linux-kernel - [PATCH] drivers/media/video: Correct NULL test

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: <Pine.LNX.4.64.0912281509340.6928@ask.diku.dk>
Date:	Mon, 28 Dec 2009 15:09:55 +0100 (CET)
From:	Julia Lawall <julia@...u.dk>
To:	mchehab@...radead.org, linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH] drivers/media/video: Correct NULL test

From: Julia Lawall <julia@...u.dk>

Test the just-allocated value for NULL rather than some other value.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r@
identifier f;
@@

f(...) { <+... return NULL; ...+> }

@@
expression *x;
expression y;
identifier r.f;
statement S;
@@

x = f(...);
(
if ((x) == NULL) S
|
if (
-   y
+   x
       == NULL)
 S
)
// </smpl>

Signed-off-by: Julia Lawall <julia@...u.dk>

---
 drivers/media/video/usbvision/usbvision-video.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -u -p a/drivers/media/video/usbvision/usbvision-video.c b/drivers/media/video/usbvision/usbvision-video.c
--- a/drivers/media/video/usbvision/usbvision-video.c
+++ b/drivers/media/video/usbvision/usbvision-video.c
@@ -1487,7 +1487,7 @@ static int __devinit usbvision_register_
 		usbvision->vbi = usbvision_vdev_init(usbvision,
 						     &usbvision_vbi_template,
 						     "USBVision VBI");
-		if (usbvision->vdev == NULL) {
+		if (usbvision->vbi == NULL) {
 			goto err_exit;
 		}
 		if (video_register_device(usbvision->vbi,
--
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/