linux-kernel - Re: [PATCH v2] media: uvcvideo: Fix OOB read

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Message-ID: <ZMEi8jf0gjR57Vjw@google.com>
Date:   Wed, 26 Jul 2023 06:43:14 -0700
From:   Zubin Mithra <zsm@...omium.org>
To:     Thorsten Leemhuis <linux@...mhuis.info>
Cc:     Ricardo Ribalda <ribalda@...omium.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        stable@...nel.org,
        Kai Wasserbäch <kai@....carbon-project.org>
Subject: Re: [PATCH v2] media: uvcvideo: Fix OOB read

On Wed, Jul 26, 2023 at 10:47:46AM +0200, Thorsten Leemhuis wrote:
> On 26.07.23 10:38, Ricardo Ribalda wrote:
> > On Wed, 26 Jul 2023 at 10:33, Thorsten Leemhuis <linux@...mhuis.info> wrote:
> >> On 26.07.23 10:07, Laurent Pinchart wrote:
> >>> (CC'ing Kai and Thorsten who have added the check to checkpatch)
> >>>
> >>> On Wed, Jul 26, 2023 at 08:24:50AM +0200, Ricardo Ribalda wrote:
> >>>> On Tue, 25 Jul 2023 at 23:34, Laurent Pinchart wrote:
> >>>>> On Thu, Jul 20, 2023 at 05:46:54PM +0000, Ricardo Ribalda wrote:
> >>>>>> If the index provided by the user is bigger than the mask size, we might do an
> >>>>>> out of bound read.
> >>>>>>
> >>>>>> CC: stable@...nel.org
> >>>>>> Fixes: 40140eda661e ("media: uvcvideo: Implement mask for V4L2_CTRL_TYPE_MENU")
> >>>>>> Reported-by: Zubin Mithra <zsm@...omium.org>
> >>>>>
> >>>>> checkpatch now requests a Reported-by tag to be immediately followed by
> >>>>> a Closes
> >>
> >> Not that it matters, the changes I performed only required a Link: tag,
> >> which is how things should have been done for many years already. It
> >> later became Closes: due to patches from Matthieu. But whatever. :-D
> > 
> > I prefer to leave the Reported-by and remove the Closes, that way we
> > credit the reporter (assuming they approved to be referred).
> > 
> > But if that is not possible, just remove the reported-by. A private
> > link is pretty much noise on the tree.
> 
> Yeah, of course that's the right strategy (Linus made it pretty clear
> that he doesn't want any private links) in case the reporter okay with
> the Reported-by. Sorry, forgot to cover that case in my reply.
> 

I don't have a preference either way. Please feel free to remove the
reported-by tag.

Thanks,
- Zubin

> Ciao, Thorsten