From: Kangjie Lu Date: Tue, 3 May 2016 16:44:20 -0400 Subject: [1/2] ALSA: timer: Fix leak in events via snd_timer_user_ccallback MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Origin: https://git.kernel.org/linus/9a47e9cff994f37f7f0dbd9ae23740d0f64f9fe6 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 Signed-off-by: Takashi Iwai --- sound/core/timer.c | 1 + 1 file changed, 1 insertion(+) --- a/sound/core/timer.c +++ b/sound/core/timer.c @@ -1247,6 +1247,7 @@ static void snd_timer_user_ccallback(str tu->tstamp = *tstamp; if ((tu->filter & (1 << event)) == 0 || !tu->tread) return; + memset(&r1, 0, sizeof(r1)); r1.event = event; r1.tstamp = *tstamp; r1.val = resolution;