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USB: adutux: fix interface sanity check

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commit 3c11c4bed02b202e278c0f5c319ae435d7fb9815 upstream.

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: 03270634e242 ("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 1e63d9a793
commit 72e96b95be
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/misc/adutux.c
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@ -685,7 +685,7 @@ static int adu_probe(struct usb_interface *interface,
init_waitqueue_head(&dev->read_wait);
init_waitqueue_head(&dev->write_wait);
iface_desc = &interface->altsetting[0];
iface_desc = &interface->cur_altsetting[0];
/* set up the endpoint information */
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {