From owner-freebsd-fs@freebsd.org Mon Feb 19 08:55:53 2018 Return-Path: Delivered-To: freebsd-fs@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 58E54F10356 for ; Mon, 19 Feb 2018 08:55:53 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.ysv.freebsd.org (mxrelay.ysv.freebsd.org [IPv6:2001:1900:2254:206a::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.ysv.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id ED25668414 for ; Mon, 19 Feb 2018 08:55:52 +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 mxrelay.ysv.freebsd.org (Postfix) with ESMTPS id 2386E10D97 for ; Mon, 19 Feb 2018 08:55:52 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id w1J8tqEY047275 for ; Mon, 19 Feb 2018 08:55:52 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from bugzilla@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id w1J8tqRu047274 for freebsd-fs@FreeBSD.org; Mon, 19 Feb 2018 08:55:52 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: bugzilla set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: freebsd-fs@FreeBSD.org Subject: [Bug 225795] panic: found unreferenced mountpoint when accessing and unmounting snapshots in parallel Date: Mon, 19 Feb 2018 08:55:52 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed 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: commit-hook@freebsd.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-fs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: 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-fs@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 19 Feb 2018 08:55:53 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D225795 --- Comment #4 from commit-hook@freebsd.org --- A commit references this bug: Author: avg Date: Mon Feb 19 08:55:23 UTC 2018 New revision: 329556 URL: https://svnweb.freebsd.org/changeset/base/329556 Log: relax an assert in zfsctl_snapdir_lookup to match r323578 Since r323578 we may remove the last reference to a covered vnode with vrele() instead of vput(). So, v_usecount may be decremented before the vnode is locked and zfsctl_snapdir_lookup may "catch" the vnode with v_usecount of zero and v_holdcnt of one. PR: 225795 Reported by: asomers MFC after: 1 week Changes: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ctldir.c --=20 You are receiving this mail because: You are the assignee for the bug.=