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linux/security
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Sasha Levin 43e6badd6f KEYS: close race between key lookup and freeing 
commit a3a8784454 upstream.

When a key is being garbage collected, it's key->user would get put before
the ->destroy() callback is called, where the key is removed from it's
respective tracking structures.

This leaves a key hanging in a semi-invalid state which leaves a window open
for a different task to try an access key->user. An example is
find_keyring_by_name() which would dereference key->user for a key that is
in the process of being garbage collected (where key->user was freed but
->destroy() wasn't called yet - so it's still present in the linked list).

This would cause either a panic, or corrupt memory.

Fixes CVE-2014-9529.

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Moritz Muehlenhoff <jmm@inutil.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
History 2015-01-15 10:44:59 +00:00
..
apparmor nick kvfree() from apparmor 2014-05-06 14:02:53 -04:00
integrity evm: properly handle INTEGRITY_NOXATTRS EVM status 2014-11-14 15:20:09 +00:00
keys KEYS: close race between key lookup and freeing 2015-01-15 10:44:59 +00:00
selinux move d_rcu from overlapping d_child to overlapping d_alias 2015-01-15 10:44:58 +00:00
smack Merge branch 'smack-for-3.16' of git://git.gitorious.org/smack-next/kernel into next 2014-05-20 14:50:09 +10:00
tomoyo get rid of pointless checks for NULL ->i_op 2014-04-01 23:19:16 -04:00
yama yama: Better permission check for ptraceme 2013-03-26 13:17:58 -07:00
capability.c Merge tag 'keys-20140314' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs into next 2014-04-14 11:42:49 +10:00
commoncap.c CAPABILITIES: remove undefined caps from all processes 2014-09-17 09:21:53 -07:00
device_cgroup.c device_cgroup: use css_has_online_children() instead of has_children() 2014-05-16 13:22:52 -04:00
inode.c securityfs: fix object creation races 2012-01-10 10:20:35 -05:00
Kconfig security: select correct default LSM_MMAP_MIN_ADDR on arm on arm64 2014-02-05 14:59:14 +00:00
lsm_audit.c audit: anchor all pid references in the initial pid namespace 2014-03-20 10:11:55 -04:00
Makefile security: cleanup Makefiles to use standard syntax for specifying sub-directories 2014-02-17 11:08:04 +11:00
min_addr.c mmap_min_addr check CAP_SYS_RAWIO only for write 2010-04-23 08:56:31 +10:00
security.c Merge branch 'serge-next-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sergeh/linux-security 2014-06-10 10:05:36 -07:00