008-12-14 23:45:27 -05:00
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2012-01-03 14:23:06 -05:00
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2005-04-16 15:20:36 -07:00
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2005-07-18 14:24:46 -04:00
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2005-04-16 15:20:36 -07:00
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2008-12-14 23:45:27 -05:00
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2006-09-29 00:08:50 -04:00
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2005-04-16 15:20:36 -07:00
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2005-09-13 12:47:11 -07:00
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2012-01-21 11:02:24 -08:00
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2005-09-13 12:47:11 -07:00
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2005-04-16 15:20:36 -07:00
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2012-01-21 11:02:24 -08:00
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2005-04-16 15:20:36 -07:00
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2005-09-13 12:47:11 -07:00
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2012-01-03 14:23:06 -05:00
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2005-04-16 15:20:36 -07:00
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2006-03-29 20:23:36 -05:00
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2005-04-16 15:20:36 -07:00
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2012-01-03 14:23:06 -05:00
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2005-04-16 15:20:36 -07:00
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2014-02-18 15:29:43 -05:00
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2012-01-03 14:23:06 -05:00
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2006-03-29 20:26:24 -05:00
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2005-04-16 15:20:36 -07:00
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2008-12-14 23:45:27 -05:00
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2006-03-29 20:17:10 -05:00
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2005-04-16 15:20:36 -07:00
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2008-12-14 23:45:27 -05:00
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2005-04-29 16:08:28 +01:00
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2009-06-24 00:02:38 -04:00
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2012-10-20 15:07:18 -04:00
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2005-04-16 15:20:36 -07:00
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2012-10-20 15:07:18 -04:00
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2005-04-16 15:20:36 -07:00
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[PATCH] audit: watching subtrees
New kind of audit rule predicates: "object is visible in given subtree".
The part that can be sanely implemented, that is. Limitations:
* if you have hardlink from outside of tree, you'd better watch
it too (or just watch the object itself, obviously)
* if you mount something under a watched tree, tell audit
that new chunk should be added to watched subtrees
* if you umount something in a watched tree and it's still mounted
elsewhere, you will get matches on events happening there. New command
tells audit to recalculate the trees, trimming such sources of false
positives.
Note that it's _not_ about path - if something mounted in several places
(multiple mount, bindings, different namespaces, etc.), the match does
_not_ depend on which one we are using for access.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2007-07-22 08:04:18 -04:00
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|
2009-12-17 21:24:24 -05:00
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|
|
|
[PATCH] audit: watching subtrees
New kind of audit rule predicates: "object is visible in given subtree".
The part that can be sanely implemented, that is. Limitations:
* if you have hardlink from outside of tree, you'd better watch
it too (or just watch the object itself, obviously)
* if you mount something under a watched tree, tell audit
that new chunk should be added to watched subtrees
* if you umount something in a watched tree and it's still mounted
elsewhere, you will get matches on events happening there. New command
tells audit to recalculate the trees, trimming such sources of false
positives.
Note that it's _not_ about path - if something mounted in several places
(multiple mount, bindings, different namespaces, etc.), the match does
_not_ depend on which one we are using for access.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2007-07-22 08:04:18 -04:00
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|
2014-01-27 17:38:42 -05:00
|
|
|
|
[PATCH] audit: watching subtrees
New kind of audit rule predicates: "object is visible in given subtree".
The part that can be sanely implemented, that is. Limitations:
* if you have hardlink from outside of tree, you'd better watch
it too (or just watch the object itself, obviously)
* if you mount something under a watched tree, tell audit
that new chunk should be added to watched subtrees
* if you umount something in a watched tree and it's still mounted
elsewhere, you will get matches on events happening there. New command
tells audit to recalculate the trees, trimming such sources of false
positives.
Note that it's _not_ about path - if something mounted in several places
(multiple mount, bindings, different namespaces, etc.), the match does
_not_ depend on which one we are using for access.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2007-07-22 08:04:18 -04:00
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2009-12-17 21:24:24 -05:00
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|
|
[PATCH] audit: watching subtrees
New kind of audit rule predicates: "object is visible in given subtree".
The part that can be sanely implemented, that is. Limitations:
* if you have hardlink from outside of tree, you'd better watch
it too (or just watch the object itself, obviously)
* if you mount something under a watched tree, tell audit
that new chunk should be added to watched subtrees
* if you umount something in a watched tree and it's still mounted
elsewhere, you will get matches on events happening there. New command
tells audit to recalculate the trees, trimming such sources of false
positives.
Note that it's _not_ about path - if something mounted in several places
(multiple mount, bindings, different namespaces, etc.), the match does
_not_ depend on which one we are using for access.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2007-07-22 08:04:18 -04:00
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2014-01-27 17:38:42 -05:00
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|
|
[PATCH] audit: watching subtrees
New kind of audit rule predicates: "object is visible in given subtree".
The part that can be sanely implemented, that is. Limitations:
* if you have hardlink from outside of tree, you'd better watch
it too (or just watch the object itself, obviously)
* if you mount something under a watched tree, tell audit
that new chunk should be added to watched subtrees
* if you umount something in a watched tree and it's still mounted
elsewhere, you will get matches on events happening there. New command
tells audit to recalculate the trees, trimming such sources of false
positives.
Note that it's _not_ about path - if something mounted in several places
(multiple mount, bindings, different namespaces, etc.), the match does
_not_ depend on which one we are using for access.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2007-07-22 08:04:18 -04:00
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2012-10-10 15:25:22 -04:00
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2012-01-03 14:23:05 -05:00
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2012-10-10 15:25:22 -04:00
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2012-01-03 14:23:05 -05:00
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2012-10-10 15:25:28 -04:00
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2005-09-13 12:47:11 -07:00
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2012-10-10 15:25:28 -04:00
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2005-04-16 15:20:36 -07:00
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2012-01-03 14:23:05 -05:00
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2005-04-16 15:20:36 -07:00
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2014-01-27 17:38:42 -05:00
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2005-04-16 15:20:36 -07:00
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2012-01-03 14:23:05 -05:00
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2012-10-10 15:25:28 -04:00
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2012-10-10 15:25:22 -04:00
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2012-01-03 14:23:05 -05:00
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2012-10-10 16:43:13 -04:00
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2012-01-03 14:23:05 -05:00
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2010-08-10 11:41:36 +02:00
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2005-04-16 15:20:36 -07:00
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2005-09-13 12:47:11 -07:00
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2012-10-10 15:25:28 -04:00
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2005-04-16 15:20:36 -07:00
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2014-02-05 12:54:53 -08:00
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2005-04-16 15:20:36 -07:00
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2014-01-27 17:38:42 -05:00
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2005-04-16 15:20:36 -07:00
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2012-01-03 14:23:05 -05:00
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2013-04-16 10:17:02 -04:00
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2012-01-03 14:23:05 -05:00
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2014-01-27 17:38:42 -05:00
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2012-01-03 14:23:05 -05:00
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2005-04-16 15:20:36 -07:00
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2013-04-01 11:00:00 +04:00
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2005-04-16 15:20:36 -07:00
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2014-01-27 17:38:42 -05:00
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2005-04-16 15:20:36 -07:00
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2012-10-10 15:25:28 -04:00
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2005-04-16 15:20:36 -07:00
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2005-09-13 12:47:11 -07:00
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2012-10-10 15:25:23 -04:00
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2005-09-13 12:47:11 -07:00
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2007-10-21 20:59:53 -07:00
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2013-07-08 15:59:36 -07:00
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2005-09-13 12:47:11 -07:00
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2012-10-10 16:43:13 -04:00
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2013-07-08 15:59:36 -07:00
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2005-04-16 15:20:36 -07:00
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[PATCH] audit: watching subtrees
New kind of audit rule predicates: "object is visible in given subtree".
The part that can be sanely implemented, that is. Limitations:
* if you have hardlink from outside of tree, you'd better watch
it too (or just watch the object itself, obviously)
* if you mount something under a watched tree, tell audit
that new chunk should be added to watched subtrees
* if you umount something in a watched tree and it's still mounted
elsewhere, you will get matches on events happening there. New command
tells audit to recalculate the trees, trimming such sources of false
positives.
Note that it's _not_ about path - if something mounted in several places
(multiple mount, bindings, different namespaces, etc.), the match does
_not_ depend on which one we are using for access.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2007-07-22 08:04:18 -04:00
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2012-01-03 14:23:05 -05:00
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2013-07-08 15:59:36 -07:00
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2005-04-16 15:20:36 -07:00
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2012-01-03 14:23:05 -05:00
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2012-10-10 15:25:21 -04:00
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2012-10-10 16:43:13 -04:00
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2012-01-03 14:23:05 -05:00
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2012-10-10 15:25:23 -04:00
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2012-10-10 16:43:13 -04:00
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2012-10-10 15:25:23 -04:00
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2005-04-16 15:20:36 -07:00
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2012-01-03 14:23:05 -05:00
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2012-10-10 15:25:21 -04:00
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2012-10-10 15:25:23 -04:00
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2012-10-10 15:25:22 -04:00
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2012-01-03 14:23:05 -05:00
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2012-10-10 15:25:23 -04:00
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2012-10-10 15:25:28 -04:00
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2012-10-10 15:25:23 -04:00
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2013-07-08 15:59:36 -07:00
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2012-10-10 15:25:23 -04:00
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|
[PATCH] audit: watching subtrees
New kind of audit rule predicates: "object is visible in given subtree".
