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media: usbtv: fix control-message timeouts

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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>
This commit is contained in:
Johan Hovold 2020-01-13 18:18:18 +01:00 committed by prashantpaddune
parent 37dba5ffd1
commit 52a95d4d3e
1 changed files with 1 additions and 1 deletions
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2
drivers/media/usb/usbtv/usbtv-core.c
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@ -42,7 +42,7 @@ int usbtv_set_regs(struct usbtv *usbtv, const u16 regs[][2], int size)
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;
}