iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[media] cx231xx-cards: fix NULL-deref on missing association descriptor

Browse Source 
Make sure to check that we actually have an Interface Association
Descriptor before dereferencing it during probe to avoid dereferencing a
NULL-pointer.

Fixes: e0d3bafd0258 ("V4L/DVB (10954): Add cx231xx USB driver")

Cc: stable <stable@vger.kernel.org>     # 2.6.30
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Johan Hovold 2017-09-21 05:40:18 -03:00 committed by Mauro Carvalho Chehab
parent d17dd2db94
commit 6c3b047fa2
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/media/usb/cx231xx/cx231xx-cards.c
View File

@ -1684,7 +1684,7 @@ static int cx231xx_usb_probe(struct usb_interface *interface,
nr = dev->devno;
assoc_desc = udev->actconfig->intf_assoc[0];
if (assoc_desc->bFirstInterface != ifnum) {
if (!assoc_desc || assoc_desc->bFirstInterface != ifnum) {
dev_err(d, "Not found matching IAD interface\n");
retval = -ENODEV;
goto err_if;