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authorAlexey Dobriyan <adobriyan@gmail.com>2016-07-08 01:39:11 +0300
committerSasha Levin <alexander.levin@verizon.com>2016-08-06 12:52:07 -0400
commitf8e307805ad3e4cd26d9d9ed7995ec36d82e4324 (patch)
tree1a60be9ca1f946df9f151c72fc82b4d1de45a6e7 /kernel
parent47eec480c93227ddde8c4ee5c46cbb1d038c3b4d (diff)
posix_cpu_timer: Exit early when process has been reaped
[ Upstream commit 2c13ce8f6b2f6fd9ba2f9261b1939fc0f62d1307 ] 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> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/20160707223911.GA26483@p183.telecom.by Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/time/posix-cpu-timers.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c
index 0075da74abf0..57d1acb91c56 100644
--- a/kernel/time/posix-cpu-timers.c
+++ b/kernel/time/posix-cpu-timers.c
@@ -784,6 +784,7 @@ static void posix_cpu_timer_get(struct k_itimer *timer, struct itimerspec *itp)
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);