The part that can be sanely implemented, that is. Limitations:
* if you have hardlink from outside of tree, you'd better watch
it too (or just watch the object itself, obviously)
* if you mount something under a watched tree, tell audit
that new chunk should be added to watched subtrees
* if you umount something in a watched tree and it's still mounted
elsewhere, you will get matches on events happening there. New command
tells audit to recalculate the trees, trimming such sources of false
positives.
Note that it's _not_ about path - if something mounted in several places
(multiple mount, bindings, different namespaces, etc.), the match does
_not_ depend on which one we are using for access.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2007-07-22 08:04:18 -04:00
|
|
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|
2012-01-03 14:23:05 -05:00
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2005-11-03 16:00:25 +00:00
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2012-10-10 15:25:21 -04:00
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2006-07-13 13:16:39 -04:00
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2012-10-10 15:25:21 -04:00
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2012-10-10 15:25:25 -04:00
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2005-11-03 16:00:25 +00:00
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2012-10-10 15:25:21 -04:00
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2012-10-10 15:25:25 -04:00
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2005-11-03 16:00:25 +00:00
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2007-06-07 12:19:32 -04:00
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2009-12-25 05:07:33 -05:00
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2012-10-10 15:25:25 -04:00
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2005-11-03 16:00:25 +00:00
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[PATCH] audit: watching subtrees
New kind of audit rule predicates: "object is visible in given subtree".
The part that can be sanely implemented, that is. Limitations:
* if you have hardlink from outside of tree, you'd better watch
it too (or just watch the object itself, obviously)
* if you mount something under a watched tree, tell audit
that new chunk should be added to watched subtrees
* if you umount something in a watched tree and it's still mounted
elsewhere, you will get matches on events happening there. New command
tells audit to recalculate the trees, trimming such sources of false
positives.
Note that it's _not_ about path - if something mounted in several places
(multiple mount, bindings, different namespaces, etc.), the match does
_not_ depend on which one we are using for access.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2007-07-22 08:04:18 -04:00
|
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2005-11-03 16:00:25 +00:00
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2012-10-10 15:25:25 -04:00
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2012-01-03 14:23:05 -05:00
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2012-10-10 15:25:25 -04:00
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2007-02-13 14:15:22 -05:00
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2012-10-10 15:25:28 -04:00
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2012-10-10 15:25:25 -04:00
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|
[PATCH] audit: path-based rules
In this implementation, audit registers inotify watches on the parent
directories of paths specified in audit rules. When audit's inotify
event handler is called, it updates any affected rules based on the
filesystem event. If the parent directory is renamed, removed, or its
filesystem is unmounted, audit removes all rules referencing that
inotify watch.
To keep things simple, this implementation limits location-based
auditing to the directory entries in an existing directory. Given
a path-based rule for /foo/bar/passwd, the following table applies:
passwd modified -- audit event logged
passwd replaced -- audit event logged, rules list updated
bar renamed -- rule removed
foo renamed -- untracked, meaning that the rule now applies to
the new location
Audit users typically want to have many rules referencing filesystem
objects, which can significantly impact filtering performance. This
patch also adds an inode-number-based rule hash to mitigate this
situation.
The patch is relative to the audit git tree:
http://kernel.org/git/?p=linux/kernel/git/viro/audit-current.git;a=summary
and uses the inotify kernel API:
http://lkml.org/lkml/2006/6/1/145
Signed-off-by: Amy Griffis <amy.griffis@hp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-04-07 16:55:56 -04:00
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2007-02-13 14:15:22 -05:00
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2005-11-03 16:00:25 +00:00
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2012-10-10 15:25:25 -04:00
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2012-01-03 14:23:05 -05:00
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2012-10-10 15:25:25 -04:00
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2007-02-13 14:15:22 -05:00
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2012-10-10 15:25:28 -04:00
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2012-10-10 15:25:25 -04:00
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2012-10-10 15:25:25 -04:00
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2012-10-10 15:25:25 -04:00
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2007-02-13 14:15:22 -05:00
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2006-09-28 14:31:32 -04:00
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2007-02-13 14:15:22 -05:00
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2012-10-10 15:25:25 -04:00
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2012-01-03 14:23:05 -05:00
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2006-09-28 14:31:32 -04:00
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2012-01-03 14:23:05 -05:00
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2006-07-13 13:16:39 -04:00
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2007-02-13 14:15:22 -05:00
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2012-10-10 15:25:25 -04:00
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2007-02-13 14:15:22 -05:00
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2012-10-10 15:25:25 -04:00
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2007-02-13 14:15:22 -05:00
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2012-10-10 15:25:25 -04:00
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2007-02-13 14:15:22 -05:00
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2012-10-10 15:25:25 -04:00
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2006-07-13 13:16:02 -04:00
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2007-06-07 22:44:34 -04:00
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2006-07-13 13:16:02 -04:00
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2005-09-13 12:47:11 -07:00
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2008-12-06 01:05:50 -05:00
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2005-05-21 21:08:09 +01:00
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2005-04-16 15:20:36 -07:00
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2008-12-06 01:05:50 -05:00
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2005-07-18 14:24:46 -04:00
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2005-05-21 21:08:09 +01:00
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2008-12-14 23:45:27 -05:00
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2008-12-06 01:05:50 -05:00
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2005-04-16 15:20:36 -07:00
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2008-01-08 10:06:53 -05:00
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2013-05-24 08:58:31 -04:00
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2013-05-23 14:26:00 -04:00
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2013-05-24 09:39:29 -04:00
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2013-05-24 09:18:04 -04:00
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2013-05-24 09:39:29 -04:00
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2013-05-24 08:58:31 -04:00
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2013-12-11 15:28:09 -05:00
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2013-05-24 08:58:31 -04:00
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2013-11-01 19:34:45 +08:00
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2013-05-24 08:58:31 -04:00
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2013-12-11 15:28:09 -05:00
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2013-05-24 08:58:31 -04:00
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2011-01-19 19:22:35 -05:00
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2013-05-24 08:58:31 -04:00
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2005-09-13 12:47:11 -07:00
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2012-01-03 14:23:08 -05:00
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2005-09-13 12:47:11 -07:00
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2012-09-10 22:39:43 -07:00
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2005-04-16 15:20:36 -07:00
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2012-01-03 14:23:08 -05:00
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2013-11-06 10:47:17 -05:00
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2013-05-24 08:58:31 -04:00
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2006-06-12 07:48:28 -04:00
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2013-05-24 08:58:31 -04:00
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2012-01-03 14:23:08 -05:00
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2013-05-24 09:49:14 -04:00
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2013-11-27 17:35:17 -05:00
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2008-01-10 04:53:18 -05:00
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2008-01-08 10:06:53 -05:00
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2008-01-10 04:53:18 -05:00
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2013-05-24 08:58:31 -04:00
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2005-04-16 15:20:36 -07:00
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2006-05-24 16:09:55 -05:00
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2009-01-05 13:41:13 -08:00
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2006-05-24 16:09:55 -05:00
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2011-07-26 05:26:10 -04:00
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2006-05-24 16:09:55 -05:00
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2008-12-14 04:02:26 -05:00
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2006-05-24 16:09:55 -05:00
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2008-12-14 04:02:26 -05:00
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2006-05-24 16:09:55 -05:00
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2008-12-14 04:02:26 -05:00
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2006-05-24 16:09:55 -05:00
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2008-12-14 03:46:48 -05:00
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2006-05-24 16:09:55 -05:00
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2008-12-14 03:46:48 -05:00
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2006-05-24 16:09:55 -05:00
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2008-12-14 03:46:48 -05:00
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2006-05-24 16:09:55 -05:00
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2008-12-14 03:46:48 -05:00
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2006-05-24 16:09:55 -05:00
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2008-12-14 03:46:48 -05:00
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2006-05-24 16:09:55 -05:00
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2008-12-14 03:46:48 -05:00
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2006-05-24 16:09:55 -05:00
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2008-12-14 03:46:48 -05:00
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2006-05-24 16:09:55 -05:00
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2009-01-05 13:41:13 -08:00
