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staging: gigaset: add endpoint-type sanity check 

commit ed9ed5a89a upstream.

Add missing endpoint-type sanity checks to probe.

This specifically prevents a warning in USB core on URB submission when
fuzzing USB descriptors.

Signed-off-by: Johan Hovold <johan@kernel.org>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20191202085610.12719-4-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Johan Hovold 2019-12-02 09:56:10 +01:00 committed by Greg Kroah-Hartman
parent da64ea560a
commit 661cf020ae
1 changed files with 12 additions and 0 deletions
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12
drivers/staging/isdn/gigaset/usb-gigaset.c
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@ -705,6 +705,12 @@ static int gigaset_probe(struct usb_interface *interface,
endpoint = &hostif->endpoint[0].desc;
if (!usb_endpoint_is_bulk_out(endpoint)) {
dev_err(&interface->dev, "missing bulk-out endpoint\n");
retval = -ENODEV;
goto error;
}
buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
ucs->bulk_out_size = buffer_size;
ucs->bulk_out_epnum = usb_endpoint_num(endpoint);
@ -724,6 +730,12 @@ static int gigaset_probe(struct usb_interface *interface,
endpoint = &hostif->endpoint[1].desc;
if (!usb_endpoint_is_int_in(endpoint)) {
dev_err(&interface->dev, "missing int-in endpoint\n");
retval = -ENODEV;
goto error;
}
ucs->busy = 0;
ucs->read_urb = usb_alloc_urb(0, GFP_KERNEL);