From owner-freebsd-security@freebsd.org Tue Oct 9 20:36:53 2018 Return-Path: Delivered-To: freebsd-security@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 06B0710BBAC6 for ; Tue, 9 Oct 2018 20:36:53 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from kib.kiev.ua (kib.kiev.ua [IPv6:2001:470:d5e7:1::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 795577BA3C for ; Tue, 9 Oct 2018 20:36:52 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from tom.home (kib@localhost [127.0.0.1]) by kib.kiev.ua (8.15.2/8.15.2) with ESMTPS id w99KafEM068259 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Tue, 9 Oct 2018 23:36:44 +0300 (EEST) (envelope-from kostikbel@gmail.com) DKIM-Filter: OpenDKIM Filter v2.10.3 kib.kiev.ua w99KafEM068259 Received: (from kostik@localhost) by tom.home (8.15.2/8.15.2/Submit) id w99KafIC068258; Tue, 9 Oct 2018 23:36:41 +0300 (EEST) (envelope-from kostikbel@gmail.com) X-Authentication-Warning: tom.home: kostik set sender to kostikbel@gmail.com using -f Date: Tue, 9 Oct 2018 23:36:41 +0300 From: Konstantin Belousov To: Dave Cottlehuber Cc: freebsd-security@freebsd.org Subject: Re: [FreeBSD-Announce] FreeBSD Errata Notice FreeBSD-EN-18:08.lazyfpu Message-ID: <20181009203641.GB5335@kib.kiev.ua> References: <20180912054340.1267C13295@freefall.freebsd.org> <1536910798.329524.1507804736.2F76C06D@webmail.messagingengine.com> <1538990471.3423409.1534301664.7759970E@webmail.messagingengine.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1538990471.3423409.1534301664.7759970E@webmail.messagingengine.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-Spam-Status: No, score=-1.0 required=5.0 tests=ALL_TRUSTED,BAYES_00, DKIM_ADSP_CUSTOM_MED,FORGED_GMAIL_RCVD,FREEMAIL_FROM, NML_ADSP_CUSTOM_MED autolearn=no autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on tom.home X-BeenThere: freebsd-security@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: "Security issues \[members-only posting\]" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 09 Oct 2018 20:36:53 -0000 On Mon, Oct 08, 2018 at 11:21:11AM +0200, Dave Cottlehuber wrote: > On Fri, 14 Sep 2018, at 09:39, Dave Cottlehuber wrote: > > On Wed, 12 Sep 2018, at 07:43, FreeBSD Errata Notices wrote: > > > -----BEGIN PGP SIGNED MESSAGE----- > > > Hash: SHA512 > > > > > > ============================================================================= > > > FreeBSD-EN-18:08.lazyfpu Errata Notice > > > The FreeBSD Project > > > > > > Topic: LazyFPU remediation causes potential data corruption > > > > Data Corruption reads a bit like "Imminent SuperNova in Your Area".. I'm > > not really sure what it means for users & sysadmins. Given we've had the > > original lazyfpu patches out for 11.x for a few months[1]: > > > > - what might data corruption entail? The FPU registers can be corrupted. This was observed so far only on the in-kernel FPU consumer, i.e. aesni.ko. > > - has this been observed in the wild? Yes, see above. > > > > Many thanks for the efforts into making these patches available. > > Dave > > > > [1]: https://www.freebsd.org/security/advisories/FreeBSD-SA-18:07.lazyfpu.asc > > Hi secteam, can you shed any light on the above? > > Thanks > Dave > _______________________________________________ > freebsd-security@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-security > To unsubscribe, send any mail to "freebsd-security-unsubscribe@freebsd.org"