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2006-05-24 16:09:55 -05:00
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2008-12-10 07:16:12 -05:00
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2006-05-24 16:09:55 -05:00
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2008-12-10 07:16:12 -05:00
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2006-05-24 16:09:55 -05:00
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2008-12-10 07:16:12 -05:00
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2006-05-24 16:09:55 -05:00
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2008-12-10 06:58:59 -05:00
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2006-05-24 16:09:55 -05:00
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2008-12-10 06:58:59 -05:00
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2006-05-24 16:09:55 -05:00
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2005-09-13 12:47:11 -07:00
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2006-04-02 17:07:33 -04:00
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2008-12-10 03:40:06 -05:00
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2006-04-02 17:07:33 -04:00
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2008-12-10 03:40:06 -05:00
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2008-12-10 03:47:15 -05:00
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2008-12-10 03:40:06 -05:00
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2006-04-02 17:07:33 -04:00
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2005-09-13 12:47:11 -07:00
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2008-12-10 03:47:15 -05:00
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2005-09-13 12:47:11 -07:00
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2011-07-27 14:03:22 -04:00
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2005-04-16 15:20:36 -07:00
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2008-12-10 03:47:15 -05:00
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2005-04-16 15:20:36 -07:00
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2005-05-06 12:38:39 +01:00
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2013-10-30 17:56:13 -04:00
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2006-04-26 14:04:08 -04:00
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2013-10-30 17:56:13 -04:00
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2006-04-26 14:04:08 -04:00
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2005-09-13 12:47:11 -07:00
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2013-04-07 16:55:23 +08:00
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2005-09-13 12:47:11 -07:00
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2013-04-07 16:55:23 +08:00
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2005-05-17 12:08:48 +01:00
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2013-04-07 16:55:23 +08:00
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2008-12-10 03:16:51 -05:00
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2013-04-07 16:55:23 +08:00
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2005-05-17 12:08:48 +01:00
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2007-02-07 01:48:00 -05:00
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2008-12-14 04:57:47 -05:00
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2007-02-07 01:48:00 -05:00
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2008-12-14 04:57:47 -05:00
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2007-02-07 01:48:00 -05:00
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2005-09-13 12:47:11 -07:00
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2012-01-03 14:23:07 -05:00
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2005-05-17 12:08:48 +01:00
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2008-12-09 19:50:34 -05:00
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2005-05-17 12:08:48 +01:00
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2008-12-09 19:50:34 -05:00
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2005-05-17 12:08:48 +01:00
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2007-03-20 13:58:35 -04:00
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2013-12-11 13:52:26 -05:00
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2008-01-07 13:40:17 -05:00
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2008-11-14 10:39:19 +11:00
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2008-01-08 10:06:53 -05:00
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Audit: use new LSM hooks instead of SELinux exports
Stop using the following exported SELinux interfaces:
selinux_get_inode_sid(inode, sid)
selinux_get_ipc_sid(ipcp, sid)
selinux_get_task_sid(tsk, sid)
selinux_sid_to_string(sid, ctx, len)
kfree(ctx)
and use following generic LSM equivalents respectively:
security_inode_getsecid(inode, secid)
security_ipc_getsecid*(ipcp, secid)
security_task_getsecid(tsk, secid)
security_sid_to_secctx(sid, ctx, len)
security_release_secctx(ctx, len)
Call security_release_secctx only if security_secid_to_secctx
succeeded.
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Ahmed S. Darwish <darwish.07@gmail.com>
Acked-by: James Morris <jmorris@namei.org>
Reviewed-by: Paul Moore <paul.moore@hp.com>
2008-03-01 21:54:38 +02:00
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2008-01-07 13:40:17 -05:00
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2007-03-20 13:58:35 -04:00
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2005-09-13 12:47:11 -07:00
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2007-03-29 18:01:04 -04:00
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2005-05-06 12:38:39 +01:00
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2007-03-29 18:01:04 -04:00
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2012-02-07 16:53:48 -08:00
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2006-05-25 10:19:47 -04:00
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2007-08-08 00:01:46 +01:00
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2008-07-07 10:49:45 -04:00
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2013-12-11 13:52:26 -05:00
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2012-09-10 22:39:43 -07:00
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2008-01-10 04:53:18 -05:00
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2007-08-08 00:01:46 +01:00
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2008-11-14 10:39:19 +11:00
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Audit: use new LSM hooks instead of SELinux exports
Stop using the following exported SELinux interfaces:
selinux_get_inode_sid(inode, sid)
selinux_get_ipc_sid(ipcp, sid)
selinux_get_task_sid(tsk, sid)
selinux_sid_to_string(sid, ctx, len)
kfree(ctx)
and use following generic LSM equivalents respectively:
security_inode_getsecid(inode, secid)
security_ipc_getsecid*(ipcp, secid)
security_task_getsecid(tsk, secid)
security_sid_to_secctx(sid, ctx, len)
security_release_secctx(ctx, len)
Call security_release_secctx only if security_secid_to_secctx
succeeded.
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Ahmed S. Darwish <darwish.07@gmail.com>
Acked-by: James Morris <jmorris@namei.org>
Reviewed-by: Paul Moore <paul.moore@hp.com>
2008-03-01 21:54:38 +02:00
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2007-08-08 00:01:46 +01:00
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2005-05-06 12:38:39 +01:00
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2007-03-29 18:01:04 -04:00
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2013-12-11 13:52:26 -05:00
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2008-01-07 13:40:17 -05:00
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2008-11-14 10:39:19 +11:00
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2008-01-08 10:06:53 -05:00
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Audit: use new LSM hooks instead of SELinux exports
Stop using the following exported SELinux interfaces:
selinux_get_inode_sid(inode, sid)
selinux_get_ipc_sid(ipcp, sid)
selinux_get_task_sid(tsk, sid)
selinux_sid_to_string(sid, ctx, len)
kfree(ctx)
and use following generic LSM equivalents respectively:
security_inode_getsecid(inode, secid)
security_ipc_getsecid*(ipcp, secid)
security_task_getsecid(tsk, secid)
security_sid_to_secctx(sid, ctx, len)
security_release_secctx(ctx, len)
Call security_release_secctx only if security_secid_to_secctx
succeeded.
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Ahmed S. Darwish <darwish.07@gmail.com>
Acked-by: James Morris <jmorris@namei.org>
Reviewed-by: Paul Moore <paul.moore@hp.com>
2008-03-01 21:54:38 +02:00
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2008-01-07 13:40:17 -05:00
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2007-03-29 18:01:04 -04:00
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2007-08-22 14:01:05 -07:00
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2007-03-29 18:01:04 -04:00
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2013-12-11 13:52:26 -05:00
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2008-01-07 13:40:17 -05:00
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2008-11-14 10:39:19 +11:00
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2008-01-08 10:06:53 -05:00
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Audit: use new LSM hooks instead of SELinux exports
Stop using the following exported SELinux interfaces:
selinux_get_inode_sid(inode, sid)
selinux_get_ipc_sid(ipcp, sid)
selinux_get_task_sid(tsk, sid)
selinux_sid_to_string(sid, ctx, len)
kfree(ctx)
and use following generic LSM equivalents respectively:
security_inode_getsecid(inode, secid)
security_ipc_getsecid*(ipcp, secid)
security_task_getsecid(tsk, secid)
security_sid_to_secctx(sid, ctx, len)
security_release_secctx(ctx, len)
Call security_release_secctx only if security_secid_to_secctx
succeeded.
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Ahmed S. Darwish <darwish.07@gmail.com>
Acked-by: James Morris <jmorris@namei.org>
Reviewed-by: Paul Moore <paul.moore@hp.com>
2008-03-01 21:54:38 +02:00
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2008-01-07 13:40:17 -05:00
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2007-03-29 18:01:04 -04:00
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2005-05-06 12:38:39 +01:00
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2007-04-19 10:28:21 -04:00
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2008-11-11 21:48:18 +11:00
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CRED: Inaugurate COW credentials
Inaugurate copy-on-write credentials management. This uses RCU to manage the
credentials pointer in the task_struct with respect to accesses by other tasks.
A process may only modify its own credentials, and so does not need locking to
access or modify its own credentials.
A mutex (cred_replace_mutex) is added to the task_struct to control the effect
of PTRACE_ATTACHED on credential calculations, particularly with respect to
execve().
With this patch, the contents of an active credentials struct may not be
changed directly; rather a new set of credentials must be prepared, modified
and committed using something like the following sequence of events:
struct cred *new = prepare_creds();
int ret = blah(new);
if (ret < 0) {
abort_creds(new);
return ret;
}
return commit_creds(new);
There are some exceptions to this rule: the keyrings pointed to by the active
credentials may be instantiated - keyrings violate the COW rule as managing
COW keyrings is tricky, given that it is possible for a task to directly alter
the keys in a keyring in use by another task.
To help enforce this, various pointers to sets of credentials, such as those in
the task_struct, are declared const. The purpose of this is compile-time
discouragement of altering credentials through those pointers. Once a set of
credentials has been made public through one of these pointers, it may not be
modified, except under special circumstances:
(1) Its reference count may incremented and decremented.
(2) The keyrings to which it points may be modified, but not replaced.
The only safe way to modify anything else is to create a replacement and commit
using the functions described in Documentation/credentials.txt (which will be
added by a later patch).
This patch and the preceding patches have been tested with the LTP SELinux
testsuite.
This patch makes several logical sets of alteration:
(1) execve().
