From a98fa05b08e4226bcc1af32ee8c9ec8f1941333d 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: Greg Kroah-Hartman <gregkh@suse.de>
---
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 f83f0725391f..978423ea07cd 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 */
--
2.34.1