From: Henrik Kretzschmar <henne@nachtwindheim.de>
Date: Wed, 3 Sep 2008 20:11:53 +0000 (-0300)
Subject: V4L/DVB (8750): V4L: check inval in video_register_device_index()
X-Git-Tag: v2.6.27-rc6~37^2~4^2~46
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=f3b9f50ef771670b5d94c568241d6766691c6c18;p=linux-2.6-omap-h63xx.git

V4L/DVB (8750): V4L: check inval in video_register_device_index()

Better check the video_device pointer before using it.

Signed-off-by: Henrik Kretzschmar <henne@nachtwindheim.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---

diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c
index 0320fb84119..155fdec9ac7 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;