From: Johan Hovold johan@kernel.org
commit 536f561d871c5781bc33d26d415685211b94032e upstream.
The driver was issuing synchronous uninterruptible control requests without using a timeout. This could lead to the driver hanging on various user requests due to a malfunctioning (or malicious) device until the device is physically disconnected.
The USB upper limit of five seconds per request should be more than enough.
Fixes: f3d27f34fdd7 ("[media] usbtv: Add driver for Fushicai USBTV007 video frame grabber") Fixes: c53a846c48f2 ("[media] usbtv: add video controls") Cc: stable stable@vger.kernel.org # 3.11 Signed-off-by: Johan Hovold johan@kernel.org Acked-by: Lubomir Rintel lkundrak@v3.sk Reviewed-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/media/usb/usbtv/usbtv-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/media/usb/usbtv/usbtv-core.c +++ b/drivers/media/usb/usbtv/usbtv-core.c @@ -42,7 +42,7 @@ int usbtv_set_regs(struct usbtv *usbtv,
ret = usb_control_msg(usbtv->udev, pipe, USBTV_REQUEST_REG, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, - value, index, NULL, 0, 0); + value, index, NULL, 0, USB_CTRL_GET_TIMEOUT); if (ret < 0) return ret; }