From owner-svn-src-head@freebsd.org Tue Mar 24 18:25:29 2020 Return-Path: Delivered-To: svn-src-head@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 D9E6E2653F4; Tue, 24 Mar 2020 18:25:29 +0000 (UTC) (envelope-from markj@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) server-signature RSA-PSS (4096 bits) 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 48n06b57VTz4Kps; Tue, 24 Mar 2020 18:25:27 +0000 (UTC) (envelope-from markj@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 7179D3F30; Tue, 24 Mar 2020 18:16:37 +0000 (UTC) (envelope-from markj@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 02OIGbhG003942; Tue, 24 Mar 2020 18:16:37 GMT (envelope-from markj@FreeBSD.org) Received: (from markj@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 02OIGbCM003941; Tue, 24 Mar 2020 18:16:37 GMT (envelope-from markj@FreeBSD.org) Message-Id: <202003241816.02OIGbCM003941@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: markj set sender to markj@FreeBSD.org using -f From: Mark Johnston Date: Tue, 24 Mar 2020 18:16:37 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r359276 - head/usr.sbin/newsyslog X-SVN-Group: head X-SVN-Commit-Author: markj X-SVN-Commit-Paths: head/usr.sbin/newsyslog X-SVN-Commit-Revision: 359276 X-SVN-Commit-Repository: base 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: 2.1.29 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: Tue, 24 Mar 2020 18:25:30 -0000 Author: markj Date: Tue Mar 24 18:16:36 2020 New Revision: 359276 URL: https://svnweb.freebsd.org/changeset/base/359276 Log: newsyslog: Fix stack corruption when initializing a zipwork structure. This happens when compressing a previously uncompressed already-rotated file, as happens when handling the 'p' flag in newsyslog.conf. The file name is stored in a flexible array member, so these structures cannot be stack allocated. Also make sure that we call change_attrs() and do_zipwork() in dry-run mode; they handle this properly, contrary to the commit log message for r327451. CID: 1008168 Github PR: https://github.com/freebsd/freebsd/pull/427 MFC after: 2 weeks Submitted by: Radek Brich (original version) Modified: head/usr.sbin/newsyslog/newsyslog.c Modified: head/usr.sbin/newsyslog/newsyslog.c ============================================================================== --- head/usr.sbin/newsyslog/newsyslog.c Tue Mar 24 18:16:02 2020 (r359275) +++ head/usr.sbin/newsyslog/newsyslog.c Tue Mar 24 18:16:36 2020 (r359276) @@ -1829,17 +1829,23 @@ do_rotate(const struct conf_entry *ent) else { /* XXX - Ought to be checking for failure! */ (void)rename(zfile1, zfile2); - change_attrs(zfile2, ent); - if (ent->compress && !strlen(logfile_suffix)) { - /* compress old rotation */ - struct zipwork_entry zwork; + } + change_attrs(zfile2, ent); + if (ent->compress && strlen(logfile_suffix) == 0) { + /* compress old rotation */ + struct zipwork_entry *zwork; + size_t sz; - memset(&zwork, 0, sizeof(zwork)); - zwork.zw_conf = ent; - zwork.zw_fsize = sizefile(zfile2); - strcpy(zwork.zw_fname, zfile2); - do_zipwork(&zwork); - } + sz = sizeof(*zwork) + strlen(zfile2) + 1; + zwork = calloc(1, sz); + if (zwork == NULL) + err(1, "calloc"); + + zwork->zw_conf = ent; + zwork->zw_fsize = sizefile(zfile2); + strcpy(zwork->zw_fname, zfile2); + do_zipwork(zwork); + free(zwork); } }