linux-kernel - Re: [PATCH -fixes] riscv: Fix BUILTIN

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

Message-ID: <CAK8P3a1TiSNoqUEjTaqPyqnU8d0-p-yZkrsvmXt5fo4Rkfue_w@mail.gmail.com>
Date:   Fri, 4 Jun 2021 15:08:05 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Alexandre Ghiti <alex@...ti.fr>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        DTML <devicetree@...r.kernel.org>,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -fixes] riscv: Fix BUILTIN_DTB for sifive and microchip soc

On Fri, Jun 4, 2021 at 2:06 PM Alexandre Ghiti <alex@...ti.fr> wrote:
>
> Fix BUILTIN_DTB config which resulted in a dtb that was actually not built
> into the Linux image: in the same manner as Canaan soc does, create an object
> file from the dtb file that will get linked into the Linux image.
>
> Signed-off-by: Alexandre Ghiti <alex@...ti.fr>

Along the same lines as the comment that Jisheng Zhang made on the fixed
address, building a dtb into the kernel itself fundamentally breaks generic
kernel images.

I can understand using it on K210, which is extremely limited and wouldn't
run a generic kernel anyway, but for normal platforms like microchip and
sifive, it would be better to disallow CONFIG_BUILTIN_DTB in Kconfig
and require a non-broken boot loader.

      Arnd