From: Peter Zijlstra <peterz@infradead.org>
To: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Cc: "Alice Ryhl" <aliceryhl@google.com>,
"Paweł Anikiel" <panikiel@google.com>,
"Sami Tolvanen" <samitolvanen@google.com>,
"Kees Cook" <kees@kernel.org>,
"Alex Gaynor" <alex.gaynor@gmail.com>,
"Borislav Petkov" <bp@alien8.de>,
"Dave Hansen" <dave.hansen@linux.intel.com>,
"Ingo Molnar" <mingo@redhat.com>,
"Josh Poimboeuf" <jpoimboe@kernel.org>,
"Masahiro Yamada" <masahiroy@kernel.org>,
"Miguel Ojeda" <ojeda@kernel.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Nathan Chancellor" <nathan@kernel.org>,
x86@kernel.org, linux-kernel@vger.kernel.org,
rust-for-linux@vger.kernel.org,
"Matthew Maurer" <mmaurer@google.com>,
"Ramon de C Valle" <rcvalle@google.com>
Subject: Re: [PATCH] x86/Kconfig: make CFI_AUTO_DEFAULT depend on !RUST
Date: Wed, 16 Apr 2025 22:20:40 +0200 [thread overview]
Message-ID: <20250416202040.GD38216@noisy.programming.kicks-ass.net> (raw)
In-Reply-To: <CANiq72k0AM3v9JZe=8mDN6T1ToiAt1-1e1zJ3z0Oh6ZWfchzag@mail.gmail.com>
On Tue, Apr 15, 2025 at 05:15:31PM +0200, Miguel Ojeda wrote:
> On Thu, Apr 10, 2025 at 4:00 PM Alice Ryhl <aliceryhl@google.com> wrote:
> >
> > I submitted a PR that I believe should fix it:
> > https://github.com/rust-lang/rust/pull/139632
>
> This landed, scheduled for Rust 1.88 (2025-06-26) if all goes well.
>
> Peter: are you OK with landing a patch like this? Well, modified to
> look like this now that we know the version:
>
> depends on FINEIBT
> depends on !RUST || RUSTC_VERSION >= 108800
>
> (assuming we confirm the nightly build works properly)
I don't much like it -- disabling FineIBT at config time like this also
kills the CFI type rehash. Not to mention that FineIBT is a Spectre-BHI
mitigation, esp. with that arity thing on top.
I don't suppose we can simply mandate this rust version?
Speaking of which, I should go install this latest rust thing....
next prev parent reply other threads:[~2025-04-16 20:20 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-10 11:54 [PATCH] x86/Kconfig: make CFI_AUTO_DEFAULT depend on !RUST Paweł Anikiel
2025-04-10 12:36 ` Peter Zijlstra
2025-04-10 12:45 ` Peter Zijlstra
2025-04-10 13:09 ` Peter Zijlstra
2025-04-10 13:18 ` Paweł Anikiel
2025-04-10 13:20 ` Alice Ryhl
2025-04-10 13:21 ` Miguel Ojeda
2025-04-10 13:26 ` Peter Zijlstra
2025-04-10 13:27 ` Miguel Ojeda
2025-04-10 13:34 ` Peter Zijlstra
2025-04-10 13:54 ` Miguel Ojeda
2025-04-10 13:57 ` Peter Zijlstra
2025-04-10 14:05 ` Miguel Ojeda
2025-04-10 14:15 ` Peter Zijlstra
2025-04-10 15:04 ` Alice Ryhl
2025-04-10 13:59 ` Alice Ryhl
2025-04-10 14:08 ` Peter Zijlstra
2025-04-10 14:54 ` Miguel Ojeda
2025-04-10 15:14 ` Peter Zijlstra
2025-04-10 18:01 ` Miguel Ojeda
2025-04-10 15:02 ` Alice Ryhl
2025-04-15 15:15 ` Miguel Ojeda
2025-04-16 10:38 ` Alice Ryhl
2025-04-16 20:20 ` Peter Zijlstra [this message]
2025-04-16 21:51 ` Kees Cook
2025-04-17 8:18 ` Peter Zijlstra
2025-04-17 18:40 ` Miguel Ojeda
2025-04-18 9:45 ` Peter Zijlstra
2025-05-06 22:19 ` Miguel Ojeda
2025-05-09 8:46 ` Alice Ryhl
2025-05-09 9:04 ` Miguel Ojeda
2025-05-09 9:11 ` Paweł Anikiel
2025-05-09 9:39 ` Alice Ryhl
2025-05-09 16:34 ` Kees Cook
2025-05-09 19:33 ` Miguel Ojeda
2025-04-10 13:12 ` Paweł Anikiel
2025-04-10 13:25 ` Peter Zijlstra
2025-04-10 15:45 ` [PATCH] objtool: Detect __nocfi calls Peter Zijlstra
2025-04-10 19:09 ` Josh Poimboeuf
2025-04-11 6:46 ` Peter Zijlstra
2025-04-10 19:32 ` Miguel Ojeda
2025-04-10 19:43 ` Sami Tolvanen
2025-04-11 6:44 ` Peter Zijlstra
2025-04-12 12:31 ` Peter Zijlstra
2025-04-10 13:50 ` [PATCH] x86/Kconfig: make CFI_AUTO_DEFAULT depend on !RUST Miguel Ojeda
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