linux-kernel - Re: [PATCH] Prevent buffer overflow in UVC Gadget setup handler

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Message-ID: <Y4ieBScmqVbZMrf9@kroah.com>
Date:   Thu, 1 Dec 2022 13:28:53 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Szymon Heidrich <szymon.heidrich@...il.com>
Cc:     laurent.pinchart@...asonboard.com, Felipe Balbi <balbi@...nel.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Prevent buffer overflow in UVC Gadget setup handler

On Thu, Dec 01, 2022 at 01:21:41PM +0100, Szymon Heidrich wrote:
> 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.
> 
> Signed-off-by: Szymon Heidrich <szymon.heidrich@...il.com>
> ---
>  drivers/usb/gadget/function/f_uvc.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)

What commit id does this fix?  Is it needed for stable kernels?

thanks,

greg k-h