From owner-svn-src-all@freebsd.org Sat Oct 8 00:01:08 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 9C505C05C7F; Sat, 8 Oct 2016 00:01:08 +0000 (UTC) (envelope-from allanjude@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 6DDEFFE1; Sat, 8 Oct 2016 00:01:08 +0000 (UTC) (envelope-from allanjude@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id u9801767081227; Sat, 8 Oct 2016 00:01:07 GMT (envelope-from allanjude@FreeBSD.org) Received: (from allanjude@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id u98017kx081226; Sat, 8 Oct 2016 00:01:07 GMT (envelope-from allanjude@FreeBSD.org) Message-Id: <201610080001.u98017kx081226@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: allanjude set sender to allanjude@FreeBSD.org using -f From: Allan Jude Date: Sat, 8 Oct 2016 00:01:07 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r306834 - stable/11/sys/boot/geli X-SVN-Group: stable-11 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: 2.1.23 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: Sat, 08 Oct 2016 00:01:08 -0000 Author: allanjude Date: Sat Oct 8 00:01:07 2016 New Revision: 306834 URL: https://svnweb.freebsd.org/changeset/base/306834 Log: MFC: r306677 GELIBoot may attempt to read past the end of the disk PR: 213196 Relnotes: yes Sponsored by: ScaleEngine Inc. Modified: stable/11/sys/boot/geli/geliboot.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/boot/geli/geliboot.c ============================================================================== --- stable/11/sys/boot/geli/geliboot.c Fri Oct 7 23:52:30 2016 (r306833) +++ stable/11/sys/boot/geli/geliboot.c Sat Oct 8 00:01:07 2016 (r306834) @@ -77,17 +77,25 @@ geli_taste(int read_func(void *vdev, voi int error; off_t alignsector; - alignsector = (lastsector * DEV_BSIZE) & - ~(off_t)(DEV_GELIBOOT_BSIZE - 1); + alignsector = rounddown2(lastsector * DEV_BSIZE, DEV_GELIBOOT_BSIZE); + if (alignsector + DEV_GELIBOOT_BSIZE > ((lastsector + 1) * DEV_BSIZE)) { + /* Don't read past the end of the disk */ + alignsector = (lastsector * DEV_BSIZE) + DEV_BSIZE + - DEV_GELIBOOT_BSIZE; + } error = read_func(NULL, dskp, alignsector, &buf, DEV_GELIBOOT_BSIZE); if (error != 0) { return (error); } - /* Extract the last DEV_BSIZE bytes from the block. */ - error = eli_metadata_decode(buf + (DEV_GELIBOOT_BSIZE - DEV_BSIZE), - &md); + /* Extract the last 4k sector of the disk. */ + error = eli_metadata_decode(buf, &md); if (error != 0) { - return (error); + /* Try the last 512 byte sector instead. */ + error = eli_metadata_decode(buf + + (DEV_GELIBOOT_BSIZE - DEV_BSIZE), &md); + if (error != 0) { + return (error); + } } if (!(md.md_flags & G_ELI_FLAG_GELIBOOT)) {