linux-kernel - [PATCH]video:uvesafb: Fix dereference NULL pointer code path

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Message-ID: <20130330025330.GA25246@udknight>
Date:	Sat, 30 Mar 2013 10:53:30 +0800
From:	Wang YanQing <udknight@...il.com>
To:	tomi.valkeinen@...com
Cc:	spock@...too.org, linux-fbdev@...r.kernel.org,
	FlorianSchandinat@....de, linux-kernel@...r.kernel.org
Subject: [PATCH]video:uvesafb: Fix dereference NULL pointer code path

platform_device_alloc could failed and return NULL,
we should check this before call platform_device_put.

Signed-off-by: Wang YanQing <udknight@...il.com>
---
 drivers/video/uvesafb.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/video/uvesafb.c b/drivers/video/uvesafb.c
index 2f8f82d..230bd45 100644
--- a/drivers/video/uvesafb.c
+++ b/drivers/video/uvesafb.c
@@ -1975,7 +1975,8 @@ static int __devinit uvesafb_init(void)
 			err = -ENOMEM;
 
 		if (err) {
-			platform_device_put(uvesafb_device);
+			if (uvesafb_device)
+				platform_device_put(uvesafb_device);
 			platform_driver_unregister(&uvesafb_driver);
 			cn_del_callback(&uvesafb_cn_id);
 			return err;
-- 
1.7.11.1.116.g8228a23
--
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