Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

V4L/DVB (11711): gspca - main: Fix a crash when no bandwidth available

Browse source 
When the bandwidth is not wide enough, the transfer endpoint may be set to
the one of the alternate setting 0. This one may be null and this causes a
divide by 0 oops.

Reported-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Jean-Francois Moine 2009-04-21 13:57:31 -03:00 • committed by Mauro Carvalho Chehab
parent 6929dc6b30
commit 30d35e4950
1 changed files with 2 additions and 1 deletions

3
drivers/media/video/gspca/gspca.c
View file

@ -449,7 +449,8 @@ static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
for (i = 0; i < alt->desc.bNumEndpoints; i++) {
ep = &alt->endpoint[i];
attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
if (attr == xfer)
if (attr == xfer
&& ep->desc.wMaxPacketSize != 0)
return ep;
}
return NULL;