linux/fs/proc
Jann Horn a0b5c04dfc proc: prevent stacking filesystems on top
commit e54ad7f1ee upstream.

This prevents stacking filesystems (ecryptfs and overlayfs) from using
procfs as lower filesystem.  There is too much magic going on inside
procfs, and there is no good reason to stack stuff on top of procfs.

(For example, procfs does access checks in VFS open handlers, and
ecryptfs by design calls open handlers from a kernel thread that doesn't
drop privileges or so.)

Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
History 2016-08-22 22:38:27 +01:00
..
array.c fs/proc, core/debug: Don't expose absolute kernel addresses via wchan 2015-12-13 17:49:51 +00:00
base.c proc: prevent accessing /proc/<PID>/environ until it's ready 2016-06-15 21:29:31 +01:00
cmdline.c fs/proc: don't use module_init for non-modular core code 2014-01-23 16:37:02 -08:00
consoles.c fs/proc: don't use module_init for non-modular core code 2014-01-23 16:37:02 -08:00
cpuinfo.c fs/proc: don't use module_init for non-modular core code 2014-01-23 16:37:02 -08:00
devices.c fs/proc: don't use module_init for non-modular core code 2014-01-23 16:37:02 -08:00
fd.c proc: actually make proc_fd_permission() thread-friendly 2015-12-13 17:49:12 +00:00
fd.h proc: Move proc_fd() to fs/proc/fd.h 2013-05-01 17:29:39 -04:00
generic.c proc: Allow creating permanently empty directories that serve as mount points 2015-07-15 10:01:06 +01:00
inode.c proc: Allow creating permanently empty directories that serve as mount points 2015-07-15 10:01:06 +01:00
internal.h proc: Allow creating permanently empty directories that serve as mount points 2015-07-15 10:01:06 +01:00
interrupts.c fs/proc: don't use module_init for non-modular core code 2014-01-23 16:37:02 -08:00
Kconfig kcore: add Kconfig help text 2013-11-13 12:09:33 +09:00
kcore.c fs/proc: don't use module_init for non-modular core code 2014-01-23 16:37:02 -08:00
kmsg.c fs/proc: don't use module_init for non-modular core code 2014-01-23 16:37:02 -08:00
loadavg.c fs/proc: don't use module_init for non-modular core code 2014-01-23 16:37:02 -08:00
Makefile of: remove /proc/device-tree 2014-03-11 20:48:32 +00:00
meminfo.c fs/proc/meminfo: meminfo_proc_show(): fix typo in comment 2014-04-07 16:36:04 -07:00
namespaces.c new helper: readlink_copy() 2014-04-01 23:19:15 -04:00
nommu.c fs/proc: don't use module_init for non-modular core code 2014-01-23 16:37:02 -08:00
page.c mm: close PageTail race 2014-03-04 07:55:47 -08:00
proc_net.c [readdir] convert procfs 2013-06-29 12:56:32 +04:00
proc_sysctl.c sysctl: Allow creating permanently empty directories that serve as mountpoints. 2015-07-15 10:01:06 +01:00
proc_tty.c proc: use seq_puts()/seq_putc() where possible 2011-01-13 08:03:16 -08:00
root.c proc: prevent stacking filesystems on top 2016-08-22 22:38:27 +01:00
self.c new helper: readlink_copy() 2014-04-01 23:19:15 -04:00
softirqs.c fs/proc: don't use module_init for non-modular core code 2014-01-23 16:37:02 -08:00
stat.c genirq: Prevent proc race against freeing of irq descriptors 2015-01-15 10:44:31 +00:00
task_mmu.c pagemap: do not leak physical addresses to non-privileged userspace 2015-03-30 11:11:38 +01:00
task_nommu.c seq_file: remove "%n" usage from seq_file users 2013-11-15 09:32:20 +09:00
uptime.c cputime: Default implementation of nsecs -> cputime conversion 2014-03-13 15:56:43 +01:00
version.c fs/proc: don't use module_init for non-modular core code 2014-01-23 16:37:02 -08:00
vmcore.c fs/proc/vmcore.c: remove NULL assignment to static 2014-06-06 16:08:12 -07:00