From owner-freebsd-security@freebsd.org Fri Jan 5 08:04:20 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 1CC63EBB6D9 for ; Fri, 5 Jan 2018 08:04:20 +0000 (UTC) (envelope-from des@des.no) Received: from smtp.des.no (smtp.des.no [194.63.250.102]) by mx1.freebsd.org (Postfix) with ESMTP id D99447C890 for ; Fri, 5 Jan 2018 08:04:19 +0000 (UTC) (envelope-from des@des.no) Received: from desk.des.no (smtp.des.no [194.63.250.102]) by smtp.des.no (Postfix) with ESMTP id A8E251036F; Fri, 5 Jan 2018 08:04:13 +0000 (UTC) Received: by desk.des.no (Postfix, from userid 1001) id 59F3D5CE83; Fri, 5 Jan 2018 08:02:41 +0000 (UTC) From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= To: Erich Dollansky Cc: freebsd-security@freebsd.org Subject: Re: Intel hardware bug References: <02563ce4-437c-ab96-54bb-a8b591900ba0@FreeBSD.org> <19876.1515025752@segfault.tristatelogic.com> <20180104132807.266fe46c.freebsd.ed.lists@sumeritec.com> <86vaghu0ps.fsf@desk.des.no> <20180105104020.51c2a742.freebsd.ed.lists@sumeritec.com> Date: Fri, 05 Jan 2018 09:02:41 +0100 In-Reply-To: <20180105104020.51c2a742.freebsd.ed.lists@sumeritec.com> (Erich Dollansky's message of "Fri, 5 Jan 2018 10:40:20 +0800") Message-ID: <86lghcu40u.fsf@desk.des.no> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.3 (berkeley-unix) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable 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: Fri, 05 Jan 2018 08:04:20 -0000 Erich Dollansky writes: > [much elided] > Directly yes, not if the kernel memory would be always in a different > segment. It would land then in cache only when memory near segment > bounds are accessed. Which could be easily avoided. Are you familiar with the expression =E2=80=9Cnot even wrong=E2=80=9D? DES --=20 Dag-Erling Sm=C3=B8rgrav - des@des.no