From owner-svn-src-head@FreeBSD.ORG Mon May 25 11:48:16 2015 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id A30B5C58; Mon, 25 May 2015 11:48:16 +0000 (UTC) (envelope-from avg@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 9082E110; Mon, 25 May 2015 11:48:16 +0000 (UTC) (envelope-from avg@FreeBSD.org) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.9/8.14.9) with ESMTP id t4PBmGww079466; Mon, 25 May 2015 11:48:16 GMT (envelope-from avg@FreeBSD.org) Received: (from avg@localhost) by svn.freebsd.org (8.14.9/8.14.9/Submit) id t4PBmGL4079465; Mon, 25 May 2015 11:48:16 GMT (envelope-from avg@FreeBSD.org) Message-Id: <201505251148.t4PBmGL4079465@svn.freebsd.org> X-Authentication-Warning: svn.freebsd.org: avg set sender to avg@FreeBSD.org using -f From: Andriy Gapon Date: Mon, 25 May 2015 11:48:16 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r283524 - head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 25 May 2015 11:48:16 -0000 Author: avg Date: Mon May 25 11:48:15 2015 New Revision: 283524 URL: https://svnweb.freebsd.org/changeset/base/283524 Log: dsl_dataset_promote_check: ensure that shared snaps do not become too long ... after they are transfered from the old origin to the new one. See: https://www.illumos.org/issues/5909 See: https://reviews.csiden.org/r/219/ Reviewed by: mahrens MFC after: 10 days Sponsored by: ClusterHQ Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_dataset.c Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_dataset.c ============================================================================== --- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_dataset.c Mon May 25 11:36:14 2015 (r283523) +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_dataset.c Mon May 25 11:48:15 2015 (r283524) @@ -2161,12 +2161,14 @@ dsl_dataset_promote_check(void *arg, dmu int err; uint64_t unused; uint64_t ss_mv_cnt; + size_t max_snap_len; err = promote_hold(ddpa, dp, FTAG); if (err != 0) return (err); hds = ddpa->ddpa_clone; + max_snap_len = MAXNAMELEN - strlen(ddpa->ddpa_clonename) - 1; if (dsl_dataset_phys(hds)->ds_flags & DS_FLAG_NOPROMOTE) { promote_rele(ddpa, FTAG); @@ -2230,6 +2232,10 @@ dsl_dataset_promote_check(void *arg, dmu /* Check that the snapshot name does not conflict */ VERIFY0(dsl_dataset_get_snapname(ds)); + if (strlen(ds->ds_snapname) >= max_snap_len) { + err = SET_ERROR(ENAMETOOLONG); + goto out; + } err = dsl_dataset_snap_lookup(hds, ds->ds_snapname, &val); if (err == 0) { (void) strcpy(ddpa->err_ds, snap->ds->ds_snapname);