linux-kernel - [PATCH] staging: fix possible use-before-NULL-check crash

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Date:	Wed, 6 Oct 2010 15:39:41 -0700
From:	Kees Cook <kees.cook@...onical.com>
To:	linux-kernel@...r.kernel.org
Cc:	devel@...verdev.osuosl.org, Greg Kroah-Hartman <gregkh@...e.de>,
	Mauro Carvalho Chehab <mchehab@...hat.com>,
	Stefan Ringel <stefan.ringel@...or.de>,
	Stephen Rothwell <sfr@...b.auug.org.au>
Subject: [PATCH] staging: fix possible use-before-NULL-check crash

Found via http://coccinelle.lip6.fr/rules/mini_null_ref.cocci

Signed-off-by: Kees Cook <kees.cook@...onical.com>
---
 drivers/staging/tm6000/tm6000-alsa.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/staging/tm6000/tm6000-alsa.c b/drivers/staging/tm6000/tm6000-alsa.c
index 087137d..c1aff0e 100644
--- a/drivers/staging/tm6000/tm6000-alsa.c
+++ b/drivers/staging/tm6000/tm6000-alsa.c
@@ -426,10 +426,11 @@ error:
 
 static int tm6000_audio_fini(struct tm6000_core *dev)
 {
-	struct snd_tm6000_card	*chip = dev->adev;
+	struct snd_tm6000_card	*chip;
 
 	if (!dev)
 		return 0;
+	chip = dev->adev;
 
 	if (!chip)
 		return 0;
-- 
1.7.1


-- 
Kees Cook
Ubuntu Security Team
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