This now prepares and commits credentials in various places in the
security code rather than altering the current creds directly.
(2) Temporary credential overrides.
do_coredump() and sys_faccessat() now prepare their own credentials and
temporarily override the ones currently on the acting thread, whilst
preventing interference from other threads by holding cred_replace_mutex
on the thread being dumped.
This will be replaced in a future patch by something that hands down the
credentials directly to the functions being called, rather than altering
the task's objective credentials.
(3) LSM interface.
A number of functions have been changed, added or removed:
(*) security_capset_check(), ->capset_check()
(*) security_capset_set(), ->capset_set()
Removed in favour of security_capset().
(*) security_capset(), ->capset()
New. This is passed a pointer to the new creds, a pointer to the old
creds and the proposed capability sets. It should fill in the new
creds or return an error. All pointers, barring the pointer to the
new creds, are now const.
(*) security_bprm_apply_creds(), ->bprm_apply_creds()
Changed; now returns a value, which will cause the process to be
killed if it's an error.
(*) security_task_alloc(), ->task_alloc_security()
Removed in favour of security_prepare_creds().
(*) security_cred_free(), ->cred_free()
New. Free security data attached to cred->security.
(*) security_prepare_creds(), ->cred_prepare()
New. Duplicate any security data attached to cred->security.
(*) security_commit_creds(), ->cred_commit()
New. Apply any security effects for the upcoming installation of new
security by commit_creds().
(*) security_task_post_setuid(), ->task_post_setuid()
Removed in favour of security_task_fix_setuid().
(*) security_task_fix_setuid(), ->task_fix_setuid()
Fix up the proposed new credentials for setuid(). This is used by
cap_set_fix_setuid() to implicitly adjust capabilities in line with
setuid() changes. Changes are made to the new credentials, rather
than the task itself as in security_task_post_setuid().
(*) security_task_reparent_to_init(), ->task_reparent_to_init()
Removed. Instead the task being reparented to init is referred
directly to init's credentials.
NOTE! This results in the loss of some state: SELinux's osid no
longer records the sid of the thread that forked it.
(*) security_key_alloc(), ->key_alloc()
(*) security_key_permission(), ->key_permission()
Changed. These now take cred pointers rather than task pointers to
refer to the security context.
(4) sys_capset().
This has been simplified and uses less locking. The LSM functions it
calls have been merged.
(5) reparent_to_kthreadd().
This gives the current thread the same credentials as init by simply using
commit_thread() to point that way.
(6) __sigqueue_alloc() and switch_uid()
__sigqueue_alloc() can't stop the target task from changing its creds
beneath it, so this function gets a reference to the currently applicable
user_struct which it then passes into the sigqueue struct it returns if
successful.
switch_uid() is now called from commit_creds(), and possibly should be
folded into that. commit_creds() should take care of protecting
__sigqueue_alloc().
(7) [sg]et[ug]id() and co and [sg]et_current_groups.
The set functions now all use prepare_creds(), commit_creds() and
abort_creds() to build and check a new set of credentials before applying
it.
security_task_set[ug]id() is called inside the prepared section. This
guarantees that nothing else will affect the creds until we've finished.
The calling of set_dumpable() has been moved into commit_creds().
Much of the functionality of set_user() has been moved into
commit_creds().
The get functions all simply access the data directly.
(8) security_task_prctl() and cap_task_prctl().
security_task_prctl() has been modified to return -ENOSYS if it doesn't
want to handle a function, or otherwise return the return value directly
rather than through an argument.
Additionally, cap_task_prctl() now prepares a new set of credentials, even
if it doesn't end up using it.
(9) Keyrings.
A number of changes have been made to the keyrings code:
(a) switch_uid_keyring(), copy_keys(), exit_keys() and suid_keys() have
all been dropped and built in to the credentials functions directly.
They may want separating out again later.
(b) key_alloc() and search_process_keyrings() now take a cred pointer
rather than a task pointer to specify the security context.
(c) copy_creds() gives a new thread within the same thread group a new
thread keyring if its parent had one, otherwise it discards the thread
keyring.
(d) The authorisation key now points directly to the credentials to extend
the search into rather pointing to the task that carries them.
(e) Installing thread, process or session keyrings causes a new set of
credentials to be created, even though it's not strictly necessary for
process or session keyrings (they're shared).
(10) Usermode helper.
The usermode helper code now carries a cred struct pointer in its
subprocess_info struct instead of a new session keyring pointer. This set
of credentials is derived from init_cred and installed on the new process
after it has been cloned.
call_usermodehelper_setup() allocates the new credentials and
call_usermodehelper_freeinfo() discards them if they haven't been used. A
special cred function (prepare_usermodeinfo_creds()) is provided
specifically for call_usermodehelper_setup() to call.
call_usermodehelper_setkeys() adjusts the credentials to sport the
supplied keyring as the new session keyring.
(11) SELinux.
SELinux has a number of changes, in addition to those to support the LSM
interface changes mentioned above:
(a) selinux_setprocattr() no longer does its check for whether the
current ptracer can access processes with the new SID inside the lock
that covers getting the ptracer's SID. Whilst this lock ensures that
the check is done with the ptracer pinned, the result is only valid
until the lock is released, so there's no point doing it inside the
lock.
(12) is_single_threaded().
This function has been extracted from selinux_setprocattr() and put into
a file of its own in the lib/ directory as join_session_keyring() now
wants to use it too.
The code in SELinux just checked to see whether a task shared mm_structs
with other tasks (CLONE_VM), but that isn't good enough. We really want
to know if they're part of the same thread group (CLONE_THREAD).
(13) nfsd.
The NFS server daemon now has to use the COW credentials to set the
credentials it is going to use. It really needs to pass the credentials
down to the functions it calls, but it can't do that until other patches
in this series have been applied.
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: James Morris <jmorris@namei.org>
Signed-off-by: James Morris <jmorris@namei.org>
2008-11-14 10:39:23 +11:00
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2008-11-11 21:48:18 +11:00
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CRED: Inaugurate COW credentials
Inaugurate copy-on-write credentials management. This uses RCU to manage the
credentials pointer in the task_struct with respect to accesses by other tasks.
A process may only modify its own credentials, and so does not need locking to
access or modify its own credentials.
A mutex (cred_replace_mutex) is added to the task_struct to control the effect
of PTRACE_ATTACHED on credential calculations, particularly with respect to
execve().
With this patch, the contents of an active credentials struct may not be
changed directly; rather a new set of credentials must be prepared, modified
and committed using something like the following sequence of events:
struct cred *new = prepare_creds();
int ret = blah(new);
if (ret < 0) {
abort_creds(new);
return ret;
}
return commit_creds(new);
There are some exceptions to this rule: the keyrings pointed to by the active
credentials may be instantiated - keyrings violate the COW rule as managing
COW keyrings is tricky, given that it is possible for a task to directly alter
the keys in a keyring in use by another task.
To help enforce this, various pointers to sets of credentials, such as those in
the task_struct, are declared const. The purpose of this is compile-time
discouragement of altering credentials through those pointers. Once a set of
credentials has been made public through one of these pointers, it may not be
modified, except under special circumstances:
(1) Its reference count may incremented and decremented.
(2) The keyrings to which it points may be modified, but not replaced.
The only safe way to modify anything else is to create a replacement and commit
using the functions described in Documentation/credentials.txt (which will be
added by a later patch).
This patch and the preceding patches have been tested with the LTP SELinux
testsuite.
This patch makes several logical sets of alteration:
(1) execve().
This now prepares and commits credentials in various places in the
security code rather than altering the current creds directly.
(2) Temporary credential overrides.
do_coredump() and sys_faccessat() now prepare their own credentials and
temporarily override the ones currently on the acting thread, whilst
preventing interference from other threads by holding cred_replace_mutex
on the thread being dumped.
This will be replaced in a future patch by something that hands down the
credentials directly to the functions being called, rather than altering
the task's objective credentials.
(3) LSM interface.
A number of functions have been changed, added or removed:
(*) security_capset_check(), ->capset_check()
(*) security_capset_set(), ->capset_set()
Removed in favour of security_capset().
(*) security_capset(), ->capset()
New. This is passed a pointer to the new creds, a pointer to the old
creds and the proposed capability sets. It should fill in the new
creds or return an error. All pointers, barring the pointer to the
new creds, are now const.
(*) security_bprm_apply_creds(), ->bprm_apply_creds()
Changed; now returns a value, which will cause the process to be
killed if it's an error.
(*) security_task_alloc(), ->task_alloc_security()
Removed in favour of security_prepare_creds().
(*) security_cred_free(), ->cred_free()
New. Free security data attached to cred->security.
(*) security_prepare_creds(), ->cred_prepare()
New. Duplicate any security data attached to cred->security.
(*) security_commit_creds(), ->cred_commit()
New. Apply any security effects for the upcoming installation of new
security by commit_creds().
(*) security_task_post_setuid(), ->task_post_setuid()
Removed in favour of security_task_fix_setuid().
