From owner-svn-src-all@freebsd.org Wed May 11 16:20:24 2016 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 50CDCB378A1; Wed, 11 May 2016 16:20:24 +0000 (UTC) (envelope-from cem@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 mx1.freebsd.org (Postfix) with ESMTPS id 218E01176; Wed, 11 May 2016 16:20:24 +0000 (UTC) (envelope-from cem@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id u4BGKN9u025118; Wed, 11 May 2016 16:20:23 GMT (envelope-from cem@FreeBSD.org) Received: (from cem@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id u4BGKNe2025117; Wed, 11 May 2016 16:20:23 GMT (envelope-from cem@FreeBSD.org) Message-Id: <201605111620.u4BGKNe2025117@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: cem set sender to cem@FreeBSD.org using -f From: "Conrad E. Meyer" Date: Wed, 11 May 2016 16:20:23 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r299460 - head/sbin/fsck_ffs X-SVN-Group: head 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: 2.1.22 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: Wed, 11 May 2016 16:20:24 -0000 Author: cem Date: Wed May 11 16:20:23 2016 New Revision: 299460 URL: https://svnweb.freebsd.org/changeset/base/299460 Log: fsck_ffs: Don't overrun mount device buffer Maybe this case is impossible. Either way, when attempting to "/dev/"-prefix a non-global device name, check that we do not overrun the f_mntfromname buffer. In this case, truncating (with strlcpy or similar) would not be useful, since the f_mntfromname result of getmntpt() is passed directly to open(2) later. Reported by: Coverity CID: 1006789 Sponsored by: EMC / Isilon Storage Division Modified: head/sbin/fsck_ffs/main.c Modified: head/sbin/fsck_ffs/main.c ============================================================================== --- head/sbin/fsck_ffs/main.c Wed May 11 16:05:32 2016 (r299459) +++ head/sbin/fsck_ffs/main.c Wed May 11 16:20:23 2016 (r299460) @@ -644,6 +644,9 @@ getmntpt(const char *name) statfsp = &mntbuf[i]; ddevname = statfsp->f_mntfromname; if (*ddevname != '/') { + if (strlen(_PATH_DEV) + strlen(ddevname) + 1 > + sizeof(statfsp->f_mntfromname)) + continue; strcpy(device, _PATH_DEV); strcat(device, ddevname); strcpy(statfsp->f_mntfromname, device);