linux-kernel - Re: [PATCH] pinctrl: samsung: Validate alias coming from DT

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Message-ID: <CAMuHMdUg-Fj5J7peAWUBc-5qnDc5RSzOg1TxURdEW4g9NrsYsQ@mail.gmail.com>
Date:   Tue, 20 Feb 2018 19:38:07 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Tomasz Figa <tomasz.figa@...il.com>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Kukjin Kim <kgene@...nel.org>,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-gpio@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        stable <stable@...r.kernel.org>
Subject: Re: [PATCH] pinctrl: samsung: Validate alias coming from DT

On Tue, Feb 20, 2018 at 7:17 PM, Krzysztof Kozlowski <krzk@...nel.org> wrote:
> Driver uses alias from Device Tree as an index of pin controller data
> array.  In case of a wrong DTB or an out-of-tree DTB, the alias could be
> outside of this data array leading to out-of-bounds access.
>
> Depending on binary and memory layout, this could be handled properly
> (showing error like "samsung-pinctrl 3860000.pinctrl: driver data not
> available") or could lead to exceptions.
>
> Reported-by: Geert Uytterhoeven <geert@...ux-m68k.org>
> Cc: <stable@...r.kernel.org>
> Fixes: 30574f0db1b1 ("pinctrl: add samsung pinctrl and gpiolib driver")
> Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>

Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds