From c76456ef3f9371a7647f6dea87e8cdcc38cb33db Mon Sep 17 00:00:00 2001
From: Kangjie Lu <kangjielu@gmail.com>
Date: Tue, 3 May 2016 16:44:07 -0400
Subject: [PATCH] ALSA: timer: Fix leak in SNDRV_TIMER_IOCTL_PARAMS
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commit cec8f96e49d9be372fdb0c3836dcf31ec71e457e upstream.

The stack object “tread” 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@gatech.edu>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
 sound/core/timer.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/core/timer.c b/sound/core/timer.c
index 3e36dbe52900..b77858f39a38 100644
--- a/sound/core/timer.c
+++ b/sound/core/timer.c
@@ -1712,6 +1712,7 @@ static int snd_timer_user_params(struct file *file,
 	if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) {
 		if (tu->tread) {
 			struct snd_timer_tread tread;
+			memset(&tread, 0, sizeof(tread));
 			tread.event = SNDRV_TIMER_EVENT_EARLY;
 			tread.tstamp.tv_sec = 0;
 			tread.tstamp.tv_nsec = 0;
-- 
2.39.2