From owner-svn-src-all@freebsd.org Fri Jul 24 17:56:19 2020 Return-Path: Delivered-To: svn-src-all@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 1359B36E1EB; Fri, 24 Jul 2020 17:56:19 +0000 (UTC) (envelope-from asomers@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 4BCxhf4cFRz3dg4; Fri, 24 Jul 2020 17:56:18 +0000 (UTC) (envelope-from asomers@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 7C801E2C7; Fri, 24 Jul 2020 17:56:18 +0000 (UTC) (envelope-from asomers@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 06OHuIuJ093205; Fri, 24 Jul 2020 17:56:18 GMT (envelope-from asomers@FreeBSD.org) Received: (from asomers@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 06OHuIZL093204; Fri, 24 Jul 2020 17:56:18 GMT (envelope-from asomers@FreeBSD.org) Message-Id: <202007241756.06OHuIZL093204@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: asomers set sender to asomers@FreeBSD.org using -f From: Alan Somers Date: Fri, 24 Jul 2020 17:56:18 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r363485 - stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs X-SVN-Group: stable-11 X-SVN-Commit-Author: asomers X-SVN-Commit-Paths: stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs X-SVN-Commit-Revision: 363485 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 24 Jul 2020 17:56:19 -0000 Author: asomers Date: Fri Jul 24 17:56:17 2020 New Revision: 363485 URL: https://svnweb.freebsd.org/changeset/base/363485 Log: MFC r362891: Fix page fault in zfsctl_snapdir_getattr Must acquire the z_teardown_lock before accessing the zfsvfs_t object. I can't reproduce this panic on demand, but this looks like the correct solution. PR: 247668 Reviewed by: avg Sponsored by: Axcient Differential Revision: https://reviews.freebsd.org/D25543 Modified: stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ctldir.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ctldir.c ============================================================================== --- stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ctldir.c Fri Jul 24 17:45:06 2020 (r363484) +++ stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ctldir.c Fri Jul 24 17:56:17 2020 (r363485) @@ -1118,12 +1118,13 @@ zfsctl_snapdir_getattr(ap) vnode_t *vp = ap->a_vp; vattr_t *vap = ap->a_vap; zfsvfs_t *zfsvfs = vp->v_vfsp->vfs_data; - dsl_dataset_t *ds = dmu_objset_ds(zfsvfs->z_os); + dsl_dataset_t *ds; sfs_node_t *node = vp->v_data; uint64_t snap_count; int err; ZFS_ENTER(zfsvfs); + ds = dmu_objset_ds(zfsvfs->z_os); zfsctl_common_getattr(vp, vap); vap->va_ctime = dmu_objset_snap_cmtime(zfsvfs->z_os); vap->va_mtime = vap->va_ctime;