From: Kees Cook <keescook@chromium.org>
To: Andrea Arcangeli <aarcange@redhat.com>
Cc: YiFei Zhu <zhuyifei1999@gmail.com>,
Linux Containers <containers@lists.linux-foundation.org>,
YiFei Zhu <yifeifz2@illinois.edu>, bpf <bpf@vger.kernel.org>,
kernel list <linux-kernel@vger.kernel.org>,
Aleksa Sarai <cyphar@cyphar.com>,
Andy Lutomirski <luto@amacapital.net>,
David Laight <David.Laight@aculab.com>,
Dimitrios Skarlatos <dskarlat@cs.cmu.edu>,
Giuseppe Scrivano <gscrivan@redhat.com>,
Hubertus Franke <frankeh@us.ibm.com>,
Jack Chen <jianyan2@illinois.edu>, Jann Horn <jannh@google.com>,
Josep Torrellas <torrella@illinois.edu>,
Tianyin Xu <tyxu@illinois.edu>,
Tobin Feldman-Fitzthum <tobin@ibm.com>,
Tycho Andersen <tycho@tycho.pizza>,
Valentin Rothberg <vrothber@redhat.com>,
Will Drewry <wad@chromium.org>, Jiri Kosina <jikos@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Waiman Long <longman@redhat.com>
Subject: Re: RFC: default to spec_store_bypass_disable=prctl spectre_v2_user=prctl
Date: Wed, 4 Nov 2020 14:14:07 -0800 [thread overview]
Message-ID: <202011041411.AD961737EA@keescook> (raw)
In-Reply-To: <20201104215702.GG24993@redhat.com>
On Wed, Nov 04, 2020 at 04:57:02PM -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.
Agreed. I think this is the right time to flip this switch. I agree with
the (very well described) rationales. :)
Fundamentally, likely everyone who is interested in manipulating the
mitigations are doing so now, and it doesn't make sense (on many fronts)
to tie some to seccomp mode any more (which was intended as a temporary
defense to gain coverage while sysadmins absorbed what the best
practices should be).
Thanks for sending this!
Acked-by: Kees Cook <keescook@chromium.org>
--
Kees Cook
next prev parent reply other threads:[~2020-11-04 22:19 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-04 21:57 RFC: default to spec_store_bypass_disable=prctl spectre_v2_user=prctl Andrea Arcangeli
2020-11-04 22:14 ` Kees Cook [this message]
2020-11-04 23:22 ` Thomas Gleixner
2020-11-04 23:40 ` Andrea Arcangeli
2020-11-05 0:14 ` [PATCH 0/1] x86: deduplicate the spectre_v2_user documentation Andrea Arcangeli
2020-11-05 0:14 ` [PATCH 1/1] " Andrea Arcangeli
2021-09-11 21:13 ` Kees Cook
2020-11-04 23:50 ` [PATCH 1/1] x86: change default to spec_store_bypass_disable=prctl spectre_v2_user=prctl Andrea Arcangeli
2021-09-11 21:13 ` Kees Cook
2021-09-12 2:01 ` Josh Poimboeuf
2021-10-04 17:54 ` Josh Poimboeuf
2021-10-04 19:14 ` Kees Cook
2021-09-12 23:14 ` Waiman Long
2021-07-10 18:05 ` RFC: " Jim Newsome
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