From 387b3e0a0ce26408e764e7bf268e8d98c4a660b7 Mon Sep 17 00:00:00 2001
From: Kulikov Vasiliy <segooon@gmail.com>
Date: Wed, 28 Jul 2010 20:41:17 +0400
Subject: [PATCH] sound: oss: midi_synth: check get_user() return value

commit b3390ceab95601afc12213c3ec5551d3bc7b638f upstream.

get_user() may fail, if so return -EFAULT.

Signed-off-by: Kulikov Vasiliy <segooon@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
---
 sound/oss/midi_synth.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sound/oss/midi_synth.c b/sound/oss/midi_synth.c
index 11685f12569d..2292c230d7e6 100644
--- a/sound/oss/midi_synth.c
+++ b/sound/oss/midi_synth.c
@@ -519,7 +519,9 @@ midi_synth_load_patch(int dev, int format, const char __user *addr,
 	{
 		unsigned char   data;
 
-		get_user(*(unsigned char *) &data, (unsigned char __user *) &((addr)[hdr_size + i]));
+		if (get_user(data,
+		    (unsigned char __user *)(addr + hdr_size + i)))
+			return -EFAULT;
 
 		eox_seen = (i > 0 && data & 0x80);	/* End of sysex */
 
-- 
2.39.5