4.9-stable review patch. If anyone has any objections, please let me know.
------------------ From: Matija Glavinic Pecotic <[email protected]> commit 34f41c0316ed52b0b44542491d89278efdaa70e4 upstream. For e.g. HZ=100, timer being 430 jiffies in the future, and 32 bit unsigned int, there is an overflow on unsigned int right-hand side of the expression which results with wrong values being returned. Type cast the multiplier to 64bit to avoid that issue. Fixes: 46c8f0b077a8 ("timers: Fix get_next_timer_interrupt() computation") Signed-off-by: Matija Glavinic Pecotic <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Reviewed-by: Alexander Sverdlin <[email protected]> Cc: [email protected] Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]> --- kernel/time/timer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/kernel/time/timer.c +++ b/kernel/time/timer.c @@ -1536,7 +1536,7 @@ u64 get_next_timer_interrupt(unsigned lo base->is_idle = false; } else { if (!is_max_delta) - expires = basem + (nextevt - basej) * TICK_NSEC; + expires = basem + (u64)(nextevt - basej) * TICK_NSEC; /* * If we expect to sleep more than a tick, mark the base idle: */
