From owner-freebsd-bugs@freebsd.org Thu Jun 30 09:25:56 2016 Return-Path: Delivered-To: freebsd-bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id AB7C7B86B99 for ; Thu, 30 Jun 2016 09:25:56 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (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 82FDC2E30 for ; Thu, 30 Jun 2016 09:25:56 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id u5U9PuaH075033 for ; Thu, 30 Jun 2016 09:25:56 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 210721] Rerooting to an imported ZFS pool triggers panic Date: Thu, 30 Jun 2016 09:25:56 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 11.0-CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: crest_maintainer@rlwinm.de X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter attachments.created Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 30 Jun 2016 09:25:56 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D210721 Bug ID: 210721 Summary: Rerooting to an imported ZFS pool triggers panic Product: Base System Version: 11.0-CURRENT Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: crest_maintainer@rlwinm.de Created attachment 171971 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D171971&action= =3Dedit system console output Rerooting to a ZFS dataseft triggers a kernel panic unless the ZFS pool containing the new root filesystem is exported before rerooting. Steps to reproduce the problem: * Install FreeBSD 11.0-ALPHA5 with ZFS on root. * Install FreeBSD 10.0-ALPHA5 again on the same computer in a differen ZFS pool. * Boot into the first installation. * Set the vfs.root.mountfrom kernel env var to zfs:$SECOND_POOL_ROOT * Reroot with `reboot -r`. * Watch the kernel panic. uname -a output: FreeBSD sol.local 11.0-ALPHA5 FreeBSD 11.0-ALPHA5 #0 r302293: Thu Jun 30 08:21:36 UTC 2016 root@sol.local:/usr/obj/usr/src/sys/GENERIC amd64 I attached the kernel panic backtrace. The exporting the second pool before running `reroot -r` prevents the panic during rerooting. My test setup is slightly more complicated because the second pool resides = on GELI encrypted partitions, but it shouldn't influence the outcome. --=20 You are receiving this mail because: You are the assignee for the bug.=