linux-kernel - Re: [PATCH 15/29] x86: Disable IBT around firmware

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 21 Feb 2022 17:10:51 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     x86@...nel.org, joao@...rdrivepizza.com, hjl.tools@...il.com,
        jpoimboe@...hat.com, andrew.cooper3@...rix.com,
        linux-kernel@...r.kernel.org, ndesaulniers@...gle.com,
        samitolvanen@...gle.com, mark.rutland@....com,
        alyssa.milburn@...el.com
Subject: Re: [PATCH 15/29] x86: Disable IBT around firmware

On Mon, Feb 21, 2022 at 07:54:55AM -0800, Kees Cook wrote:
> A small bike shed: should __noendbr have an alias, like
> __never_indirect or something, so there is an arch-agnostic way to do
> this that actually says what it does? (yes, it's in x86-only code now,
> hence the bike shed...)

I actually asked Mark a related question last week somewhere, I think
the answer was that the annotation either wasn't working or not as
useful on ARM64.

I'm thinking it's easy enough to do a mass rename if/when we cross that
bridge though.