linux-hardening - Re: [PATCH] Compiler Attributes: Add __kcfi

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Message-ID: <CANiq72k6ggtS-TCnws0xY8K-w=+vjGSjaXR-OO5YG=DGAjnsug@mail.gmail.com>
Date: Sun, 20 Jul 2025 22:12:29 +0200
From: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To: Sami Tolvanen <samitolvanen@...gle.com>
Cc: Kees Cook <kees@...nel.org>, Bill Wendling <morbo@...gle.com>, 
	Andrew Cooper <andrew.cooper3@...rix.com>, Arnd Bergmann <arnd@...db.de>, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Miguel Ojeda <ojeda@...nel.org>, 
	Nathan Chancellor <nathan@...nel.org>, Nick Desaulniers <nick.desaulniers+lkml@...il.com>, 
	Justin Stitt <justinstitt@...gle.com>, llvm@...ts.linux.dev, linux-kernel@...r.kernel.org, 
	linux-hardening@...r.kernel.org
Subject: Re: [PATCH] Compiler Attributes: Add __kcfi_salt

On Thu, Jul 17, 2025 at 6:48 PM Sami Tolvanen <samitolvanen@...gle.com> wrote:
>
> I would definitely like to see Rust support for this too. Otherwise,
> we would have to drop the attribute when Rust is enabled to avoid CFI
> type mismatches with C code.

Thanks for confirming -- added then to:

    https://github.com/Rust-for-Linux/linux/issues/354

I will ask upstream when it lands in LLVM.

Cheers,
Miguel