linux-hardening - Re: [RFC/RFT] CFI: Add support for gcc CFI in aarch64

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Date:   Fri, 10 Feb 2023 08:14:15 -0800
From:   Dan Li <ashimida.1990@...il.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     concord@...too.org, linux-hardening@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>,
        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>, Mark Rutland <mark.rutland@....com>,
        Josh Poimboeuf <jpoimboe@...nel.org>,
        Qing Zhao <qing.zhao@...cle.com>,
        "Paul E. McKenney" <paulmck@...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
Subject: Re: [RFC/RFT] CFI: Add support for gcc CFI in aarch64

On 02/08, Kees Cook wrote:
> On Sat, Jan 07, 2023 at 07:42:13AM -0800, Dan Li wrote:
> > Hi Kees,
> > 
> > In the next version I'll make the gcc implementation consistent with clang.
> 
> Hi!
> 
> Just checking in on this, since there are a lot of interested folks. :)
> What's the status on the next version (and has anyone been found to
> tackle the x86 backend part)? Is there anything we can help with?
> 

Hi Kees,

Sorry for the long delay. It's been hard for me to find time to finish this
until the end of February due to job changes (even weekends are busy :( ).

As much as I'd love to get it done as soon as possible, I'm sorry I probably
won't be able to submit the next version until March (maybe mid).

If anyone could help improve this, I'd be very grateful, otherwise I'll have
the next version done by the end of March (as a promise), and also try it in
x86 platform.

Sincerely apologize!

Dan.

> Thanks!
> 
> -Kees
> 
> -- 
> Kees Cook