(*) security_task_fix_setuid(), ->task_fix_setuid()
Fix up the proposed new credentials for setuid(). This is used by
cap_set_fix_setuid() to implicitly adjust capabilities in line with
setuid() changes. Changes are made to the new credentials, rather
than the task itself as in security_task_post_setuid().
(*) security_task_reparent_to_init(), ->task_reparent_to_init()
Removed. Instead the task being reparented to init is referred
directly to init's credentials.
NOTE! This results in the loss of some state: SELinux's osid no
longer records the sid of the thread that forked it.
(*) security_key_alloc(), ->key_alloc()
(*) security_key_permission(), ->key_permission()
Changed. These now take cred pointers rather than task pointers to
refer to the security context.
(4) sys_capset().
This has been simplified and uses less locking. The LSM functions it
calls have been merged.
(5) reparent_to_kthreadd().
This gives the current thread the same credentials as init by simply using
commit_thread() to point that way.
(6) __sigqueue_alloc() and switch_uid()
__sigqueue_alloc() can't stop the target task from changing its creds
beneath it, so this function gets a reference to the currently applicable
user_struct which it then passes into the sigqueue struct it returns if
successful.
switch_uid() is now called from commit_creds(), and possibly should be
folded into that. commit_creds() should take care of protecting
__sigqueue_alloc().
(7) [sg]et[ug]id() and co and [sg]et_current_groups.
The set functions now all use prepare_creds(), commit_creds() and
abort_creds() to build and check a new set of credentials before applying
it.
security_task_set[ug]id() is called inside the prepared section. This
guarantees that nothing else will affect the creds until we've finished.
The calling of set_dumpable() has been moved into commit_creds().
Much of the functionality of set_user() has been moved into
commit_creds().
The get functions all simply access the data directly.
(8) security_task_prctl() and cap_task_prctl().
security_task_prctl() has been modified to return -ENOSYS if it doesn't
want to handle a function, or otherwise return the return value directly
rather than through an argument.
Additionally, cap_task_prctl() now prepares a new set of credentials, even
if it doesn't end up using it.
(9) Keyrings.
A number of changes have been made to the keyrings code:
(a) switch_uid_keyring(), copy_keys(), exit_keys() and suid_keys() have
all been dropped and built in to the credentials functions directly.
They may want separating out again later.
(b) key_alloc() and search_process_keyrings() now take a cred pointer
rather than a task pointer to specify the security context.
(c) copy_creds() gives a new thread within the same thread group a new
thread keyring if its parent had one, otherwise it discards the thread
keyring.
(d) The authorisation key now points directly to the credentials to extend
the search into rather pointing to the task that carries them.
(e) Installing thread, process or session keyrings causes a new set of
credentials to be created, even though it's not strictly necessary for
process or session keyrings (they're shared).
(10) Usermode helper.
The usermode helper code now carries a cred struct pointer in its
subprocess_info struct instead of a new session keyring pointer. This set
of credentials is derived from init_cred and installed on the new process
after it has been cloned.
call_usermodehelper_setup() allocates the new credentials and
call_usermodehelper_freeinfo() discards them if they haven't been used. A
special cred function (prepare_usermodeinfo_creds()) is provided
specifically for call_usermodehelper_setup() to call.
call_usermodehelper_setkeys() adjusts the credentials to sport the
supplied keyring as the new session keyring.
(11) SELinux.
SELinux has a number of changes, in addition to those to support the LSM
interface changes mentioned above:
(a) selinux_setprocattr() no longer does its check for whether the
current ptracer can access processes with the new SID inside the lock
that covers getting the ptracer's SID. Whilst this lock ensures that
the check is done with the ptracer pinned, the result is only valid
until the lock is released, so there's no point doing it inside the
lock.
(12) is_single_threaded().
This function has been extracted from selinux_setprocattr() and put into
a file of its own in the lib/ directory as join_session_keyring() now
wants to use it too.
The code in SELinux just checked to see whether a task shared mm_structs
with other tasks (CLONE_VM), but that isn't good enough. We really want
to know if they're part of the same thread group (CLONE_THREAD).
(13) nfsd.
The NFS server daemon now has to use the COW credentials to set the
credentials it is going to use. It really needs to pass the credentials
down to the functions it calls, but it can't do that until other patches
in this series have been applied.
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: James Morris <jmorris@namei.org>
Signed-off-by: James Morris <jmorris@namei.org>
2008-11-14 10:39:23 +11:00
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2008-11-11 21:48:18 +11:00
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CRED: Inaugurate COW credentials
Inaugurate copy-on-write credentials management. This uses RCU to manage the
credentials pointer in the task_struct with respect to accesses by other tasks.
A process may only modify its own credentials, and so does not need locking to
access or modify its own credentials.
A mutex (cred_replace_mutex) is added to the task_struct to control the effect
of PTRACE_ATTACHED on credential calculations, particularly with respect to
execve().
With this patch, the contents of an active credentials struct may not be
changed directly; rather a new set of credentials must be prepared, modified
and committed using something like the following sequence of events:
struct cred *new = prepare_creds();
int ret = blah(new);
if (ret < 0) {
abort_creds(new);
return ret;
}
return commit_creds(new);
There are some exceptions to this rule: the keyrings pointed to by the active
credentials may be instantiated - keyrings violate the COW rule as managing
COW keyrings is tricky, given that it is possible for a task to directly alter
the keys in a keyring in use by another task.
To help enforce this, various pointers to sets of credentials, such as those in
the task_struct, are declared const. The purpose of this is compile-time
discouragement of altering credentials through those pointers. Once a set of
credentials has been made public through one of these pointers, it may not be
modified, except under special circumstances:
(1) Its reference count may incremented and decremented.
(2) The keyrings to which it points may be modified, but not replaced.
The only safe way to modify anything else is to create a replacement and commit
using the functions described in Documentation/credentials.txt (which will be
added by a later patch).
This patch and the preceding patches have been tested with the LTP SELinux
testsuite.
This patch makes several logical sets of alteration:
(1) execve().
This now prepares and commits credentials in various places in the
security code rather than altering the current creds directly.
(2) Temporary credential overrides.
do_coredump() and sys_faccessat() now prepare their own credentials and
temporarily override the ones currently on the acting thread, whilst
preventing interference from other threads by holding cred_replace_mutex
on the thread being dumped.
This will be replaced in a future patch by something that hands down the
credentials directly to the functions being called, rather than altering
the task's objective credentials.
(3) LSM interface.
A number of functions have been changed, added or removed:
(*) security_capset_check(), ->capset_check()
(*) security_capset_set(), ->capset_set()
Removed in favour of security_capset().
(*) security_capset(), ->capset()
New. This is passed a pointer to the new creds, a pointer to the old
creds and the proposed capability sets. It should fill in the new
creds or return an error. All pointers, barring the pointer to the
new creds, are now const.
(*) security_bprm_apply_creds(), ->bprm_apply_creds()
Changed; now returns a value, which will cause the process to be
killed if it's an error.
(*) security_task_alloc(), ->task_alloc_security()
Removed in favour of security_prepare_creds().
(*) security_cred_free(), ->cred_free()
New. Free security data attached to cred->security.
(*) security_prepare_creds(), ->cred_prepare()
New. Duplicate any security data attached to cred->security.
(*) security_commit_creds(), ->cred_commit()
New. Apply any security effects for the upcoming installation of new
security by commit_creds().
(*) security_task_post_setuid(), ->task_post_setuid()
Removed in favour of security_task_fix_setuid().
(*) security_task_fix_setuid(), ->task_fix_setuid()
Fix up the proposed new credentials for setuid(). This is used by
cap_set_fix_setuid() to implicitly adjust capabilities in line with
setuid() changes. Changes are made to the new credentials, rather
than the task itself as in security_task_post_setuid().
(*) security_task_reparent_to_init(), ->task_reparent_to_init()
Removed. Instead the task being reparented to init is referred
directly to init's credentials.
NOTE! This results in the loss of some state: SELinux's osid no
longer records the sid of the thread that forked it.
(*) security_key_alloc(), ->key_alloc()
(*) security_key_permission(), ->key_permission()
Changed. These now take cred pointers rather than task pointers to
refer to the security context.
(4) sys_capset().
This has been simplified and uses less locking. The LSM functions it
calls have been merged.
(5) reparent_to_kthreadd().
This gives the current thread the same credentials as init by simply using
commit_thread() to point that way.
(6) __sigqueue_alloc() and switch_uid()
__sigqueue_alloc() can't stop the target task from changing its creds
beneath it, so this function gets a reference to the currently applicable
user_struct which it then passes into the sigqueue struct it returns if
successful.
switch_uid() is now called from commit_creds(), and possibly should be
folded into that. commit_creds() should take care of protecting
__sigqueue_alloc().
(7) [sg]et[ug]id() and co and [sg]et_current_groups.
The set functions now all use prepare_creds(), commit_creds() and
abort_creds() to build and check a new set of credentials before applying
it.
security_task_set[ug]id() is called inside the prepared section. This
guarantees that nothing else will affect the creds until we've finished.
