linux-kernel - [PATCH] V4L: check inval in video_register_device

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Message-ID: <48AF164F.308@nachtwindheim.de>
Date:	Fri, 22 Aug 2008 21:41:03 +0200
From:	Henne <henne@...htwindheim.de>
To:	mchehab@...radead.org
CC:	video4linux-list@...hat.com, linux-kernel@...r.kernel.org
Subject: [PATCH] V4L: check inval in video_register_device_index()

From: Henrik Kretzschmar <henne@...htwindheim.de>
Signed-off-by: Henrik Kretzschmar <henne@...htwindheim.de>

Better check the video_device pointer before using it.


diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c
index 6f36006..ef153ff 100644
--- a/drivers/media/video/v4l2-dev.c
+++ b/drivers/media/video/v4l2-dev.c
@@ -257,6 +257,9 @@ int video_register_device_index(struct video_device *vfd, int type, int nr,
 	int ret;
 	char *name_base;
 
+	if (vfd == NULL)
+		return -EINVAL;
+
 	switch (type) {
 	case VFL_TYPE_GRABBER:
 		base = MINOR_VFL_TYPE_GRABBER_MIN;


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