From: Steven Toth <stoth@hauppauge.com>
Date: Fri, 7 Sep 2007 01:48:35 +0000 (-0300)
Subject: V4L/DVB (6188): Avoid a NULL pointer dereference during mpeg_open()
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=48200baeab95fd39a7f4c4f3536c7142a64ac335;p=deliverable%2Flinux.git

V4L/DVB (6188): Avoid a NULL pointer dereference during mpeg_open()

Bug: With a hardware encoder board installed as cx88[1] and a
non-encoder boards installed as cx88[0], an OOPS is generated
during cx8802_get_device() called from mpeg_open().

Signed-off-by: Steven Toth <stoth@hauppauge.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
---

diff --git a/drivers/media/video/cx88/cx88-mpeg.c b/drivers/media/video/cx88/cx88-mpeg.c
index 317a2a3f9cc1..da7a6b591a67 100644
--- a/drivers/media/video/cx88/cx88-mpeg.c
+++ b/drivers/media/video/cx88/cx88-mpeg.c
@@ -580,7 +580,7 @@ struct cx8802_dev * cx8802_get_device(struct inode *inode)
 
 	list_for_each(list,&cx8802_devlist) {
 		h = list_entry(list, struct cx8802_dev, devlist);
-		if (h->mpeg_dev->minor == minor)
+		if (h->mpeg_dev && h->mpeg_dev->minor == minor)
 			return h;
 	}