The calling of set_dumpable() has been moved into commit_creds().
Much of the functionality of set_user() has been moved into
commit_creds().
The get functions all simply access the data directly.
(8) security_task_prctl() and cap_task_prctl().
security_task_prctl() has been modified to return -ENOSYS if it doesn't
want to handle a function, or otherwise return the return value directly
rather than through an argument.
Additionally, cap_task_prctl() now prepares a new set of credentials, even
if it doesn't end up using it.
(9) Keyrings.
A number of changes have been made to the keyrings code:
(a) switch_uid_keyring(), copy_keys(), exit_keys() and suid_keys() have
all been dropped and built in to the credentials functions directly.
They may want separating out again later.
(b) key_alloc() and search_process_keyrings() now take a cred pointer
rather than a task pointer to specify the security context.
(c) copy_creds() gives a new thread within the same thread group a new
thread keyring if its parent had one, otherwise it discards the thread
keyring.
(d) The authorisation key now points directly to the credentials to extend
the search into rather pointing to the task that carries them.
(e) Installing thread, process or session keyrings causes a new set of
credentials to be created, even though it's not strictly necessary for
process or session keyrings (they're shared).
(10) Usermode helper.
The usermode helper code now carries a cred struct pointer in its
subprocess_info struct instead of a new session keyring pointer. This set
of credentials is derived from init_cred and installed on the new process
after it has been cloned.
call_usermodehelper_setup() allocates the new credentials and
call_usermodehelper_freeinfo() discards them if they haven't been used. A
special cred function (prepare_usermodeinfo_creds()) is provided
specifically for call_usermodehelper_setup() to call.
call_usermodehelper_setkeys() adjusts the credentials to sport the
supplied keyring as the new session keyring.
(11) SELinux.
SELinux has a number of changes, in addition to those to support the LSM
interface changes mentioned above:
(a) selinux_setprocattr() no longer does its check for whether the
current ptracer can access processes with the new SID inside the lock
that covers getting the ptracer's SID. Whilst this lock ensures that
the check is done with the ptracer pinned, the result is only valid
until the lock is released, so there's no point doing it inside the
lock.
(12) is_single_threaded().
This function has been extracted from selinux_setprocattr() and put into
a file of its own in the lib/ directory as join_session_keyring() now
wants to use it too.
The code in SELinux just checked to see whether a task shared mm_structs
with other tasks (CLONE_VM), but that isn't good enough. We really want
to know if they're part of the same thread group (CLONE_THREAD).
(13) nfsd.
The NFS server daemon now has to use the COW credentials to set the
credentials it is going to use. It really needs to pass the credentials
down to the functions it calls, but it can't do that until other patches
in this series have been applied.
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: James Morris <jmorris@namei.org>
Signed-off-by: James Morris <jmorris@namei.org>
2008-11-14 10:39:23 +11:00
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2008-11-11 21:48:18 +11:00
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CRED: Inaugurate COW credentials
Inaugurate copy-on-write credentials management. This uses RCU to manage the
credentials pointer in the task_struct with respect to accesses by other tasks.
A process may only modify its own credentials, and so does not need locking to
access or modify its own credentials.
A mutex (cred_replace_mutex) is added to the task_struct to control the effect
of PTRACE_ATTACHED on credential calculations, particularly with respect to
execve().
With this patch, the contents of an active credentials struct may not be
changed directly; rather a new set of credentials must be prepared, modified
and committed using something like the following sequence of events:
struct cred *new = prepare_creds();
int ret = blah(new);
if (ret < 0) {
abort_creds(new);
return ret;
}
return commit_creds(new);
There are some exceptions to this rule: the keyrings pointed to by the active
credentials may be instantiated - keyrings violate the COW rule as managing
COW keyrings is tricky, given that it is possible for a task to directly alter
the keys in a keyring in use by another task.
To help enforce this, various pointers to sets of credentials, such as those in
the task_struct, are declared const. The purpose of this is compile-time
discouragement of altering credentials through those pointers. Once a set of
credentials has been made public through one of these pointers, it may not be
modified, except under special circumstances:
(1) Its reference count may incremented and decremented.
(2) The keyrings to which it points may be modified, but not replaced.
The only safe way to modify anything else is to create a replacement and commit
using the functions described in Documentation/credentials.txt (which will be
added by a later patch).
This patch and the preceding patches have been tested with the LTP SELinux
testsuite.
This patch makes several logical sets of alteration:
(1) execve().
This now prepares and commits credentials in various places in the
security code rather than altering the current creds directly.
(2) Temporary credential overrides.
do_coredump() and sys_faccessat() now prepare their own credentials and
temporarily override the ones currently on the acting thread, whilst
preventing interference from other threads by holding cred_replace_mutex
on the thread being dumped.
This will be replaced in a future patch by something that hands down the
credentials directly to the functions being called, rather than altering
the task's objective credentials.
(3) LSM interface.
A number of functions have been changed, added or removed:
(*) security_capset_check(), ->capset_check()
(*) security_capset_set(), ->capset_set()
Removed in favour of security_capset().
(*) security_capset(), ->capset()
New. This is passed a pointer to the new creds, a pointer to the old
creds and the proposed capability sets. It should fill in the new
creds or return an error. All pointers, barring the pointer to the
new creds, are now const.
(*) security_bprm_apply_creds(), ->bprm_apply_creds()
Changed; now returns a value, which will cause the process to be
killed if it's an error.
(*) security_task_alloc(), ->task_alloc_security()
Removed in favour of security_prepare_creds().
(*) security_cred_free(), ->cred_free()
New. Free security data attached to cred->security.
(*) security_prepare_creds(), ->cred_prepare()
New. Duplicate any security data attached to cred->security.
(*) security_commit_creds(), ->cred_commit()
New. Apply any security effects for the upcoming installation of new
security by commit_creds().
(*) security_task_post_setuid(), ->task_post_setuid()
Removed in favour of security_task_fix_setuid().
(*) security_task_fix_setuid(), ->task_fix_setuid()
Fix up the proposed new credentials for setuid(). This is used by
cap_set_fix_setuid() to implicitly adjust capabilities in line with
setuid() changes. Changes are made to the new credentials, rather
than the task itself as in security_task_post_setuid().
(*) security_task_reparent_to_init(), ->task_reparent_to_init()
Removed. Instead the task being reparented to init is referred
directly to init's credentials.
NOTE! This results in the loss of some state: SELinux's osid no
longer records the sid of the thread that forked it.
(*) security_key_alloc(), ->key_alloc()
(*) security_key_permission(), ->key_permission()
Changed. These now take cred pointers rather than task pointers to
refer to the security context.
(4) sys_capset().
This has been simplified and uses less locking. The LSM functions it
calls have been merged.
(5) reparent_to_kthreadd().
This gives the current thread the same credentials as init by simply using
commit_thread() to point that way.
(6) __sigqueue_alloc() and switch_uid()
__sigqueue_alloc() can't stop the target task from changing its creds
beneath it, so this function gets a reference to the currently applicable
user_struct which it then passes into the sigqueue struct it returns if
successful.
switch_uid() is now called from commit_creds(), and possibly should be
folded into that. commit_creds() should take care of protecting
__sigqueue_alloc().
(7) [sg]et[ug]id() and co and [sg]et_current_groups.
The set functions now all use prepare_creds(), commit_creds() and
abort_creds() to build and check a new set of credentials before applying
it.
security_task_set[ug]id() is called inside the prepared section. This
guarantees that nothing else will affect the creds until we've finished.
The calling of set_dumpable() has been moved into commit_creds().
Much of the functionality of set_user() has been moved into
commit_creds().
The get functions all simply access the data directly.
(8) security_task_prctl() and cap_task_prctl().
security_task_prctl() has been modified to return -ENOSYS if it doesn't
want to handle a function, or otherwise return the return value directly
rather than through an argument.
Additionally, cap_task_prctl() now prepares a new set of credentials, even
if it doesn't end up using it.
(9) Keyrings.
A number of changes have been made to the keyrings code:
(a) switch_uid_keyring(), copy_keys(), exit_keys() and suid_keys() have
all been dropped and built in to the credentials functions directly.
They may want separating out again later.
(b) key_alloc() and search_process_keyrings() now take a cred pointer
rather than a task pointer to specify the security context.
(c) copy_creds() gives a new thread within the same thread group a new
thread keyring if its parent had one, otherwise it discards the thread
keyring.
(d) The authorisation key now points directly to the credentials to extend
the search into rather pointing to the task that carries them.
(e) Installing thread, process or session keyrings causes a new set of
credentials to be created, even though it's not strictly necessary for
process or session keyrings (they're shared).
(10) Usermode helper.
The usermode helper code now carries a cred struct pointer in its
subprocess_info struct instead of a new session keyring pointer. This set
of credentials is derived from init_cred and installed on the new process
after it has been cloned.
call_usermodehelper_setup() allocates the new credentials and
call_usermodehelper_freeinfo() discards them if they haven't been used. A
special cred function (prepare_usermodeinfo_creds()) is provided
specifically for call_usermodehelper_setup() to call.
call_usermodehelper_setkeys() adjusts the credentials to sport the
supplied keyring as the new session keyring.
