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(parent: 40e2ac0) | patch
USB: gadget: detect too-big endpoint 0 requests
authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 9 Dec 2021 17:59:27 +0000 (18:59 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 14 Dec 2021 09:16:56 +0000 (10:16 +0100)
commite7c8afee149134b438df153b09af7fd928a8bc24
tree33201be443e9adddec2d631b59933cf5ebf002aetree | snapshot (tar.gz zip)
parent40e2ac0dec916da31f14a182579f7423524eb490commit | diff
USB: gadget: detect too-big endpoint 0 requests

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>
drivers/usb/gadget/composite.c diff | blob | blame | history
drivers/usb/gadget/legacy/dbgp.c diff | blob | blame | history
drivers/usb/gadget/legacy/inode.c diff | blob | blame | history