linux-kernel - Re: [PATCH 5.10 527/717] media: ipu3-cio2: Validate mbus format in setting subdev format

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Message-ID: <X+x2OakYZ5GGCxuS@pendragon.ideasonboard.com>
Date:   Wed, 30 Dec 2020 14:44:41 +0200
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Pavel Machek <pavel@...x.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Stable <stable@...r.kernel.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Subject: Re: [PATCH 5.10 527/717] media: ipu3-cio2: Validate mbus format in
 setting subdev format

On Wed, Dec 30, 2020 at 02:32:46PM +0200, Andy Shevchenko wrote:
> On Wed, Dec 30, 2020 at 2:25 PM Pavel Machek wrote:
> 
> > > commit a86cf9b29e8b12811cf53c4970eefe0c1d290476 upstream.
> > >
> > > Validate media bus code, width and height when setting the subdev format.
> > >
> > > This effectively reworks how setting subdev format is implemented in the
> > > driver.
> >
> > Something is wrong here:
> >
> > > +     fmt->format.code = formats[0].mbus_code;
> > > +     for (i = 0; i < ARRAY_SIZE(formats); i++) {
> 
> Looks like 'i = 1' should be...
> 
> > > +             if (formats[i].mbus_code == fmt->format.code) {

More likely

			if (formats[i].mbus_code == mbus_code) {

I think.

Pavel, would you like to submit a patch ?

> > > +                     fmt->format.code = mbus_code;
> > > +                     break;
> > > +             }
> >
> > This does not make sense. Loop will always exit during the first
> > iteration, making the whole loop crazy/redundant.

-- 
Regards,

Laurent Pinchart