linux-kernel - Re: [PATCH 1/1] x86: change default to spec_store_bypass_disable=prctl spectre_v2

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Message-ID: <202109111411.C3D58A18EC@keescook>
Date:   Sat, 11 Sep 2021 14:13:18 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Andrea Arcangeli <aarcange@...hat.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        YiFei Zhu <zhuyifei1999@...il.com>,
        Linux Containers <containers@...ts.linux-foundation.org>,
        YiFei Zhu <yifeifz2@...inois.edu>, bpf <bpf@...r.kernel.org>,
        kernel list <linux-kernel@...r.kernel.org>,
        Aleksa Sarai <cyphar@...har.com>,
        Andy Lutomirski <luto@...capital.net>,
        David Laight <David.Laight@...lab.com>,
        Dimitrios Skarlatos <dskarlat@...cmu.edu>,
        Giuseppe Scrivano <gscrivan@...hat.com>,
        Hubertus Franke <frankeh@...ibm.com>,
        Jack Chen <jianyan2@...inois.edu>,
        Jann Horn <jannh@...gle.com>,
        Josep Torrellas <torrella@...inois.edu>,
        Tianyin Xu <tyxu@...inois.edu>,
        Tobin Feldman-Fitzthum <tobin@....com>,
        Tycho Andersen <tycho@...ho.pizza>,
        Valentin Rothberg <vrothber@...hat.com>,
        Will Drewry <wad@...omium.org>, Jiri Kosina <jikos@...nel.org>,
        Waiman Long <longman@...hat.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 1/1] x86: change default to
 spec_store_bypass_disable=prctl spectre_v2_user=prctl

On Wed, Nov 04, 2020 at 06:50:54PM -0500, Andrea Arcangeli wrote:
> Switch the kernel default of SSBD and STIBP to the ones with
> CONFIG_SECCOMP=n (i.e. spec_store_bypass_disable=prctl
> spectre_v2_user=prctl) even if CONFIG_SECCOMP=y.

Hello x86 maintainers!

I'd really like to get this landed, so I'll take this via the
seccomp-tree unless someone else speaks up. This keeps falling off
the edge of my TODO list. :)

-Kees

-- 
Kees Cook