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ALSA: timer: Fix leak in events via snd_timer_user_tinterrupt

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commit e4ec8cc803 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kangjie Lu
2016-05-03 16:44:32 -04:00
committed by Greg Kroah-Hartman
parent 3e6af33c73
commit 8fd58e050f
1 changed files with 1 additions and 0 deletions
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sound/core/timer.c
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@@ -1282,6 +1282,7 @@ static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri,
} }
if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) && if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) &&
tu->last_resolution != resolution) { tu->last_resolution != resolution) {
memset(&r1, 0, sizeof(r1));
r1.event = SNDRV_TIMER_EVENT_RESOLUTION; r1.event = SNDRV_TIMER_EVENT_RESOLUTION;
r1.tstamp = tstamp; r1.tstamp = tstamp;
r1.val = resolution; r1.val = resolution;