From owner-freebsd-security@freebsd.org Wed Jan 3 19:01:48 2018 Return-Path: Delivered-To: freebsd-security@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 5F8AEEA9FC6 for ; Wed, 3 Jan 2018 19:01:48 +0000 (UTC) (envelope-from lev@FreeBSD.org) Received: from onlyone.not-for.work (onlyone.not-for.work [IPv6:2a01:4f8:201:6350::2]) by mx1.freebsd.org (Postfix) with ESMTP id 2D83E138C for ; Wed, 3 Jan 2018 19:01:48 +0000 (UTC) (envelope-from lev@FreeBSD.org) Received: from lion.home.serebryakov.spb.ru (unknown [IPv6:2001:470:923f:1:e0f4:994:662:862]) (Authenticated sender: lev@serebryakov.spb.ru) by onlyone.not-for.work (Postfix) with ESMTPSA id 1ABB6693; Wed, 3 Jan 2018 22:01:40 +0300 (MSK) Date: Wed, 3 Jan 2018 22:01:38 +0300 From: Lev Serebryakov Reply-To: Lev Serebryakov Organization: FreeBSD X-Priority: 3 (Normal) Message-ID: <104827876.20180103220138@serebryakov.spb.ru> To: Joey Kelly , freebsd-security@freebsd.org Subject: Re: Intel hardware bug In-Reply-To: <7692356.NWgAdSPsLq@elisha.atlnet> References: <477ab39d-286d-d9a2-d31e-fd5f7f1679a8@sentex.net> <7692356.NWgAdSPsLq@elisha.atlnet> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-security@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: "Security issues \[members-only posting\]" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 03 Jan 2018 19:01:48 -0000 Hello Joey, Wednesday, January 3, 2018, 4:56:50 AM, you wrote: > No way around it. It's hardware FAIL, and ignoring it isn't an option since > it's apparently a huge hole. Looks like there IS way around it and it was "silently" committed to Linux http://pythonsweetness.tumblr.com/post/169166980422/the-mysterious-case-of-the-linux-page-table But TLB flush on each syscall (twice) will slow down system, of course, so there should be option to disable it. -- Best regards, Lev mailto:lev@FreeBSD.org