timer: Prevent overflow in apply_slack

[firefly-linux-kernel-4.4.55.git] / kernel / timer.c

diff --git a/kernel/timer.c b/kernel/timer.c
index 87bd529879c23bb12705fa0144cff354064f91dc..3bb01a323b2a3e0ae9291271f4dc0322f01bfd80 100644 (file)
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -838,7 +838,7 @@ unsigned long apply_slack(struct timer_list *timer, unsigned long expires)
 
        bit = find_last_bit(&mask, BITS_PER_LONG);
 
-       mask = (1 << bit) - 1;
+       mask = (1UL << bit) - 1;
 
        expires_limit = expires_limit & ~(mask);