3.2-stable review patch. If anyone has any objections, please let me know.
------------------ From: Darren Hart <dvh...@linux.intel.com> commit b6070a8d9853eda010a549fa9a09eb8d7269b929 upstream. 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 <dvh...@linux.intel.com> Cc: Dave Jones <da...@redhat.com> Cc: Dan Carpenter <dan.carpen...@oracle.com> Link: http://lkml.kernel.org/r/dc59890338fc413606f04e5c5b131530734dae3d.1342809673.git.dvh...@linux.intel.com Signed-off-by: Thomas Gleixner <t...@linutronix.de> Signed-off-by: Ben Hutchings <b...@decadent.org.uk> --- kernel/futex.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/futex.c b/kernel/futex.c index e2b0fb9..05018bf 100644 --- a/kernel/futex.c +++ b/kernel/futex.c @@ -2370,7 +2370,7 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags, * fault, unlock the rt_mutex and return the fault to userspace. */ if (ret == -EFAULT) { - if (rt_mutex_owner(pi_mutex) == current) + if (pi_mutex && rt_mutex_owner(pi_mutex) == current) rt_mutex_unlock(pi_mutex); } else if (ret == -EINTR) { /* -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
