[PATCH 3.12 72/88] ALSA: timer: Fix leak in SNDRV_TIMER_IOCTL_PARAMS

[Jiri Slaby]

From: Kangjie Lu <kangjielu@xxxxxxxxx>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit cec8f96e49d9be372fdb0c3836dcf31ec71e457e upstream.

The stack object âtreadâ has a total size of 32 bytes. Its field
âeventâ and âvalâ 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: Jiri Slaby <jslaby@xxxxxxx>
---
 sound/core/timer.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/core/timer.c b/sound/core/timer.c
index 10463beae4bb..7bf8186472fb 100644
--- a/sound/core/timer.c
+++ b/sound/core/timer.c
@@ -1717,6 +1717,7 @@ 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;
-- 
2.9.1