USB: gadget: detect too-big endpoint 0 requests

USB: gadget: detect too-big endpoint 0 requests

Origin: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit?id=36dfdf11af49d3c009c711fb16f5c6e7a274505d
Bug-Debian-Security: https://security-tracker.debian.org/tracker/CVE-2021-39685

commit 153a2d7e3350cc89d406ba2d35be8793a64c2038 upstream.

Sometimes USB hosts can ask for buffers that are too large from endpoint
0, which should not be allowed.  If this happens for OUT requests, stall
the endpoint, but for IN requests, trim the request size to the endpoint
buffer size.

Co-developed-by: Szymon Heidrich <szymon.heidrich@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Gbp-Pq: Topic bugfix/all
Gbp-Pq: Name USB-gadget-detect-too-big-endpoint-0-requests.patch