This is a note to let you know that I've just added the patch titled usb: gadget: uvc: Prevent buffer overflow in setup handler to the 5.10-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: usb-gadget-uvc-prevent-buffer-overflow-in-setup-handler.patch and it can be found in the queue-5.10 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 4c92670b16727365699fe4b19ed32013bab2c107 Mon Sep 17 00:00:00 2001 From: Szymon Heidrich <szymon.heidrich@xxxxxxxxx> Date: Tue, 6 Dec 2022 15:13:01 +0100 Subject: usb: gadget: uvc: Prevent buffer overflow in setup handler From: Szymon Heidrich <szymon.heidrich@xxxxxxxxx> commit 4c92670b16727365699fe4b19ed32013bab2c107 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: cdda479f15cd ("USB gadget: video class function driver") Cc: stable <stable@xxxxxxxxxx> Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> Reviewed-by: Daniel Scally <dan.scally@xxxxxxxxxxxxxxxx> Signed-off-by: Szymon Heidrich <szymon.heidrich@xxxxxxxxx> Link: https://lore.kernel.org/r/20221206141301.51305-1-szymon.heidrich@xxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/usb/gadget/function/f_uvc.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) --- a/drivers/usb/gadget/function/f_uvc.c +++ b/drivers/usb/gadget/function/f_uvc.c @@ -213,8 +213,9 @@ uvc_function_ep0_complete(struct usb_ep memset(&v4l2_event, 0, sizeof(v4l2_event)); v4l2_event.type = UVC_EVENT_DATA; - uvc_event->data.length = req->actual; - memcpy(&uvc_event->data.data, req->buf, req->actual); + uvc_event->data.length = min_t(unsigned int, req->actual, + sizeof(uvc_event->data.data)); + memcpy(&uvc_event->data.data, req->buf, uvc_event->data.length); v4l2_event_queue(&uvc->vdev, &v4l2_event); } } Patches currently in stable-queue which might be from szymon.heidrich@xxxxxxxxx are queue-5.10/usb-gadget-uvc-prevent-buffer-overflow-in-setup-handler.patch