From owner-freebsd-security@FreeBSD.ORG Tue Sep 25 09:28:16 2012 Return-Path: Delivered-To: freebsd-security@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 13DF8106564A; Tue, 25 Sep 2012 09:28:16 +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 BFE298FC1E; Tue, 25 Sep 2012 09:28:15 +0000 (UTC) Received: from ds4.des.no (smtp.des.no [194.63.250.102]) by smtp.des.no (Postfix) with ESMTP id 7F70660D1; Tue, 25 Sep 2012 11:28:14 +0200 (CEST) Received: by ds4.des.no (Postfix, from userid 1001) id 4572D8153; Tue, 25 Sep 2012 11:28:14 +0200 (CEST) From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= To: Ben Laurie References: <20120918211422.GA1400@garage.freebsd.pl> <20120919231051.4bc5335b@gumby.homeunix.com> <20120920102104.GA1397@garage.freebsd.pl> <201209200758.51924.jhb@freebsd.org> <20120922080323.GA1454@garage.freebsd.pl> <20120922195325.GH1454@garage.freebsd.pl> <505E59DC.7090505@gmail.com> <20120923151706.GN1454@garage.freebsd.pl> <5060D723.6020305@gmail.com> Date: Tue, 25 Sep 2012 11:28:13 +0200 In-Reply-To: (Ben Laurie's message of "Tue, 25 Sep 2012 10:03:22 +0100") Message-ID: <86r4pqqwnm.fsf@ds4.des.no> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.4 (berkeley-unix) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Cc: Jonathan Anderson , Pawel Jakub Dawidek , John Baldwin , freebsd-security@freebsd.org, RW , Mariusz Gromada Subject: Re: Collecting entropy from device_attach() times. X-BeenThere: freebsd-security@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Security issues \[members-only posting\]" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 25 Sep 2012 09:28:16 -0000 Ben Laurie writes: > Not that I dislike Pawel's approach, it seems promising, I'm just > pointing out the weakness of the analysis. It is also based on fake data. If you give me a couple of days, I'll try to come up with a patch that collects and stores attach times during boot so we can gather and analyse real data. DES --=20 Dag-Erling Sm=C3=B8rgrav - des@des.no