commit: 5b3900cd409466c0070b234d941650685ad0c791 From: Dan Carpenter <[email protected]> Date: Tue, 9 Oct 2012 10:18:23 +0300 Subject: timekeeping: Cast raw_interval to u64 to avoid shift overflow
We fixed a bunch of integer overflows in timekeeping code during the 3.6 cycle. I did an audit based on that and found this potential overflow. Signed-off-by: Dan Carpenter <[email protected]> Acked-by: John Stultz <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]> Cc: [email protected] --- kernel/time/timekeeping.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index 16280ff..3eb3fc7c 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -1045,7 +1045,7 @@ static cycle_t logarithmic_accumulation(struct timekeeper *tk, cycle_t offset, accumulate_nsecs_to_secs(tk); /* Accumulate raw time */ - raw_nsecs = tk->raw_interval << shift; + raw_nsecs = (u64)tk->raw_interval << shift; raw_nsecs += tk->raw_time.tv_nsec; if (raw_nsecs >= NSEC_PER_SEC) { u64 raw_secs = raw_nsecs; -- 1.7.3.4 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
