From 6be02256f430f800f8bc804a6fc4f72c705428e8 Mon Sep 17 00:00:00 2001 From: Kangjie Lu Date: Tue, 3 May 2016 16:44:07 -0400 Subject: [PATCH] ALSA: timer: Fix leak in SNDRV_TIMER_IOCTL_PARAMS MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: Takashi Iwai Orabug: 25059408 CVE: CVE-2016-4569 Mainline v4.7 commit cec8f96e49d9be372fdb0c3836dcf31ec71e457e Signed-off-by: Chuck Anderson --- sound/core/timer.c | 1 + 1 file changed, 1 insertion(+) diff --git a/sound/core/timer.c b/sound/core/timer.c index a9a1a047c521..72eb1dd6dc76 100644 --- a/sound/core/timer.c +++ b/sound/core/timer.c @@ -1670,6 +1670,7 @@ 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; -- 2.50.1