From: Steven Toth Date: Sat, 15 Sep 2007 16:28:26 +0000 (-0400) Subject: V4L: cx88: Avoid a NULL pointer dereference during mpeg_open() X-Git-Tag: v2.6.22.9~36 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=5f9ce2fc33a51fb6ff9e6e484d4673329c935aba;p=karo-tx-linux.git V4L: cx88: Avoid a NULL pointer dereference during mpeg_open() (cherry picked from commit 48200baeab95fd39a7f4c4f3536c7142a64ac335) [PATCH] V4L: cx88: 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 Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Michael Krufky Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/media/video/cx88/cx88-mpeg.c b/drivers/media/video/cx88/cx88-mpeg.c index 543b05ebc0e7..c36e2b7172e9 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; }