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From: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Date: Thu, 4 Apr 2024 16:33:08 +0200
Message-ID: <CANiq72m9YAu=dr1=WMSHOqfpszj4S6OkMEQ05vqbv_zKO5pOsg@mail.gmail.com>
Subject: Re: [PATCH v3] rust: make mutually exclusive with CFI_CLANG
To: Conor Dooley <conor@kernel.org>
Cc: linux-riscv@lists.infradead.org, Conor Dooley <conor.dooley@microchip.com>, 
	stable@vger.kernel.org, Miguel Ojeda <ojeda@kernel.org>, 
	Alex Gaynor <alex.gaynor@gmail.com>, Wedson Almeida Filho <wedsonaf@gmail.com>, linux-kernel@vger.kernel.org, 
	rust-for-linux@vger.kernel.org, Sami Tolvanen <samitolvanen@google.com>, 
	Kees Cook <keescook@chromium.org>, Nathan Chancellor <nathan@kernel.org>, llvm@lists.linux.dev, 
	Matthew Maurer <mmaurer@google.com>, Ramon de C Valle <rcvalle@google.com>
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On Thu, Apr 4, 2024 at 4:17=E2=80=AFPM Conor Dooley <conor@kernel.org> wrot=
e:
>
> From: Conor Dooley <conor.dooley@microchip.com>
>
> On RISC-V and arm64, and presumably x86, if CFI_CLANG is enabled,
> loading a rust module will trigger a kernel panic. Support for
> sanitisers, including kcfi (CFI_CLANG), is in the works, but for now
> they're nightly-only options in rustc. Make RUST depend on !CFI_CLANG
> to prevent configuring a kernel without symmetrical support for kfi.
>
> Fixes: 2f7ab1267dc9 ("Kbuild: add Rust support")
> cc: stable@vger.kernel.org
> Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
> ---
> Sending this one on its own, there's no explicit dep on this for the
> riscv enabling patch, v3 to continue the numbering from there. Nothing
> has changed since v2.
>
> CC: Miguel Ojeda <ojeda@kernel.org>
> CC: Alex Gaynor <alex.gaynor@gmail.com>
> CC: Wedson Almeida Filho <wedsonaf@gmail.com>
> CC: linux-kernel@vger.kernel.org (open list)
> CC: rust-for-linux@vger.kernel.org
> CC: Sami Tolvanen <samitolvanen@google.com>
> CC: Kees Cook <keescook@chromium.org>
> CC: Nathan Chancellor <nathan@kernel.org>
> CC: llvm@lists.linux.dev

Cc'ing Matthew & Ramon as well so that they are aware and in case they
want to comment.

Cheers,
Miguel