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time: Catch invalid timespec sleep values in __timekeeping_inject_sleeptime 

Arve suggested making sure we catch possible negative sleep time
intervals that could be passed into timekeeping_inject_sleeptime.

CC: Arve Hjønnevåg <arve@android.com>
CC: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>
This commit is contained in:
John Stultz 2011-06-01 18:18:09 -07:00
parent e08f6d4131
commit cb5de2f8d0
1 changed files with 6 additions and 0 deletions
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6
kernel/time/timekeeping.c
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@ -604,6 +604,12 @@ static struct timespec timekeeping_suspend_time;
*/ */
static void __timekeeping_inject_sleeptime(struct timespec *delta) static void __timekeeping_inject_sleeptime(struct timespec *delta)
{ {
if (!timespec_valid(delta)) {
printk(KERN_WARN "__timekeeping_inject_sleeptime: Invalid "
"sleep delta value!\n");
return;
}
xtime = timespec_add(xtime, *delta); xtime = timespec_add(xtime, *delta);
wall_to_monotonic = timespec_sub(wall_to_monotonic, *delta); wall_to_monotonic = timespec_sub(wall_to_monotonic, *delta);
total_sleep_time = timespec_add(total_sleep_time, *delta); total_sleep_time = timespec_add(total_sleep_time, *delta);