From owner-freebsd-fs@FreeBSD.ORG Thu Mar 17 11:37:49 2011 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 69D5C1065679 for ; Thu, 17 Mar 2011 11:37:49 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from mail.zoral.com.ua (mx0.zoral.com.ua [91.193.166.200]) by mx1.freebsd.org (Postfix) with ESMTP id D65228FC17 for ; Thu, 17 Mar 2011 11:37:48 +0000 (UTC) Received: from deviant.kiev.zoral.com.ua (root@deviant.kiev.zoral.com.ua [10.1.1.148]) by mail.zoral.com.ua (8.14.2/8.14.2) with ESMTP id p2HBbiRS084762 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 17 Mar 2011 13:37:44 +0200 (EET) (envelope-from kostikbel@gmail.com) Received: from deviant.kiev.zoral.com.ua (kostik@localhost [127.0.0.1]) by deviant.kiev.zoral.com.ua (8.14.4/8.14.4) with ESMTP id p2HBbiNL069483; Thu, 17 Mar 2011 13:37:44 +0200 (EET) (envelope-from kostikbel@gmail.com) Received: (from kostik@localhost) by deviant.kiev.zoral.com.ua (8.14.4/8.14.4/Submit) id p2HBbihk069482; Thu, 17 Mar 2011 13:37:44 +0200 (EET) (envelope-from kostikbel@gmail.com) X-Authentication-Warning: deviant.kiev.zoral.com.ua: kostik set sender to kostikbel@gmail.com using -f Date: Thu, 17 Mar 2011 13:37:44 +0200 From: Kostik Belousov To: luke@hybrid-logic.co.uk Message-ID: <20110317113744.GT78089@deviant.kiev.zoral.com.ua> References: <1300334881.3837.126.camel@pow> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="8ck+19+G1KZxmYE5" Content-Disposition: inline In-Reply-To: <1300334881.3837.126.camel@pow> User-Agent: Mutt/1.4.2.3i X-Spam-Status: No, score=-3.4 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00, DNS_FROM_OPENWHOIS autolearn=no version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on skuns.kiev.zoral.com.ua Cc: freebsd-fs@freebsd.org Subject: Re: Guaranteed kernel panic with ZFS + nullfs X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 17 Mar 2011 11:37:49 -0000 --8ck+19+G1KZxmYE5 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable [Enormous Cc: list trimmed down] On Thu, Mar 17, 2011 at 12:08:01AM -0400, Luke Marsden wrote: > Hi all, >=20 > The following script seems to cause a guaranteed kernel panic on 8.1-R, > 8.2-R and 8-STABLE as of today (2011-03-16), with both ZFS v14/15, and > v28 on 8.2-R with mm@ patches from 2011-03. I suspect it may also affect > 9-CURRENT but have not tested this yet. >=20 > #!/usr/local/bin/bash > export POOL=3Dhpool # change this to your pool name > sudo zfs destroy -r $POOL/foo > sudo zfs create $POOL/foo > sudo zfs set mountpoint=3D/foo $POOL/foo > sudo mount -t nullfs /foo /bar > sudo touch /foo/baz > ls /bar # should see baz > sudo zfs umount -f $POOL/foo # seems okay (ls: /bar: Bad file > descriptor) > sudo zfs mount $POOL/foo # PANIC! >=20 > Can anyone suggest a patch which fixes this? Preferably against > 8-STABLE :-) Please show the backtrace. --8ck+19+G1KZxmYE5 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (FreeBSD) iEYEARECAAYFAk2B8ocACgkQC3+MBN1Mb4gijwCgwwMrkZTS63WrcITbR8X9XNYT 4QgAoOnm/8+rlNvBI/OPSx1aUFlQd5pV =cO+R -----END PGP SIGNATURE----- --8ck+19+G1KZxmYE5--