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

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

[gregkh]

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 <stable@vger.kernel.org> know about it.


>From 2c13ce8f6b2f6fd9ba2f9261b1939fc0f62d1307 Mon Sep 17 00:00:00 2001
From: Alexey Dobriyan <adobriyan@gmail.com>
Date: Fri, 8 Jul 2016 01:39:11 +0300
Subject: posix_cpu_timer: Exit early when process has been reaped

From: Alexey Dobriyan <adobriyan@gmail.com>

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.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Link: http://lkml.kernel.org/r/20160707223911.GA26483@p183.telecom.by
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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

--- a/kernel/time/posix-cpu-timers.c
+++ b/kernel/time/posix-cpu-timers.c
@@ -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 adobriyan@gmail.com are

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