tree 8ad530de10635ce84248000e27b7d012bfcc921e
parent 2c5cb5c8ad1c4f8165d7ee0f5535b7e6aea81f47
author Johan Hovold <johan@kernel.org> 1575978264 +0100
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1580907939 +0000

rtl8xxxu: fix interface sanity check

commit 39a4281c312f2d226c710bc656ce380c621a2b16 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: 26f1fad29ad9 ("New driver: rtl8xxxu (mac80211)")
Cc: stable <stable@vger.kernel.org>     # 4.4
Cc: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>