From owner-freebsd-security@FreeBSD.ORG Wed Mar 11 18:38:04 2015 Return-Path: Delivered-To: freebsd-security@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 1F617925 for ; Wed, 11 Mar 2015 18:38:04 +0000 (UTC) Received: from kib.kiev.ua (kib.kiev.ua [IPv6:2001:470:d5e7:1::1]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 726FA98A for ; Wed, 11 Mar 2015 18:38:03 +0000 (UTC) Received: from tom.home (kostik@localhost [127.0.0.1]) by kib.kiev.ua (8.14.9/8.14.9) with ESMTP id t2BIbv6d096432 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 11 Mar 2015 20:37:57 +0200 (EET) (envelope-from kostikbel@gmail.com) DKIM-Filter: OpenDKIM Filter v2.9.2 kib.kiev.ua t2BIbv6d096432 Received: (from kostik@localhost) by tom.home (8.14.9/8.14.9/Submit) id t2BIbvCx096431; Wed, 11 Mar 2015 20:37:57 +0200 (EET) (envelope-from kostikbel@gmail.com) X-Authentication-Warning: tom.home: kostik set sender to kostikbel@gmail.com using -f Date: Wed, 11 Mar 2015 20:37:57 +0200 From: Konstantin Belousov To: Mike Tancsa Subject: Re: DRAM Rowhammer exploits Message-ID: <20150311183757.GI2379@kib.kiev.ua> References: <54FFF8AD.90507@freebsd.org> <20150311181346.GH2379@kib.kiev.ua> <550089CD.8040903@sentex.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <550089CD.8040903@sentex.net> User-Agent: Mutt/1.5.23 (2014-03-12) X-Spam-Status: No, score=-2.0 required=5.0 tests=ALL_TRUSTED,BAYES_00, DKIM_ADSP_CUSTOM_MED,FREEMAIL_FROM,NML_ADSP_CUSTOM_MED autolearn=no autolearn_force=no version=3.4.0 X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on tom.home Cc: freebsd-security@freebsd.org X-BeenThere: freebsd-security@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "Security issues \[members-only posting\]" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Mar 2015 18:38:04 -0000 On Wed, Mar 11, 2015 at 02:30:37PM -0400, Mike Tancsa wrote: > On 3/11/2015 2:13 PM, Konstantin Belousov wrote: > > > I just made somewhat dirty port of the double_sided program, available at > > https://github.com/kostikbel/rowhammer-test/tree/freebsd > > How many iterations does it usually take to trip up the bug if its there ? Look at the original report, AFAIR it has the numbers. My machine does not exhibit the issue, at least not with the tests I tried.