From owner-freebsd-bugs@freebsd.org Thu Dec 10 14:34:33 2020 Return-Path: Delivered-To: freebsd-bugs@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 958D64ACD50 for ; Thu, 10 Dec 2020 14:34:33 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (unknown [127.0.1.3]) by mx1.freebsd.org (Postfix) with ESMTP id 4CsGdj3fxcz4XKd for ; Thu, 10 Dec 2020 14:34:33 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id 7BE6D4ACC68; Thu, 10 Dec 2020 14:34:33 +0000 (UTC) Delivered-To: bugs@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 7BB1D4ACDC1 for ; Thu, 10 Dec 2020 14:34:33 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4CsGdj2ycCz4XF3 for ; Thu, 10 Dec 2020 14:34:33 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 58ECC1A438 for ; Thu, 10 Dec 2020 14:34:33 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 0BAEYXKv009141 for ; Thu, 10 Dec 2020 14:34:33 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 0BAEYXfF009140 for bugs@FreeBSD.org; Thu, 10 Dec 2020 14:34:33 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 251731] LOR between zfs and devfs Date: Thu, 10 Dec 2020 14:34:33 +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: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: juraj@lutter.sk X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: 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 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: 2.1.34 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 10 Dec 2020 14:34:33 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D251731 Bug ID: 251731 Summary: LOR between zfs and devfs Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: juraj@lutter.sk Hi, there is this LOR happening in recent -CURRENT (with GENERIC kernel): lock order reversal: 1st 0xfffff82d727e1258 zfs (zfs, lockmgr) @ /usr/src-cur/sys/kern/vfs_mount.c:1016 2nd 0xfffff82cb9a6b628 devfs (devfs, lockmgr) @ /usr/src-cur/sys/kern/vfs_mount.c:1027 lock order devfs -> zfs established at: #0 0xffffffff80c510ed at witness_checkorder+0x46d #1 0xffffffff80bb43f5 at lockmgr_xlock+0x55 #2 0xffffffff80cdb604 at _vn_lock+0x54 #3 0xffffffff80cbadd8 at vfs_domount+0xe68 #4 0xffffffff80cb95a2 at vfs_donmount+0x872 #5 0xffffffff80cbd8c7 at kernel_mount+0x57 #6 0xffffffff80cc01f1 at parse_mount+0x4a1 #7 0xffffffff80cbe6f9 at vfs_mountroot+0x589 #8 0xffffffff80b73eff at start_init+0x1f #9 0xffffffff80b9dbe0 at fork_exit+0x80 #10 0xffffffff8100968e at fork_trampoline+0xe lock order zfs -> devfs attempted at: #0 0xffffffff80c51a4c at witness_checkorder+0xdcc #1 0xffffffff80bb43f5 at lockmgr_xlock+0x55 #2 0xffffffff80cdb604 at _vn_lock+0x54 #3 0xffffffff80cbadd8 at vfs_domount+0xe68 #4 0xffffffff80cb95a2 at vfs_donmount+0x872 #5 0xffffffff80cb8cf9 at sys_nmount+0x69 #6 0xffffffff81035d1b at amd64_syscall+0x12b #7 0xffffffff81008f5e at fast_syscall_common+0xf8 Is this a known issue? Thanks. --=20 You are receiving this mail because: You are the assignee for the bug.=