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

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Message-Id: <AAA2EF2C-293D-4D5B-BFA6-FF655105CD84@redhat.com>
Date:   Sat, 11 Sep 2021 19:01:40 -0700
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     Andrea Arcangeli <aarcange@...hat.com>,
        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>,
        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 Sep 11, 2021, at 2:13 PM, Kees Cook <keescook@...omium.org> wrote:
> 
> 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. :)

Thanks!  You can add my

Acked-by: Josh Poimboeuf <jpoimboe@...hat.com>