From: Ahmed S. Darwish <darwish.07@gmail.com>
Date: Thu, 20 Mar 2008 00:00:51 +0000 (-0700)
Subject: smack: do not dereference NULL ipc object
X-Git-Tag: v2.6.25-rc7~84
X-Git-Url: http://git.samba.org/samba.git/?p=sfrench%2Fcifs-2.6.git;a=commitdiff_plain;h=1d252fb870aa9cd227c4beb1a226ecd434f57f28;hp=1d252fb870aa9cd227c4beb1a226ecd434f57f28

smack: do not dereference NULL ipc object

In the SYSV ipc msgctl(),semctl(),shmctl() family, if the user passed *_INFO
as the desired operation, no specific object is meant to be controlled and
only system-wide information is returned.  This leads to a NULL IPC object in
the LSM hooks if the _INFO flag is given.

Avoid dereferencing this NULL pointer in Smack ipc *ctl() methods.

Signed-off-by: Ahmed S. Darwish <darwish.07@gmail.com>
Acked-by: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---