linux-kernel - Re: [PATCH] pinctrl: stm32: prevent the use of the secure protected pins

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Thu, 5 May 2022 00:04:26 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Fabien Dessenne <fabien.dessenne@...s.st.com>
Cc:     Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        linux-gpio@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] pinctrl: stm32: prevent the use of the secure protected pins

On Mon, May 2, 2022 at 5:31 PM Fabien Dessenne
<fabien.dessenne@...s.st.com> wrote:

> The hardware denies any access from the Linux non-secure world to the
> secure-protected pins. Hence, prevent any driver to request such a pin.
>
> Mark the secure-protected GPIO lines as invalid (.init_valid_mask) and
> prevent the pinmux request / pinconf setting operations.
> Identify the secure pins with "NO ACCESS" in the pinconf sysfs.
>
> Signed-off-by: Fabien Dessenne <fabien.dessenne@...s.st.com>

Patch applied!

Yours,
Linus Walleij