kernel/ALSA-timer-Fix-leak-in-events-via-snd_timer_user_tin.patch

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From b06a443b5679e9a0298e2f206ddb60845569f62f Mon Sep 17 00:00:00 2001
From: Kangjie Lu <kangjielu@gmail.com>
Date: Tue, 3 May 2016 16:44:32 -0400
Subject: [PATCH 3/3] 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
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@gatech.edu>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
sound/core/timer.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/sound/core/timer.c b/sound/core/timer.c
index e98fa5feb731..c69a27155433 100644
--- a/sound/core/timer.c
+++ b/sound/core/timer.c
@@ -1268,6 +1268,7 @@ static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri,
}
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;
--
2.5.5