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| author | Alexey Dobriyan <adobriyan@gmail.com> | 2016-07-08 01:39:11 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-08-10 12:54:49 +0200 |
| commit | 2acf7a3a4af4e9590f06bd89518c139d3a2884db (patch) | |
| tree | f460e02ad1b4e388d7ed1f2bd943b303df3e8deb | |
| parent | 1031db3dff78793352bbda8ab5391def6f372aa4 (diff) | |
| download | lwn-2acf7a3a4af4e9590f06bd89518c139d3a2884db.tar.gz lwn-2acf7a3a4af4e9590f06bd89518c139d3a2884db.zip | |
posix_cpu_timer: Exit early when process has been reaped
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>
| -rw-r--r-- | kernel/time/posix-cpu-timers.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c index 1cafba860b08..39008d78927a 100644 --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -777,6 +777,7 @@ 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); |