3.16.47-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Johan Hovold <johan@xxxxxxxxxx> commit aa58fedb8c7b6cf2f05941d238495f9e2f29655c upstream. Make sure to check the number of endpoints to avoid accessing memory beyond the endpoint array should a device lack the expected endpoints. Note that, as far as I can tell, the gspca framework has already made sure there is at least one endpoint in the current alternate setting so there should be no risk for a NULL-pointer dereference here. Fixes: b517af722860 ("V4L/DVB: gspca_konica: New gspca subdriver for konica chipset using cams") Cc: Hans de Goede <hdegoede@xxxxxxxxxx> Signed-off-by: Johan Hovold <johan@xxxxxxxxxx> Signed-off-by: Hans Verkuil <hansverk@xxxxxxxxx> Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx> Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx> --- drivers/media/usb/gspca/konica.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/media/usb/gspca/konica.c +++ b/drivers/media/usb/gspca/konica.c @@ -188,6 +188,9 @@ static int sd_start(struct gspca_dev *gs return -EIO; } + if (alt->desc.bNumEndpoints < 2) + return -ENODEV; + packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize); n = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv;