linux-hardening - Re: [RFC/RFT,V2 0/3] Add compiler support for Kernel Control Flow Integrity

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Date:   Wed, 19 Jul 2023 16:20:55 +0800
From:   Dan Li <ashimida.1990@...il.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     Qing Zhao <qing.zhao@...cle.com>, gcc-patches@....gnu.org,
        Richard Sandiford <richard.sandiford@....com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Sami Tolvanen <samitolvanen@...gle.com>,
        Nathan Chancellor <nathan@...nel.org>,
        Tom Rix <trix@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Josh Poimboeuf <jpoimboe@...nel.org>,
        Frederic Weisbecker <frederic@...nel.org>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Marco Elver <elver@...gle.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Song Liu <song@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Uros Bizjak <ubizjak@...il.com>,
        Kumar Kartikeya Dwivedi <memxor@...il.com>,
        Juergen Gross <jgross@...e.com>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Borislav Petkov <bp@...e.de>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Aaron Tomlin <atomlin@...hat.com>,
        Kalesh Singh <kaleshsingh@...gle.com>,
        Yuntao Wang <ytcoode@...il.com>,
        Changbin Du <changbin.du@...el.com>,
        linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, llvm@...ts.linux.dev,
        linux-hardening@...r.kernel.org
Subject: Re: [RFC/RFT,V2 0/3] Add compiler support for Kernel Control Flow Integrity

Hi Kees,

Sincerely sorry, I just saw this email.
Embarrassingly, due to another job change, my plan was postponed again :(.

I may not be able to attend this year's GCC meeting. Is there any other
way to let this get some traction in GCC? I really hope someone can help
with this topic.

BTW, I'm still looking at this and plan to finish it by the end of this
year, but it's taking too long and there's a lot of uncertainty, so
please just consider this only as a backup option.

Thanks,
Dan.

On Thu, 22 Jun 2023 at 05:54, Kees Cook <keescook@...omium.org> wrote:
>
> On Sat, Mar 25, 2023 at 01:11:14AM -0700, Dan Li wrote:
> > This series of patches is mainly used to support the control flow
> > integrity protection of the linux kernel [1], which is similar to
> > -fsanitize=kcfi in clang 16.0 [2,3].
> >
> > Any suggestion please let me know :).
>
> Hi Dan,
>
> It's been a couple months, and I didn't see any other feedback on this
> proposal. I was curious what the status of this work is. Are you able to
> attend GNU Cauldron[1] this year? I'd love to see this get some traction
> in GCC.
>
> Thanks!
>
> -Kees
>
> [1] https://gcc.gnu.org/wiki/cauldron2023
>
> --
> Kees Cook