linux/security
Alan Cox 731572d39f nfsd: fix vm overcommit crash
Junjiro R.  Okajima reported a problem where knfsd crashes if you are
using it to export shmemfs objects and run strict overcommit.  In this
situation the current->mm based modifier to the overcommit goes through a
NULL pointer.

We could simply check for NULL and skip the modifier but we've caught
other real bugs in the past from mm being NULL here - cases where we did
need a valid mm set up (eg the exec bug about a year ago).

To preserve the checks and get the logic we want shuffle the checking
around and add a new helper to the vm_ security wrappers

Also fix a current->mm reference in nommu that should use the passed mm

[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: fix build]
Reported-by: Junjiro R. Okajima <hooanon05@yahoo.co.jp>
Acked-by: James Morris <jmorris@namei.org>
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-30 11:38:47 -07:00
..
keys keys: remove unused key_alloc_sem 2008-06-06 11:29:11 -07:00
selinux Merge branches 'timers/clocksource', 'timers/hrtimers', 'timers/nohz', 'timers/ntp', 'timers/posixtimers' and 'timers/debug' into v28-timers-for-linus 2008-10-20 13:14:06 +02:00
smack Merge branch 'master' of git://git.infradead.org/users/pcmoore/lblnet-2.6_next into next 2008-10-11 09:26:14 +11:00
capability.c security: Fix setting of PF_SUPERPRIV by __capable() 2008-08-14 22:59:43 +10:00
commoncap.c file capabilities: uninline cap_safe_nice 2008-09-27 15:07:56 +10:00
device_cgroup.c devcgroup: remove spin_lock() 2008-10-20 08:52:38 -07:00
inode.c integrity: special fs magic 2008-10-13 09:47:43 +11:00
Kconfig securityfs: do not depend on CONFIG_SECURITY 2008-08-28 10:47:42 +10:00
Makefile securityfs: do not depend on CONFIG_SECURITY 2008-08-28 10:47:42 +10:00
root_plug.c security: Fix setting of PF_SUPERPRIV by __capable() 2008-08-14 22:59:43 +10:00
security.c nfsd: fix vm overcommit crash 2008-10-30 11:38:47 -07:00