This is a note to let you know that I've just added the patch titled ALSA: timer: Fix leak in events via snd_timer_user_tinterrupt to the 3.18-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: alsa-timer-fix-leak-in-events-via-snd_timer_user_tinterrupt.patch and it can be found in the queue-3.18 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From e4ec8cc8039a7063e24204299b462bd1383184a5 Mon Sep 17 00:00:00 2001 From: Kangjie Lu <kangjielu@xxxxxxxxx> Date: Tue, 3 May 2016 16:44:32 -0400 Subject: ALSA: timer: Fix leak in events via snd_timer_user_tinterrupt MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Kangjie Lu <kangjielu@xxxxxxxxx> commit e4ec8cc8039a7063e24204299b462bd1383184a5 upstream. The stack object “r1” has a total size of 32 bytes. Its field “event” and “val” both contain 4 bytes padding. These 8 bytes padding bytes are sent to user without being initialized. Signed-off-by: Kangjie Lu <kjlu@xxxxxxxxxx> Signed-off-by: Takashi Iwai <tiwai@xxxxxxx> Signed-off-by: Amit Pundir <amit.pundir@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- sound/core/timer.c | 1 + 1 file changed, 1 insertion(+) --- a/sound/core/timer.c +++ b/sound/core/timer.c @@ -1295,6 +1295,7 @@ static void snd_timer_user_tinterrupt(st } if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) && tu->last_resolution != resolution) { + memset(&r1, 0, sizeof(r1)); r1.event = SNDRV_TIMER_EVENT_RESOLUTION; r1.tstamp = tstamp; r1.val = resolution; Patches currently in stable-queue which might be from kangjielu@xxxxxxxxx are queue-3.18/alsa-timer-fix-leak-in-events-via-snd_timer_user_ccallback.patch queue-3.18/alsa-timer-fix-leak-in-sndrv_timer_ioctl_params.patch queue-3.18/alsa-timer-fix-leak-in-events-via-snd_timer_user_tinterrupt.patch