From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:38092 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751589AbdHGVvb (ORCPT ); Mon, 7 Aug 2017 17:51:31 -0400 Subject: Patch "timers: Fix overflow in get_next_timer_interrupt" has been added to the 4.9-stable tree To: matija.glavinic-pecotic.ext@nokia.com, alexander.sverdlin@nokia.com, gregkh@linuxfoundation.org, tglx@linutronix.de Cc: , From: Date: Mon, 07 Aug 2017 14:51:31 -0700 Message-ID: <150214269190233@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled timers: Fix overflow in get_next_timer_interrupt to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: timers-fix-overflow-in-get_next_timer_interrupt.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 34f41c0316ed52b0b44542491d89278efdaa70e4 Mon Sep 17 00:00:00 2001 From: Matija Glavinic Pecotic Date: Tue, 1 Aug 2017 09:11:52 +0200 Subject: timers: Fix overflow in get_next_timer_interrupt From: Matija Glavinic Pecotic 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 Signed-off-by: Thomas Gleixner Reviewed-by: Alexander Sverdlin Cc: khilman@baylibre.com Cc: akpm@linux-foundation.org Link: http://lkml.kernel.org/r/a7900f04-2a21-c9fd-67be-ab334d459ee5@nokia.com Signed-off-by: Greg Kroah-Hartman --- 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: */ Patches currently in stable-queue which might be from matija.glavinic-pecotic.ext@nokia.com are queue-4.9/timers-fix-overflow-in-get_next_timer_interrupt.patch