From owner-svn-src-head@freebsd.org Tue Jun 11 22:21:30 2019 Return-Path: Delivered-To: svn-src-head@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 B11D115C8C95; Tue, 11 Jun 2019 22:21:30 +0000 (UTC) (envelope-from delphij@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 50CF882F06; Tue, 11 Jun 2019 22:21:30 +0000 (UTC) (envelope-from delphij@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 2BEE180AF; Tue, 11 Jun 2019 22:21:30 +0000 (UTC) (envelope-from delphij@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x5BMLTV4068336; Tue, 11 Jun 2019 22:21:29 GMT (envelope-from delphij@FreeBSD.org) Received: (from delphij@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x5BMLTTG068335; Tue, 11 Jun 2019 22:21:29 GMT (envelope-from delphij@FreeBSD.org) Message-Id: <201906112221.x5BMLTTG068335@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: delphij set sender to delphij@FreeBSD.org using -f From: Xin LI Date: Tue, 11 Jun 2019 22:21:29 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r348967 - head/sbin/fsck_msdosfs X-SVN-Group: head X-SVN-Commit-Author: delphij X-SVN-Commit-Paths: head/sbin/fsck_msdosfs X-SVN-Commit-Revision: 348967 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 50CF882F06 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.98 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.998,0]; NEURAL_HAM_SHORT(-0.98)[-0.981,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US]; NEURAL_HAM_LONG(-1.00)[-1.000,0] 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, 11 Jun 2019 22:21:30 -0000 Author: delphij Date: Tue Jun 11 22:21:29 2019 New Revision: 348967 URL: https://svnweb.freebsd.org/changeset/base/348967 Log: Avoid out of boundary access when checking invalid long filenames. Obtained from: OpenBSD (dir.c,v 1.25) MFC after: 3 days Modified: head/sbin/fsck_msdosfs/dir.c Modified: head/sbin/fsck_msdosfs/dir.c ============================================================================== --- head/sbin/fsck_msdosfs/dir.c Tue Jun 11 22:07:39 2019 (r348966) +++ head/sbin/fsck_msdosfs/dir.c Tue Jun 11 22:21:29 2019 (r348967) @@ -629,6 +629,15 @@ readDosDirSection(int f, struct bootblock *boot, struc vallfn = NULL; } lidx = *p & LRNOMASK; + if (lidx == 0) { + pwarn("invalid long name\n"); + if (!invlfn) { + invlfn = vallfn; + invcl = valcl; + } + vallfn = NULL; + continue; + } t = longName + --lidx * 13; for (k = 1; k < 11 && t < longName + sizeof(longName); k += 2) {