From owner-svn-src-all@freebsd.org Thu Aug 2 23:45:26 2018 Return-Path: Delivered-To: svn-src-all@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 D80911054CE1; Thu, 2 Aug 2018 23:45:25 +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 8F4CA840FB; Thu, 2 Aug 2018 23:45:25 +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 5987F18B08; Thu, 2 Aug 2018 23:45:25 +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 w72NjPa6024275; Thu, 2 Aug 2018 23:45:25 GMT (envelope-from mav@FreeBSD.org) Received: (from mav@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w72NjP41024273; Thu, 2 Aug 2018 23:45:25 GMT (envelope-from mav@FreeBSD.org) Message-Id: <201808022345.w72NjP41024273@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: mav set sender to mav@FreeBSD.org using -f From: Alexander Motin Date: Thu, 2 Aug 2018 23:45:25 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-vendor@freebsd.org Subject: svn commit: r337204 - vendor-sys/illumos/dist/uts/common/fs/zfs X-SVN-Group: vendor-sys X-SVN-Commit-Author: mav X-SVN-Commit-Paths: vendor-sys/illumos/dist/uts/common/fs/zfs X-SVN-Commit-Revision: 337204 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: 2.1.27 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: Thu, 02 Aug 2018 23:45:26 -0000 Author: mav Date: Thu Aug 2 23:45:24 2018 New Revision: 337204 URL: https://svnweb.freebsd.org/changeset/base/337204 Log: 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: vendor-sys/illumos/dist/uts/common/fs/zfs/dnode.c vendor-sys/illumos/dist/uts/common/fs/zfs/dnode_sync.c Modified: vendor-sys/illumos/dist/uts/common/fs/zfs/dnode.c ============================================================================== --- vendor-sys/illumos/dist/uts/common/fs/zfs/dnode.c Thu Aug 2 23:45:14 2018 (r337203) +++ vendor-sys/illumos/dist/uts/common/fs/zfs/dnode.c Thu Aug 2 23:45:24 2018 (r337204) @@ -1605,13 +1605,11 @@ 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: vendor-sys/illumos/dist/uts/common/fs/zfs/dnode_sync.c ============================================================================== --- vendor-sys/illumos/dist/uts/common/fs/zfs/dnode_sync.c Thu Aug 2 23:45:14 2018 (r337203) +++ vendor-sys/illumos/dist/uts/common/fs/zfs/dnode_sync.c Thu Aug 2 23:45:24 2018 (r337204) @@ -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;