linux-kernel - Re: [PATCH] [v2] media: s3c-camif: fix out-of-bounds array access

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Message-ID: <CAK8P3a2vhH+ApKi+S+cN20+N_umY5aJysbxzWpvF=Tvao33CSw@mail.gmail.com>
Date:   Tue, 16 Jan 2018 17:49:13 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Sakari Ailus <sakari.ailus@...ux.intel.com>
Cc:     Sylwester Nawrocki <sylvester.nawrocki@...il.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        "moderated list:ARM/SAMSUNG EXYNOS ARM ARCHITECTURES" 
        <linux-samsung-soc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] [v2] media: s3c-camif: fix out-of-bounds array access

On Tue, Jan 16, 2018 at 4:44 PM, Sakari Ailus
<sakari.ailus@...ux.intel.com> wrote:

>>               if (camif_mbus_formats[i] == mf->code)
>>                       break;
>>
>> +     if (i == ARRAY_SIZE(camif_mbus_formats))
>> +             mf->code = camif_mbus_formats[0];
>> +
>
> Either else here so that the line below is executed only if the condition
> is false, or assign i = 0 above. Otherwise you'll end up with a different
> off-by-one bug. :-)

Oops. Sent v3 now, thanks for the review.

      Arnd