linux-kernel - [PATCH 08/10] oss: midi_synth: check get

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Date:	Wed, 28 Jul 2010 20:41:17 +0400
From:	Kulikov Vasiliy <segooon@...il.com>
To:	kernel-janitors@...r.kernel.org
Cc:	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	Roel Kluin <roel.kluin@...il.com>, alsa-devel@...a-project.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 08/10] oss: midi_synth: check get_user() return value

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

Signed-off-by: Kulikov Vasiliy <segooon@...il.com>
---
 sound/oss/midi_synth.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/sound/oss/midi_synth.c b/sound/oss/midi_synth.c
index 3bc7104..3c09374 100644
--- a/sound/oss/midi_synth.c
+++ b/sound/oss/midi_synth.c
@@ -523,7 +523,9 @@ 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 */
 
-- 
1.7.0.4

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