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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <20130127061331.GA4314@udknight>
Date:	Sun, 27 Jan 2013 14:13:32 +0800
From:	Wang YanQing <udknight@...il.com>
To:	FlorianSchandinat@....de
Cc:	spock@...too.org, linux-fbdev@...r.kernel.org,
	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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/