linux-kernel - Re: [WIP 1/3] rust: Introduce atomic module

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]

Date: Fri, 22 Mar 2024 17:03:11 -0700
From: Boqun Feng <boqun.feng@...il.com>
To: Andrew Lunn <andrew@...n.ch>
Cc: rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org, llvm@...ts.linux.dev,
	Miguel Ojeda <ojeda@...nel.org>,	Alex Gaynor <alex.gaynor@...il.com>,
	Wedson Almeida Filho <wedsonaf@...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>,
	Alice Ryhl <aliceryhl@...gle.com>,
	Alan Stern <stern@...land.harvard.edu>,
	Andrea Parri <parri.andrea@...il.com>,	Will Deacon <will@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Nicholas Piggin <npiggin@...il.com>,	David Howells <dhowells@...hat.com>,
	Jade Alglave <j.alglave@....ac.uk>,	Luc Maranget <luc.maranget@...ia.fr>,
	"Paul E. McKenney" <paulmck@...nel.org>,
	Akira Yokosawa <akiyks@...il.com>,	Daniel Lustig <dlustig@...dia.com>,
	Joel Fernandes <joel@...lfernandes.org>,
	Nathan Chancellor <nathan@...nel.org>,
	Nick Desaulniers <ndesaulniers@...gle.com>,	kent.overstreet@...il.com,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, elver@...gle.com,
	Mark Rutland <mark.rutland@....com>,
	Thomas Gleixner <tglx@...utronix.de>,	Ingo Molnar <mingo@...hat.com>,
 Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
	"H. Peter Anvin" <hpa@...or.com>,
	Catalin Marinas <catalin.marinas@....com>,	torvalds@...ux-foundation.org,
 linux-arm-kernel@...ts.infradead.org,	linux-fsdevel@...r.kernel.org
Subject: Re: [WIP 1/3] rust: Introduce atomic module

On Sat, Mar 23, 2024 at 12:52:08AM +0100, Andrew Lunn wrote:
> > +//! These primitives should have the same semantics as their C counterparts, for precise definitions
> > +//! of the semantics, please refer to tools/memory-model. Note that Linux Kernel Memory
> > +//! (Consistency) Model is the only model for Rust development in kernel right now, please avoid to
> > +//! use Rust's own atomics.
> 
> Is it possible to somehow poison rusts own atomics?  I would not be

I can continue to look an elegant way, now since we compile our own
`core` crate (where Rust atomic library locates), we can certain do a
sed trick to exclude the atomic code from Rust. It's pretty hacky, but
maybe others know how to teach linter to help.

Regards,
Boqun

> too surprised if somebody with good Rust knowledge but new to the
> kernel tries using Rusts atomics. Either getting the compiler to fail
> the build, or it throws an Opps on first invocation would be good.
> 
>     Andrew