usb: gadget: uvc: Prevent buffer overflow in setup handler

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commit 4c92670b16 upstream.

Setup function uvc_function_setup permits control transfer
requests with up to 64 bytes of payload (UVC_MAX_REQUEST_SIZE),
data stage handler for OUT transfer uses memcpy to copy req->actual
bytes to uvc_event->data.data array of size 60. This may result
in an overflow of 4 bytes.

Fixes: cdda479f15 ("USB gadget: video class function driver")
Cc: stable <stable@kernel.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Signed-off-by: Szymon Heidrich <szymon.heidrich@gmail.com>
Link: https://lore.kernel.org/r/20221206141301.51305-1-szymon.heidrich@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Szymon Heidrich 2022-12-06 15:13:01 +01:00 • committed by Greg Kroah-Hartman

parent 9391da5e02

commit 4972e3528b

1 changed files with 3 additions and 2 deletions

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drivers/usb/gadget/function/f_uvc.c

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