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From:   Benjamin Gaignard <benjamin.gaignard@linaro.org>
Date:   Sat, 7 Jul 2018 13:28:01 +0200
Message-ID: <CA+M3ks7URGgxKfjkB9H2vi0qH-SvMZd1SfK4KZGPbF81+xJR9g@mail.gmail.com>
Subject: Re: [PATCH] dma: stm32: replace "%p" with "%pK"
To:     Geert Uytterhoeven <geert@linux-m68k.org>
Cc:     vkoul@kernel.org, Dan Williams <dan.j.williams@intel.com>,
        Maxime Coquelin <mcoquelin.stm32@gmail.com>,
        Alexandre Torgue <alexandre.torgue@st.com>,
        dmaengine@vger.kernel.org,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        Benjamin Gaignard <benjamin.gaignard@st.com>
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2018-07-06 21:38 GMT+02:00 Geert Uytterhoeven <geert@linux-m68k.org>:
> Hi Benjamin,
>
> On Fri, Jul 6, 2018 at 3:03 PM Benjamin Gaignard
> <benjamin.gaignard@linaro.org> wrote:
>> The format specifier "%p" can leak kernel addresses.
>> Use "%pK" instead.
>
> Still? Isn't the value randomized these days?

%p give an hashed value, with %pK you can use a sysctl to get the real
value if you are root

>
> Gr{oetje,eeting}s,
>
>                         Geert
>
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m6=
8k.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


--=20
Benjamin Gaignard

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