Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754794AbeAHRyU (ORCPT + 1 other); Mon, 8 Jan 2018 12:54:20 -0500 Received: from mail-wm0-f68.google.com ([74.125.82.68]:36463 "EHLO mail-wm0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751143AbeAHRyT (ORCPT ); Mon, 8 Jan 2018 12:54:19 -0500 X-Google-Smtp-Source: ACJfBov32CKrKEss4K6S5Ld6f2PDYSe8wQl0hDyu/qeK7Mme38MwLWwtVuNkycbXwluOU9Is21UOqg== Date: Mon, 8 Jan 2018 18:54:15 +0100 From: Ingo Molnar To: Linus Torvalds Cc: David Woodhouse , Andi Kleen , Paul Turner , LKML , Greg Kroah-Hartman , Tim Chen , Dave Hansen , Thomas Gleixner , Kees Cook , Rik van Riel , Peter Zijlstra , Andy Lutomirski , Jiri Kosina , One Thousand Gnomes Subject: Re: [PATCH v6 00/10] Retpoline: Avoid speculative indirect calls in kernel Message-ID: <20180108175415.c7oqruzituruvr35@gmail.com> References: <1515363085-4219-1-git-send-email-dwmw@amazon.co.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20170609 (1.8.3) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: * Linus Torvalds wrote: > On Sun, Jan 7, 2018 at 2:11 PM, David Woodhouse wrote: > > This is a mitigation for the 'variant 2' attack described in > > https://googleprojectzero.blogspot.com/2018/01/reading-privileged-memory-with-side.html > > Ok, I don't love the patches, but I see nothing horribly wrong here > either, and I assume the performance impact of this is pretty minimal. > > Thomas? I'm obviously doing rc7 today without these, but I assume the > x86 maintainers are resigned to this all. And yes, we'll have at least > an rc8 this release.. I'm definitely resigned to them, and with these patches being disclosed so late we don't have any good choices left, so a tentative: Acked-by: Ingo Molnar Thanks, Ingo