linux-kernel - [PATCH 3.11 008/182] tgafb: potential NULL dereference in init

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Message-Id: <1398329507-5911-9-git-send-email-luis.henriques@canonical.com>
Date:	Thu, 24 Apr 2014 09:48:53 +0100
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Dan Carpenter <dan.carpenter@...cle.com>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 3.11 008/182] tgafb: potential NULL dereference in init

3.11.10.9 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@...cle.com>

commit 0ede5804ca3b42c831f7440ec29bc7187e5376bb upstream.

Static checkers complain that there are paths where "tga_type_name" can
be NULL.  I've re-arranged the code slightly so that's impossible.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...com>
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
 drivers/video/tgafb.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/video/tgafb.c b/drivers/video/tgafb.c
index c9c8e5a..ef894b3 100644
--- a/drivers/video/tgafb.c
+++ b/drivers/video/tgafb.c
@@ -1496,10 +1496,9 @@ tgafb_init_fix(struct fb_info *info)
 		if (tga_bus_tc)
 			tga_type_name = "Digital ZLX-E3";
 		break;
-	default:
-		tga_type_name = "Unknown";
-		break;
 	}
+	if (!tga_type_name)
+		tga_type_name = "Unknown";
 
 	strlcpy(info->fix.id, tga_type_name, sizeof(info->fix.id));
 
-- 
1.9.1

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