From owner-svn-src-stable@freebsd.org Wed Oct 3 14:52:36 2018 Return-Path: Delivered-To: svn-src-stable@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 7D7A710C5AE0; Wed, 3 Oct 2018 14:52:36 +0000 (UTC) (envelope-from mav@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 32EF97F35D; Wed, 3 Oct 2018 14:52:36 +0000 (UTC) (envelope-from mav@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 13D47186FF; Wed, 3 Oct 2018 14:52:36 +0000 (UTC) (envelope-from mav@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w93EqZH1035307; Wed, 3 Oct 2018 14:52:35 GMT (envelope-from mav@FreeBSD.org) Received: (from mav@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w93EqZLI035306; Wed, 3 Oct 2018 14:52:35 GMT (envelope-from mav@FreeBSD.org) Message-Id: <201810031452.w93EqZLI035306@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: mav set sender to mav@FreeBSD.org using -f From: Alexander Motin Date: Wed, 3 Oct 2018 14:52:35 +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: r339137 - stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs X-SVN-Group: stable-11 X-SVN-Commit-Author: mav X-SVN-Commit-Paths: stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs X-SVN-Commit-Revision: 339137 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 03 Oct 2018 14:52:36 -0000 Author: mav Date: Wed Oct 3 14:52:35 2018 New Revision: 339137 URL: https://svnweb.freebsd.org/changeset/base/339137 Log: MFC r337205: MFV r337204: 9439 ZFS double-free due to failure to dirty indirect block illumos/illumos-gate@99a19144e82244f3426f055cc73af8a937c0135c Reviewed by: George Wilson Reviewed by: Paul Dagnelie Approved by: Robert Mustacchi Author: Matthew Ahrens Modified: stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode.c stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode_sync.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode.c ============================================================================== --- stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode.c Wed Oct 3 14:51:49 2018 (r339136) +++ stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode.c Wed Oct 3 14:52:35 2018 (r339137) @@ -1616,13 +1616,11 @@ dnode_free_range(dnode_t *dn, uint64_t off, uint64_t l if (off == 0 && len >= blksz) { /* * Freeing the whole block; fast-track this request. - * Note that we won't dirty any indirect blocks, - * which is fine because we will be freeing the entire - * file and thus all indirect blocks will be freed - * by free_children(). */ blkid = 0; nblks = 1; + if (dn->dn_nlevels > 1) + dnode_dirty_l1(dn, 0, tx); goto done; } else if (off >= blksz) { /* Freeing past end-of-data */ Modified: stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode_sync.c ============================================================================== --- stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode_sync.c Wed Oct 3 14:51:49 2018 (r339136) +++ stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode_sync.c Wed Oct 3 14:52:35 2018 (r339137) @@ -263,6 +263,24 @@ free_children(dmu_buf_impl_t *db, uint64_t blkid, uint if (db->db_state != DB_CACHED) (void) dbuf_read(db, NULL, DB_RF_MUST_SUCCEED); + /* + * If we modify this indirect block, and we are not freeing the + * dnode (!free_indirects), then this indirect block needs to get + * written to disk by dbuf_write(). If it is dirty, we know it will + * be written (otherwise, we would have incorrect on-disk state + * because the space would be freed but still referenced by the BP + * in this indirect block). Therefore we VERIFY that it is + * dirty. + * + * Our VERIFY covers some cases that do not actually have to be + * dirty, but the open-context code happens to dirty. E.g. if the + * blocks we are freeing are all holes, because in that case, we + * are only freeing part of this indirect block, so it is an + * ancestor of the first or last block to be freed. The first and + * last L1 indirect blocks are always dirtied by dnode_free_range(). + */ + VERIFY(BP_GET_FILL(db->db_blkptr) == 0 || db->db_dirtycnt > 0); + dbuf_release_bp(db); bp = db->db.db_data;