From mboxrd@z Thu Jan 1 00:00:00 1970 From: Leo Famulari Subject: libtiff security update (multiple CVEs) Date: Tue, 23 Aug 2016 15:44:34 -0400 Message-ID: <20160823194434.GA21964@jasmine> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="envbJBWh7q8WU6mo" Return-path: Received: from eggs.gnu.org ([2001:4830:134:3::10]:45189) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bcHd1-0005m3-L3 for guix-devel@gnu.org; Tue, 23 Aug 2016 15:44:58 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bcHcw-0001Si-3f for guix-devel@gnu.org; Tue, 23 Aug 2016 15:44:54 -0400 Received: from out2-smtp.messagingengine.com ([66.111.4.26]:34950) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bcHcs-0001MY-DQ for guix-devel@gnu.org; Tue, 23 Aug 2016 15:44:50 -0400 Received: from localhost (c-68-81-58-201.hsd1.pa.comcast.net [68.81.58.201]) by mail.messagingengine.com (Postfix) with ESMTPA id 89A4CF2970 for ; Tue, 23 Aug 2016 15:44:36 -0400 (EDT) Content-Disposition: inline List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org Sender: "Guix-devel" To: guix-devel@gnu.org --envbJBWh7q8WU6mo Content-Type: text/plain; charset=us-ascii Content-Disposition: inline I took these patches from the libtiff CVS repo using the information contained in the respective bug reports: http://bugzilla.maptools.org/buglist.cgi?product=libtiff This is my first time using CVS, so please review carefully. I removed the hunks that looked like this, since most of them did not apply: @@ -1,4 +1,4 @@ -/* $Id: tiffcrop.c,v 1.36 2016-07-11 21:26:03 erouault Exp $ */ +/* $Id: tiffcrop.c,v 1.37 2016-07-11 21:38:31 erouault Exp $ */ /* tiffcrop.c -- a port of tiffcp.c extended to include manipulations of * the image data through additional options listed below I also had to add a directory level, so ... diff -u -r1.36 -r1.37 --- tools/tiffcrop.c 11 Jul 2016 21:26:03 -0000 1.36 +++ tools/tiffcrop.c 11 Jul 2016 21:38:31 -0000 1.37 ... became ... diff -u -r1.36 -r1.37 --- libtiff/tools/tiffcrop.c 11 Jul 2016 21:26:03 -0000 1.36 +++ libtiff/tools/tiffcrop.c 11 Jul 2016 21:38:31 -0000 1.37 There are several CVEs in that cluster that libtiff did not provide a patch for. Instead, they decided to remove the affected component entirely in the upcoming release. For example http://bugzilla.maptools.org/show_bug.cgi?id=2567#c1 We could try copying other distros' patches for these, although in some cases the libtiff maintainer claims that the distro's patch is incorrect: http://bugzilla.maptools.org/show_bug.cgi?id=2563#c4 --envbJBWh7q8WU6mo Content-Type: text/plain; charset=us-ascii Content-Disposition: attachment; filename="0001-gnu-libtiff-Fix-CVE-2016-3623-3945-3990-3991-5321-53.patch" >From 27cf17edd6990ff388ca44d6319a9171e6ac6ff7 Mon Sep 17 00:00:00 2001 From: Leo Famulari Date: Tue, 23 Aug 2016 15:34:16 -0400 Subject: [PATCH] gnu: libtiff: Fix CVE-2016-{3623,3945,3990,3991,5321,5323}. * gnu/packages/image.scm (libtiff)[replacement]: New field. (libtiff/fixed): New variable. * gnu/packages/patches/libtiff-CVE-2016-3623.patch, gnu/packages/patches/libtiff-CVE-2016-3945.patch, gnu/packages/patches/libtiff-CVE-2016-3990.patch, gnu/packages/patches/libtiff-CVE-2016-3991.patch, gnu/packages/patches/libtiff-CVE-2016-5321.patch, gnu/packages/patches/libtiff-CVE-2016-5323.patch: New files. * gnu/local.mk (dist_patch_DATA): Add them. --- gnu/local.mk | 6 ++ gnu/packages/image.scm | 17 ++++ gnu/packages/patches/libtiff-CVE-2016-3623.patch | 30 ++++++ gnu/packages/patches/libtiff-CVE-2016-3945.patch | 94 +++++++++++++++++ gnu/packages/patches/libtiff-CVE-2016-3990.patch | 31 ++++++ gnu/packages/patches/libtiff-CVE-2016-3991.patch | 123 +++++++++++++++++++++++ gnu/packages/patches/libtiff-CVE-2016-5321.patch | 25 +++++ gnu/packages/patches/libtiff-CVE-2016-5323.patch | 88 ++++++++++++++++ 8 files changed, 414 insertions(+) create mode 100644 gnu/packages/patches/libtiff-CVE-2016-3623.patch create mode 100644 gnu/packages/patches/libtiff-CVE-2016-3945.patch create mode 100644 gnu/packages/patches/libtiff-CVE-2016-3990.patch create mode 100644 gnu/packages/patches/libtiff-CVE-2016-3991.patch create mode 100644 gnu/packages/patches/libtiff-CVE-2016-5321.patch create mode 100644 