| Message ID | 1379371429-22214-2-git-send-email-khilman@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 4b1fe3e..3d7c80e 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -2203,7 +2203,7 @@ u64 scheduler_tick_max_deferment(void) if (time_before_eq(next, now)) return 0; - return jiffies_to_usecs(next - now) * NSEC_PER_USEC; + return (u64)jiffies_to_usecs(next - now) * NSEC_PER_USEC; } static __init int sched_nohz_full_init_debug(void)
The conversion of the max deferment from usecs to nsecs can easily overflow on platforms where a long is 32-bits. To fix, cast the usecs value to u64 before multiplying by NSECS_PER_USEC. This was discovered on 32-bit ARM platform when extending the max deferment value. Cc: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Kevin Hilman <khilman@linaro.org> --- kernel/sched/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)