Re: [PATCH] x86/Kconfig: make CFI_AUTO_DEFAULT depend on !RUST

[Alice Ryhl]

On Thu, Apr 10, 2025 at 3:34 PM Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
>
> On Thu, Apr 10, 2025 at 03:27:55PM +0200, Miguel Ojeda wrote:
> > On Thu, Apr 10, 2025 at 3:26 PM Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
> > >
> > > New compiler can't build old core?
> >
> > No, that is not intended to work -- `core` is tied to the compiler.
>
> OMFG, you just gave me another reason to hate on this rust-bucket of a
> language :-/ What language can't even build an old version of its own
> runtime :-(

I don't think there's anything unreasonable about having a place to
put logic that depends on compiler internals.

> Anyway, given this core nonsense is now CFI unsound, it is no longer
> suitable to build the kernel. So either refrain from using part of the
> core that trips this, or get it fixed asap.

I submitted a PR that I believe should fix it:
https://github.com/rust-lang/rust/pull/139632

Alice