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(parent: ef472b0) | 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 09:57:19 +0000 (10:57 +0100)
commit36dfdf11af49d3c009c711fb16f5c6e7a274505d
treeb34645895d454d4499dce2d350c537e2fb459202tree | snapshot
parentef472b023b85e46bc9af08c1c91ab151fe886e35commit | 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 | history
drivers/usb/gadget/legacy/dbgp.c diff | blob | history
drivers/usb/gadget/legacy/inode.c diff | blob | history
Domain: System / Kernel;