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USB: adutux: fix interface sanity check

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Make sure to use the current alternate setting when verifying the
interface descriptors to avoid binding to an invalid interface.

Failing to do so could cause the driver to misbehave or trigger a WARN()
in usb_submit_urb() that kernels with panic_on_warn set would choke on.

Fixes: 03270634e2 ("USB: Add ADU support for Ontrak ADU devices")
Cc: stable <stable@vger.kernel.org>     # 2.6.19
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191210112601.3561-3-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2019-12-10 12:25:59 +01:00 committed by Greg Kroah-Hartman
parent 59920635b8
commit 3c11c4bed0
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/misc/adutux.c
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@ -669,7 +669,7 @@ static int adu_probe(struct usb_interface *interface,
init_waitqueue_head(&dev->read_wait);
init_waitqueue_head(&dev->write_wait);
res = usb_find_common_endpoints_reverse(&interface->altsetting[0],
res = usb_find_common_endpoints_reverse(interface->cur_altsetting,
NULL, NULL,
&dev->interrupt_in_endpoint,
&dev->interrupt_out_endpoint);