Patch "posix_cpu_timer: Exit early when process has been reaped" has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

posix_cpu_timer: Exit early when process has been reaped

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
posix_cpu_timer-exit-early-when-process-has-been-reaped.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Alexey Dobriyan <[email protected]>
Date: Fri, 8 Jul 2016 01:39:11 +0300
Subject: posix_cpu_timer: Exit early when process has been reaped

From: Alexey Dobriyan <[email protected]>

commit 2c13ce8f6b2f6fd9ba2f9261b1939fc0f62d1307 upstream.

Variable "now" seems to be genuinely used unintialized if branch

	if (CPUCLOCK_PERTHREAD(timer->it_clock)) {

is not taken and branch

	if (unlikely(sighand == NULL)) {

is taken. In this case the process has been reaped and the timer is marked as disarmed anyway. So none of the postprocessing of the sample is required. Return right away.

---
 kernel/time/posix-cpu-timers.c |    1 +
 1 file changed, 1 insertion(+)

@@ -808,6 +808,7 @@ static void posix_cpu_timer_get(struct k
 			timer->it.cpu.expires = 0;
 			sample_to_timespec(timer->it_clock, timer->it.cpu.expires,
 					   &itp->it_value);
+			return;
 		} else {
 			cpu_timer_sample_group(timer->it_clock, p, &now);
 			unlock_task_sighand(p, &flags);

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/posix_cpu_timer-exit-early-when-process-has-been-reaped.patch