linux-kernel - Re: [RFC/RFT 0/3] Add compiler support for Control Flow Integrity

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Message-ID: <20230210161827.ze2dtrfugydlbw2p@ubuntu>
Date:   Fri, 10 Feb 2023 08:18:27 -0800
From:   Dan Li <ashimida.1990@...il.com>
To:     Hongtao Liu <crazylht@...il.com>
Cc:     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>,
        Kees Cook <keescook@...omium.org>,
        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 0/3] Add compiler support for Control Flow Integrity

On 02/09, Hongtao Liu wrote:
> On Mon, Dec 19, 2022 at 3:59 PM Dan Li via Gcc-patches
> <gcc-patches@....gnu.org> 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].
> >
> > I hope that this feature will also support user-mode CFI in the
> > future (at least for developers who can recompile the runtime),
> > so I use -fsanitize=cfi as a compilation option here.
> >
> > Any suggestion please let me know :).
> Do you have this series as a branch somewhere that we could also try for x86?

Hi Hongtao,

I haven't tried this feature on the x86 platform, if possible, I will try it in
the next version.

Thanks,
Dan.

> --
> BR,
> Hongtao