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| author | John Stultz <john.stultz@linaro.org> | 2011-08-04 16:25:35 +0200 |
|---|---|---|
| committer | John Stultz <john.stultz@linaro.org> | 2011-08-10 16:09:53 +0200 |
| commit | 971c90bfa2f0b4fe52d6d9002178d547706f1343 (patch) | |
| tree | f3075f495780a0ffc5d433ae7cb93aca8a40cf8e /kernel/time/alarmtimer.c | |
| parent | Linux 3.1-rc1 (diff) | |
| download | linux-971c90bfa2f0b4fe52d6d9002178d547706f1343.tar.xz linux-971c90bfa2f0b4fe52d6d9002178d547706f1343.zip | |
alarmtimers: Avoid possible null pointer traversal
We don't check if old_setting is non null before assigning it, so
correct this.
CC: Thomas Gleixner <tglx@linutronix.de>
CC: stable@kernel.org
Signed-off-by: John Stultz <john.stultz@linaro.org>
Diffstat (limited to 'kernel/time/alarmtimer.c')
| -rw-r--r-- | kernel/time/alarmtimer.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c index 59f369f98a04..1dee3f62a6a7 100644 --- a/kernel/time/alarmtimer.c +++ b/kernel/time/alarmtimer.c @@ -479,11 +479,8 @@ static int alarm_timer_set(struct k_itimer *timr, int flags, if (!rtcdev) return -ENOTSUPP; - /* Save old values */ - old_setting->it_interval = - ktime_to_timespec(timr->it.alarmtimer.period); - old_setting->it_value = - ktime_to_timespec(timr->it.alarmtimer.node.expires); + if (old_setting) + alarm_timer_get(timr, old_setting); /* If the timer was already set, cancel it */ alarm_cancel(&timr->it.alarmtimer); |