(11) SELinux.
SELinux has a number of changes, in addition to those to support the LSM
interface changes mentioned above:
(a) selinux_setprocattr() no longer does its check for whether the
current ptracer can access processes with the new SID inside the lock
that covers getting the ptracer's SID. Whilst this lock ensures that
the check is done with the ptracer pinned, the result is only valid
until the lock is released, so there's no point doing it inside the
lock.
(12) is_single_threaded().
This function has been extracted from selinux_setprocattr() and put into
a file of its own in the lib/ directory as join_session_keyring() now
wants to use it too.
The code in SELinux just checked to see whether a task shared mm_structs
with other tasks (CLONE_VM), but that isn't good enough. We really want
to know if they're part of the same thread group (CLONE_THREAD).
(13) nfsd.
The NFS server daemon now has to use the COW credentials to set the
credentials it is going to use. It really needs to pass the credentials
down to the functions it calls, but it can't do that until other patches
in this series have been applied.
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: James Morris <jmorris@namei.org>
Signed-off-by: James Morris <jmorris@namei.org>
2008-11-14 10:39:23 +11:00
|
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|
2008-11-11 21:48:18 +11:00
|
|
|
|
CRED: Inaugurate COW credentials
Inaugurate copy-on-write credentials management. This uses RCU to manage the
credentials pointer in the task_struct with respect to accesses by other tasks.
A process may only modify its own credentials, and so does not need locking to
access or modify its own credentials.
A mutex (cred_replace_mutex) is added to the task_struct to control the effect
of PTRACE_ATTACHED on credential calculations, particularly with respect to
execve().
With this patch, the contents of an active credentials struct may not be
changed directly; rather a new set of credentials must be prepared, modified
and committed using something like the following sequence of events:
struct cred *new = prepare_creds();
int ret = blah(new);
if (ret < 0) {
abort_creds(new);
return ret;
}
return commit_creds(new);
There are some exceptions to this rule: the keyrings pointed to by the active
credentials may be instantiated - keyrings violate the COW rule as managing
COW keyrings is tricky, given that it is possible for a task to directly alter
the keys in a keyring in use by another task.
To help enforce this, various pointers to sets of credentials, such as those in
the task_struct, are declared const. The purpose of this is compile-time
discouragement of altering credentials through those pointers. Once a set of
credentials has been made public through one of these pointers, it may not be
modified, except under special circumstances:
(1) Its reference count may incremented and decremented.
(2) The keyrings to which it points may be modified, but not replaced.
The only safe way to modify anything else is to create a replacement and commit
using the functions described in Documentation/credentials.txt (which will be
added by a later patch).
This patch and the preceding patches have been tested with the LTP SELinux
testsuite.
This patch makes several logical sets of alteration:
(1) execve().
This now prepares and commits credentials in various places in the
security code rather than altering the current creds directly.
(2) Temporary credential overrides.
do_coredump() and sys_faccessat() now prepare their own credentials and
temporarily override the ones currently on the acting thread, whilst
preventing interference from other threads by holding cred_replace_mutex
on the thread being dumped.
This will be replaced in a future patch by something that hands down the
credentials directly to the functions being called, rather than altering
the task's objective credentials.
(3) LSM interface.
A number of functions have been changed, added or removed:
(*) security_capset_check(), ->capset_check()
(*) security_capset_set(), ->capset_set()
Removed in favour of security_capset().
(*) security_capset(), ->capset()
New. This is passed a pointer to the new creds, a pointer to the old
creds and the proposed capability sets. It should fill in the new
creds or return an error. All pointers, barring the pointer to the
new creds, are now const.
(*) security_bprm_apply_creds(), ->bprm_apply_creds()
Changed; now returns a value, which will cause the process to be
killed if it's an error.
(*) security_task_alloc(), ->task_alloc_security()
Removed in favour of security_prepare_creds().
(*) security_cred_free(), ->cred_free()
New. Free security data attached to cred->security.
(*) security_prepare_creds(), ->cred_prepare()
New. Duplicate any security data attached to cred->security.
(*) security_commit_creds(), ->cred_commit()
New. Apply any security effects for the upcoming installation of new
security by commit_creds().
(*) security_task_post_setuid(), ->task_post_setuid()
Removed in favour of security_task_fix_setuid().
(*) security_task_fix_setuid(), ->task_fix_setuid()
Fix up the proposed new credentials for setuid(). This is used by
cap_set_fix_setuid() to implicitly adjust capabilities in line with
setuid() changes. Changes are made to the new credentials, rather
than the task itself as in security_task_post_setuid().
(*) security_task_reparent_to_init(), ->task_reparent_to_init()
Removed. Instead the task being reparented to init is referred
directly to init's credentials.
NOTE! This results in the loss of some state: SELinux's osid no
longer records the sid of the thread that forked it.
(*) security_key_alloc(), ->key_alloc()
(*) security_key_permission(), ->key_permission()
Changed. These now take cred pointers rather than task pointers to
refer to the security context.
(4) sys_capset().
This has been simplified and uses less locking. The LSM functions it
calls have been merged.
(5) reparent_to_kthreadd().
This gives the current thread the same credentials as init by simply using
commit_thread() to point that way.
(6) __sigqueue_alloc() and switch_uid()
__sigqueue_alloc() can't stop the target task from changing its creds
beneath it, so this function gets a reference to the currently applicable
user_struct which it then passes into the sigqueue struct it returns if
successful.
switch_uid() is now called from commit_creds(), and possibly should be
folded into that. commit_creds() should take care of protecting
__sigqueue_alloc().
(7) [sg]et[ug]id() and co and [sg]et_current_groups.
The set functions now all use prepare_creds(), commit_creds() and
abort_creds() to build and check a new set of credentials before applying
it.
security_task_set[ug]id() is called inside the prepared section. This
guarantees that nothing else will affect the creds until we've finished.
The calling of set_dumpable() has been moved into commit_creds().
Much of the functionality of set_user() has been moved into
commit_creds().
The get functions all simply access the data directly.
(8) security_task_prctl() and cap_task_prctl().
security_task_prctl() has been modified to return -ENOSYS if it doesn't
want to handle a function, or otherwise return the return value directly
rather than through an argument.
Additionally, cap_task_prctl() now prepares a new set of credentials, even
if it doesn't end up using it.
(9) Keyrings.
A number of changes have been made to the keyrings code:
(a) switch_uid_keyring(), copy_keys(), exit_keys() and suid_keys() have
all been dropped and built in to the credentials functions directly.
They may want separating out again later.
(b) key_alloc() and search_process_keyrings() now take a cred pointer
rather than a task pointer to specify the security context.
(c) copy_creds() gives a new thread within the same thread group a new
thread keyring if its parent had one, otherwise it discards the thread
keyring.
(d) The authorisation key now points directly to the credentials to extend
the search into rather pointing to the task that carries them.
(e) Installing thread, process or session keyrings causes a new set of
credentials to be created, even though it's not strictly necessary for
process or session keyrings (they're shared).
(10) Usermode helper.
The usermode helper code now carries a cred struct pointer in its
subprocess_info struct instead of a new session keyring pointer. This set
of credentials is derived from init_cred and installed on the new process
after it has been cloned.
call_usermodehelper_setup() allocates the new credentials and
call_usermodehelper_freeinfo() discards them if they haven't been used. A
special cred function (prepare_usermodeinfo_creds()) is provided
specifically for call_usermodehelper_setup() to call.
call_usermodehelper_setkeys() adjusts the credentials to sport the
supplied keyring as the new session keyring.
(11) SELinux.
SELinux has a number of changes, in addition to those to support the LSM
interface changes mentioned above:
(a) selinux_setprocattr() no longer does its check for whether the
current ptracer can access processes with the new SID inside the lock
that covers getting the ptracer's SID. Whilst this lock ensures that
the check is done with the ptracer pinned, the result is only valid
until the lock is released, so there's no point doing it inside the
lock.
(12) is_single_threaded().
This function has been extracted from selinux_setprocattr() and put into
a file of its own in the lib/ directory as join_session_keyring() now
wants to use it too.
The code in SELinux just checked to see whether a task shared mm_structs
with other tasks (CLONE_VM), but that isn't good enough. We really want
to know if they're part of the same thread group (CLONE_THREAD).
(13) nfsd.
The NFS server daemon now has to use the COW credentials to set the
credentials it is going to use. It really needs to pass the credentials
down to the functions it calls, but it can't do that until other patches
in this series have been applied.
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: James Morris <jmorris@namei.org>
Signed-off-by: James Morris <jmorris@namei.org>
2008-11-14 10:39:23 +11:00
|
|
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|
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|
2008-11-11 21:48:18 +11:00
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|
2008-11-11 21:48:22 +11:00
|
|
|
|
|
|
|
|
|
CRED: Inaugurate COW credentials
Inaugurate copy-on-write credentials management. This uses RCU to manage the
credentials pointer in the task_struct with respect to accesses by other tasks.
