linux-kernel - Re: [PATCH 2/2] rust: cfi: add support for CFI

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: <CABCJKuf+=bxrZphtFZ+N_t2whCS0gx2GVHybTzcNmY6TX6c7cw@mail.gmail.com>
Date: Tue, 30 Jul 2024 08:24:15 -0700
From: Sami Tolvanen <samitolvanen@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>
Cc: Alice Ryhl <aliceryhl@...gle.com>, Masahiro Yamada <masahiroy@...nel.org>, 
	Nathan Chancellor <nathan@...nel.org>, Nicolas Schier <nicolas@...sle.eu>, Miguel Ojeda <ojeda@...nel.org>, 
	Kees Cook <kees@...nel.org>, Alex Gaynor <alex.gaynor@...il.com>, 
	Wedson Almeida Filho <wedsonaf@...il.com>, Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>, 
	Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
	Benno Lossin <benno.lossin@...ton.me>, Andreas Hindborg <a.hindborg@...sung.com>, 
	Matthew Maurer <mmaurer@...gle.com>, linux-kbuild@...r.kernel.org, 
	linux-kernel@...r.kernel.org, rust-for-linux@...r.kernel.org
Subject: Re: [PATCH 2/2] rust: cfi: add support for CFI_CLANG with Rust

On Tue, Jul 30, 2024 at 3:32 AM Peter Zijlstra <peterz@...radead.org> wrote:
>
> On Tue, Jul 30, 2024 at 09:40:12AM +0000, Alice Ryhl wrote:
> > From: Matthew Maurer <mmaurer@...gle.com>
> >
> > Make it possible to use the Control Flow Integrity (CFI) sanitizer when
> > Rust is enabled. Enabling CFI with Rust requires that CFI is configured
> > to normalize integer types so that all integer types of the same size
> > and signedness are compatible under CFI.
>
> I am assuming -- because I have to, because you're not actually saying
> anyting -- that this is fully compatible with the C version and all the
> fun and games we play with rewriting the function prologue for FineIBT
> and the like also work?

Rust uses the same LLVM backend for the actual code generation, so it
should be fully compatible.

Sami