Re: [PATCH v10 25/27] x86: enable initial Rust support

[Sami Tolvanen]

On Fri, Oct 14, 2022 at 11:05 AM Miguel Ojeda
<miguel.ojeda.sandonis@xxxxxxxxx> wrote:
>
> On Tue, Oct 11, 2022 at 1:16 AM Sami Tolvanen <samitolvanen@xxxxxxxxxx> wrote:
> >
> > Rust supports IBT with -Z cf-protection=branch, but I don't see this
> > option being enabled in the kernel yet. Cross-language CFI is going to
> > require a lot more work though because the type systems are not quite
> > compatible:
> >
> > https://github.com/rust-lang/rfcs/pull/3296
>
> I have pinged Ramon de C Valle as he is the author of the RFC above
> and implementation work too; since a month or so ago he also leads the
> Exploit Mitigations Project Group in Rust.

Thanks, Miguel. I also talked to Ramon about KCFI earlier this week
and he expressed interest in helping with rustc support for it. In the
meanwhile, I think we can just add a depends on !CFI_CLANG to avoid
issues here.

Sami