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authorKangjie Lu <kangjielu@gmail.com>2016-05-03 16:44:20 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-05-20 14:18:45 +0200
commitbbb79774fcea8b92df051d1d68fcba18d884f860 (patch)
treecca1909a7d2be3cb2412b8b69f2667e91d9ea823
parentbbcf19d306745832e043e02c7b3d4f4fad82d61e (diff)
ALSA: timer: Fix leak in events via snd_timer_user_ccallback
commit 9a47e9cff994f37f7f0dbd9ae23740d0f64f9fe6 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: Amit Pundir <amit.pundir@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--sound/core/timer.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/sound/core/timer.c b/sound/core/timer.c
index ede058bd49a4..47c8beb5eb40 100644
--- a/sound/core/timer.c
+++ b/sound/core/timer.c
@@ -1260,6 +1260,7 @@ static void snd_timer_user_ccallback(struct snd_timer_instance *timeri,
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;