From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jan Kiszka Subject: Re: bad leakage between virtual machines? Date: Wed, 20 Jan 2010 01:18:17 +0100 Message-ID: <4B564BC9.5010407@web.de> References: <20100115101706.4fb8897a@tomh.ccur.com> <4B50A7F5.4020708@siemens.com> <20100115132128.1c04ed46@tomh.ccur.com> <4B50B639.3050203@siemens.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig5BF8345EDD7378F2277B3D7D" Cc: Tom Horsley , kvm@vger.kernel.org To: unlisted-recipients:; (no To-header on input) Return-path: Received: from fmmailgate03.web.de ([217.72.192.234]:40319 "EHLO fmmailgate03.web.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755421Ab0ATAS1 (ORCPT ); Tue, 19 Jan 2010 19:18:27 -0500 In-Reply-To: <4B50B639.3050203@siemens.com> Sender: kvm-owner@vger.kernel.org List-ID: This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig5BF8345EDD7378F2277B3D7D Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Jan Kiszka wrote: > Tom Horsley wrote: >> On Fri, 15 Jan 2010 18:37:57 +0100 >> Jan Kiszka wrote: >> >>> Tom Horsley wrote: >>>> I just submitted this fedora bug with lots of details: >>>> >>>> https://bugzilla.redhat.com/show_bug.cgi?id=3D555788 >>>> >>>> It sure seems to me like the contents of the debug >>>> address trap registers are leaking across virtual machines >>>> (at least for opterons on this motherboard :-). >>> Are only AMD boxes affected, or did you also test on Intel? >> I haven't explicitly tested on Intel, but we did just see a >> compile on a guest on the Intel host also get the same >> Breakpoint/Trap error out of the blue, so it looks as if it >> does happen on intel as well as amd. >=20 > OK, will have a look at your test application once time permits. >=20 Just did so with bleeding-edge kvm-kmod and qemu-kvm-0.12.1.2 on an Intel host. But nothing exciting happened. Are you sure that test on an Intel host was really an Intel? In your bug report you write the contrary. Anyway, will have my hands on an AMD box tomorrow and try to reproduce there. Jan --------------enig5BF8345EDD7378F2277B3D7D Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (GNU/Linux) Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org iEYEARECAAYFAktWS9EACgkQitSsb3rl5xTWowCfTpPWzFcl1dcwMF/mYi3ZpIlj GuoAn1BnIOv3lo1EJj+Dp8MBnF/2bjZn =/IUy -----END PGP SIGNATURE----- --------------enig5BF8345EDD7378F2277B3D7D--