A process may only modify its own credentials, and so does not need locking to
access or modify its own credentials.
A mutex (cred_replace_mutex) is added to the task_struct to control the effect
of PTRACE_ATTACHED on credential calculations, particularly with respect to
execve().
With this patch, the contents of an active credentials struct may not be
changed directly; rather a new set of credentials must be prepared, modified
and committed using something like the following sequence of events:
struct cred *new = prepare_creds();
int ret = blah(new);
if (ret < 0) {
abort_creds(new);
return ret;
}
return commit_creds(new);
There are some exceptions to this rule: the keyrings pointed to by the active
credentials may be instantiated - keyrings violate the COW rule as managing
COW keyrings is tricky, given that it is possible for a task to directly alter
the keys in a keyring in use by another task.
To help enforce this, various pointers to sets of credentials, such as those in
the task_struct, are declared const. The purpose of this is compile-time
discouragement of altering credentials through those pointers. Once a set of
credentials has been made public through one of these pointers, it may not be
modified, except under special circumstances:
(1) Its reference count may incremented and decremented.
(2) The keyrings to which it points may be modified, but not replaced.
The only safe way to modify anything else is to create a replacement and commit
using the functions described in Documentation/credentials.txt (which will be
added by a later patch).
This patch and the preceding patches have been tested with the LTP SELinux
testsuite.
This patch makes several logical sets of alteration:
(1) execve().
This now prepares and commits credentials in various places in the
security code rather than altering the current creds directly.
(2) Temporary credential overrides.
do_coredump() and sys_faccessat() now prepare their own credentials and
temporarily override the ones currently on the acting thread, whilst
preventing interference from other threads by holding cred_replace_mutex
on the thread being dumped.
This will be replaced in a future patch by something that hands down the
credentials directly to the functions being called, rather than altering
the task's objective credentials.
(3) LSM interface.
A number of functions have been changed, added or removed:
(*) security_capset_check(), ->capset_check()
(*) security_capset_set(), ->capset_set()
Removed in favour of security_capset().
(*) security_capset(), ->capset()
New. This is passed a pointer to the new creds, a pointer to the old
creds and the proposed capability sets. It should fill in the new
creds or return an error. All pointers, barring the pointer to the
new creds, are now const.
(*) security_bprm_apply_creds(), ->bprm_apply_creds()
Changed; now returns a value, which will cause the process to be
killed if it's an error.
(*) security_task_alloc(), ->task_alloc_security()
Removed in favour of security_prepare_creds().
(*) security_cred_free(), ->cred_free()
New. Free security data attached to cred->security.
(*) security_prepare_creds(), ->cred_prepare()
New. Duplicate any security data attached to cred->security.
(*) security_commit_creds(), ->cred_commit()
New. Apply any security effects for the upcoming installation of new
security by commit_creds().
(*) security_task_post_setuid(), ->task_post_setuid()
Removed in favour of security_task_fix_setuid().
(*) security_task_fix_setuid(), ->task_fix_setuid()
Fix up the proposed new credentials for setuid(). This is used by
cap_set_fix_setuid() to implicitly adjust capabilities in line with
setuid() changes. Changes are made to the new credentials, rather
than the task itself as in security_task_post_setuid().
(*) security_task_reparent_to_init(), ->task_reparent_to_init()
Removed. Instead the task being reparented to init is referred
directly to init's credentials.
NOTE! This results in the loss of some state: SELinux's osid no
longer records the sid of the thread that forked it.
(*) security_key_alloc(), ->key_alloc()
(*) security_key_permission(), ->key_permission()
Changed. These now take cred pointers rather than task pointers to
refer to the security context.
(4) sys_capset().
This has been simplified and uses less locking. The LSM functions it
calls have been merged.
(5) reparent_to_kthreadd().
This gives the current thread the same credentials as init by simply using
commit_thread() to point that way.
(6) __sigqueue_alloc() and switch_uid()
__sigqueue_alloc() can't stop the target task from changing its creds
beneath it, so this function gets a reference to the currently applicable
user_struct which it then passes into the sigqueue struct it returns if
successful.
switch_uid() is now called from commit_creds(), and possibly should be
folded into that. commit_creds() should take care of protecting
__sigqueue_alloc().
(7) [sg]et[ug]id() and co and [sg]et_current_groups.
The set functions now all use prepare_creds(), commit_creds() and
abort_creds() to build and check a new set of credentials before applying
it.
security_task_set[ug]id() is called inside the prepared section. This
guarantees that nothing else will affect the creds until we've finished.
The calling of set_dumpable() has been moved into commit_creds().
Much of the functionality of set_user() has been moved into
commit_creds().
The get functions all simply access the data directly.
(8) security_task_prctl() and cap_task_prctl().
security_task_prctl() has been modified to return -ENOSYS if it doesn't
want to handle a function, or otherwise return the return value directly
rather than through an argument.
Additionally, cap_task_prctl() now prepares a new set of credentials, even
if it doesn't end up using it.
(9) Keyrings.
A number of changes have been made to the keyrings code:
(a) switch_uid_keyring(), copy_keys(), exit_keys() and suid_keys() have
all been dropped and built in to the credentials functions directly.
They may want separating out again later.
(b) key_alloc() and search_process_keyrings() now take a cred pointer
rather than a task pointer to specify the security context.
(c) copy_creds() gives a new thread within the same thread group a new
thread keyring if its parent had one, otherwise it discards the thread
keyring.
(d) The authorisation key now points directly to the credentials to extend
the search into rather pointing to the task that carries them.
(e) Installing thread, process or session keyrings causes a new set of
credentials to be created, even though it's not strictly necessary for
process or session keyrings (they're shared).
(10) Usermode helper.
The usermode helper code now carries a cred struct pointer in its
subprocess_info struct instead of a new session keyring pointer. This set
of credentials is derived from init_cred and installed on the new process
after it has been cloned.
call_usermodehelper_setup() allocates the new credentials and
call_usermodehelper_freeinfo() discards them if they haven't been used. A
special cred function (prepare_usermodeinfo_creds()) is provided
specifically for call_usermodehelper_setup() to call.
call_usermodehelper_setkeys() adjusts the credentials to sport the
supplied keyring as the new session keyring.
(11) SELinux.
SELinux has a number of changes, in addition to those to support the LSM
interface changes mentioned above:
(a) selinux_setprocattr() no longer does its check for whether the
current ptracer can access processes with the new SID inside the lock
that covers getting the ptracer's SID. Whilst this lock ensures that
the check is done with the ptracer pinned, the result is only valid
until the lock is released, so there's no point doing it inside the
lock.
(12) is_single_threaded().
This function has been extracted from selinux_setprocattr() and put into
a file of its own in the lib/ directory as join_session_keyring() now
wants to use it too.
The code in SELinux just checked to see whether a task shared mm_structs
with other tasks (CLONE_VM), but that isn't good enough. We really want
to know if they're part of the same thread group (CLONE_THREAD).
(13) nfsd.
The NFS server daemon now has to use the COW credentials to set the
credentials it is going to use. It really needs to pass the credentials
down to the functions it calls, but it can't do that until other patches
in this series have been applied.
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: James Morris <jmorris@namei.org>
Signed-off-by: James Morris <jmorris@namei.org>
2008-11-14 10:39:23 +11:00
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2008-11-11 21:48:22 +11:00
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2013-03-19 00:02:25 -07:00
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2008-11-11 21:48:22 +11:00
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2013-03-19 00:02:25 -07:00
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2009-01-04 14:52:57 -05:00
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2008-11-11 21:48:22 +11:00
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2010-10-30 02:54:44 -04:00
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2013-01-11 14:32:05 -08:00
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2012-01-03 14:23:05 -05:00
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2012-02-07 16:53:48 -08:00
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2012-01-03 14:23:05 -05:00
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2013-11-21 08:14:03 +05:30
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2012-01-03 14:23:05 -05:00
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2012-02-07 16:53:48 -08:00
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2012-01-03 14:23:05 -05:00
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2013-12-11 13:52:26 -05:00
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2012-01-03 14:23:05 -05:00
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2013-11-21 08:14:03 +05:30
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2013-01-11 14:32:05 -08:00
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2007-04-19 10:28:21 -04:00
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2007-07-15 23:41:10 -07:00
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2007-04-19 10:28:21 -04:00
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2013-01-11 14:32:07 -08:00
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2013-11-08 09:57:39 +05:30
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2012-01-03 14:23:05 -05:00
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2007-04-19 10:28:21 -04:00
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2012-04-12 16:47:58 -05:00
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2012-01-03 14:23:05 -05:00
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2013-01-11 14:32:05 -08:00
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2012-01-03 14:23:05 -05:00
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2012-04-12 16:47:58 -05:00
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2007-04-19 10:28:21 -04:00
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2009-06-24 00:02:38 -04:00
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