From owner-svn-src-vendor@FreeBSD.ORG Fri Jun 5 17:08:33 2015 Return-Path: Delivered-To: svn-src-vendor@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 27642128; Fri, 5 Jun 2015 17:08:33 +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 15331162E; Fri, 5 Jun 2015 17:08:33 +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 t55H8Wmm020424; Fri, 5 Jun 2015 17:08:32 GMT (envelope-from avg@FreeBSD.org) Received: (from avg@localhost) by svn.freebsd.org (8.14.9/8.14.9/Submit) id t55H8WA7020423; Fri, 5 Jun 2015 17:08:32 GMT (envelope-from avg@FreeBSD.org) Message-Id: <201506051708.t55H8WA7020423@svn.freebsd.org> X-Authentication-Warning: svn.freebsd.org: avg set sender to avg@FreeBSD.org using -f From: Andriy Gapon Date: Fri, 5 Jun 2015 17:08:32 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-vendor@freebsd.org Subject: svn commit: r284039 - vendor-sys/illumos/dist/uts/common/fs/zfs X-SVN-Group: vendor-sys MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-vendor@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: SVN commit messages for the vendor work area tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 05 Jun 2015 17:08:33 -0000 Author: avg Date: Fri Jun 5 17:08:32 2015 New Revision: 284039 URL: https://svnweb.freebsd.org/changeset/base/284039 Log: 5909 ensure that shared snap names don't become too long after promotion Author: Andriy Gapon Reviewed by: George Wilson Approved by: Dan McDonald illumos/illumos-gate@cb5842f8b0caaad0ed53535bd77042e933fdbafe Modified: vendor-sys/illumos/dist/uts/common/fs/zfs/dsl_dataset.c Modified: vendor-sys/illumos/dist/uts/common/fs/zfs/dsl_dataset.c ============================================================================== --- vendor-sys/illumos/dist/uts/common/fs/zfs/dsl_dataset.c Fri Jun 5 17:07:51 2015 (r284038) +++ vendor-sys/illumos/dist/uts/common/fs/zfs/dsl_dataset.c Fri Jun 5 17:08:32 2015 (r284039) @@ -2081,12 +2081,14 @@ 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); @@ -2150,6 +2152,10 @@ 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);