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authorJohn Stultz <john.stultz@linaro.org>2011-06-01 18:18:09 -0700
committerJohn Stultz <john.stultz@linaro.org>2011-06-21 16:55:36 -0700
commitcb5de2f8d0306be38f9b377b8a5c56acca7dbc3d (patch)
tree9edd5bd1fd1e41be44026a37b2184200f6f90d50 /kernel/time
parente08f6d4131ab964420f0bcabecc68d75fb49df79 (diff)
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>
Diffstat (limited to 'kernel/time')
-rw-r--r--kernel/time/timekeeping.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 342408cf68dd..9d09777a213f 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -604,6 +604,12 @@ static struct timespec timekeeping_suspend_time;
*/
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);
wall_to_monotonic = timespec_sub(wall_to_monotonic, *delta);
total_sleep_time = timespec_add(total_sleep_time, *delta);