futex: Test for pi_mutex on fault in futex_wait_requeue_pi()
authorDarren Hart <dvhart@linux.intel.com>
Fri, 20 Jul 2012 18:53:29 +0000 (11:53 -0700)
committerThomas Gleixner <tglx@linutronix.de>
Tue, 24 Jul 2012 14:02:56 +0000 (16:02 +0200)
commitb6070a8d9853eda010a549fa9a09eb8d7269b929
treeb83d2acd7e1b7de62bb3d6e50c41b24a2184c9b1
parent40b3c43f042c2ba8915aff5c63708207ed7639cb
futex: Test for pi_mutex on fault in futex_wait_requeue_pi()

If fixup_pi_state_owner() faults, pi_mutex may be NULL. Test
for pi_mutex != NULL before testing the owner against current
and possibly unlocking it.

Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/dc59890338fc413606f04e5c5b131530734dae3d.1342809673.git.dvhart@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
kernel/futex.c