[PATCH] infoleak fix2 in timer

From	Kangjie Lu <kangjielu@gmail.com>
Newsgroups	linux.kernel
Subject	[PATCH] infoleak fix2 in timer
Date	2016-05-03 22:50 +0200
Message-ID	<ruPqy-6Hu-3@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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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>
---
 sound/core/timer.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/core/timer.c b/sound/core/timer.c
index 964f5eb..e98fa5f 100644
--- a/sound/core/timer.c
+++ b/sound/core/timer.c
@@ -1225,6 +1225,7 @@ 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;
-- 
1.9.1

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[PATCH] infoleak fix2 in timer Kangjie Lu <kangjielu@gmail.com> - 2016-05-03 22:50 +0200

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