From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:51692 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752118AbcHHOXC (ORCPT ); Mon, 8 Aug 2016 10:23:02 -0400 Subject: Patch "posix_cpu_timer: Exit early when process has been reaped" has been added to the 4.4-stable tree To: adobriyan@gmail.com, gregkh@linuxfoundation.org, tglx@linutronix.de Cc: , From: Date: Mon, 08 Aug 2016 16:22:55 +0200 Message-ID: <147066617514996@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: 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 know about it. >>From 2c13ce8f6b2f6fd9ba2f9261b1939fc0f62d1307 Mon Sep 17 00:00:00 2001 From: Alexey Dobriyan Date: Fri, 8 Jul 2016 01:39:11 +0300 Subject: posix_cpu_timer: Exit early when process has been reaped From: Alexey Dobriyan 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 Link: http://lkml.kernel.org/r/20160707223911.GA26483@p183.telecom.by Signed-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman --- 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