gnu/packages/patches/libtiff-CVE-2016-5323.patch diff --git a/gnu/local.mk b/gnu/local.mk index b8c5378..1217600 100644 --- a/gnu/local.mk +++ b/gnu/local.mk @@ -626,6 +626,12 @@ dist_patch_DATA = \ %D%/packages/patches/libtar-CVE-2013-4420.patch \ %D%/packages/patches/libtheora-config-guess.patch \ %D%/packages/patches/libtiff-CVE-2015-8665+CVE-2015-8683.patch \ + %D%/packages/patches/libtiff-CVE-2016-3623.patch \ + %D%/packages/patches/libtiff-CVE-2016-3945.patch \ + %D%/packages/patches/libtiff-CVE-2016-3990.patch \ + %D%/packages/patches/libtiff-CVE-2016-3991.patch \ + %D%/packages/patches/libtiff-CVE-2016-5321.patch \ + %D%/packages/patches/libtiff-CVE-2016-5323.patch \ %D%/packages/patches/libtiff-oob-accesses-in-decode.patch \ %D%/packages/patches/libtiff-oob-write-in-nextdecode.patch \ %D%/packages/patches/libtool-skip-tests2.patch \ diff --git a/gnu/packages/image.scm b/gnu/packages/image.scm index 7d72492..72a3204 100644 --- a/gnu/packages/image.scm +++ b/gnu/packages/image.scm @@ -150,6 +150,7 @@ maximum quality factor.") (define-public libtiff (package (name "libtiff") + (replacement libtiff/fixed) (version "4.0.6") (source (origin (method url-fetch) @@ -182,6 +183,22 @@ collection of tools for doing simple manipulations of TIFF images.") "See COPYRIGHT in the distribution.")) (home-page "http://www.remotesensing.org/libtiff/"))) +(define libtiff/fixed + (package + (inherit libtiff) + (source (origin + (inherit (package-source libtiff)) + (patches (search-patches + "libtiff-oob-accesses-in-decode.patch" + "libtiff-oob-write-in-nextdecode.patch" + "libtiff-CVE-2015-8665+CVE-2015-8683.patch" + "libtiff-CVE-2016-3623.patch" + "libtiff-CVE-2016-3945.patch" + "libtiff-CVE-2016-3990.patch" + "libtiff-CVE-2016-3991.patch" + "libtiff-CVE-2016-5321.patch" + "libtiff-CVE-2016-5323.patch")))))) + (define-public libwmf (package (name "libwmf") diff --git a/gnu/packages/patches/libtiff-CVE-2016-3623.patch b/gnu/packages/patches/libtiff-CVE-2016-3623.patch new file mode 100644 index 0000000..0870586 --- /dev/null +++ b/gnu/packages/patches/libtiff-CVE-2016-3623.patch @@ -0,0 +1,30 @@ +Fix CVE-2016-3623. + +https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-3623 +http://bugzilla.maptools.org/show_bug.cgi?id=2569 + +Patch extracted from upstream CVS repo with: +$ cvs diff -u -r1.16 -r1.17 tools/rgb2ycbcr.c + +Index: tools/rgb2ycbcr.c +=================================================================== +RCS file: /cvs/maptools/cvsroot/libtiff/tools/rgb2ycbcr.c,v +retrieving revision 1.16 +retrieving revision 1.17 +diff -u -r1.16 -r1.17 +--- libtiff/tools/rgb2ycbcr.c 21 Jun 2015 01:09:10 -0000 1.16 ++++ libtiff/tools/rgb2ycbcr.c 15 Aug 2016 21:26:56 -0000 1.17 +@@ -95,9 +95,13 @@ + break; + case 'h': + horizSubSampling = atoi(optarg); ++ if( horizSubSampling != 1 && horizSubSampling != 2 && horizSubSampling != 4 ) ++ usage(-1); + break; + case 'v': + vertSubSampling = atoi(optarg); ++ if( vertSubSampling != 1 && vertSubSampling != 2 && vertSubSampling != 4 ) ++ usage(-1); + break; + case 'r': + rowsperstrip = atoi(optarg); diff --git a/gnu/packages/patches/libtiff-CVE-2016-3945.patch b/gnu/packages/patches/libtiff-CVE-2016-3945.patch new file mode 100644 index 0000000..8ec62ba --- /dev/null +++ b/gnu/packages/patches/libtiff-CVE-2016-3945.patch @@ -0,0 +1,94 @@ +Fix CVE-2016-3945 (integer overflow in size of allocated +buffer, when -b mode is enabled, that could result in out-of-bounds +write). + +https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-3945 +http://bugzilla.maptools.org/show_bug.cgi?id=2545 + +Patch extracted from upstream CVS repo with: +$ cvs diff -u -r1.21 -r1.22 tools/tiff2rgba.c + +Index: tools/tiff2rgba.c +=================================================================== +RCS file: /cvs/maptools/cvsroot/libtiff/tools/tiff2rgba.c,v +retrieving revision 1.21 +retrieving revision 1.22 +diff -u -r1.21 -r1.22 +--- libtiff/tools/tiff2rgba.c 21 Jun 2015 01:09:10 -0000 1.21 ++++ libtiff/tools/tiff2rgba.c 15 Aug 2016 20:06:41 -0000 1.22 +@@ -147,6 +147,7 @@ + uint32 row, col; + uint32 *wrk_line; + int ok = 1; ++ uint32 rastersize, wrk_linesize; + + TIFFGetField(in, TIFFTAG_IMAGEWIDTH, &width); + TIFFGetField(in, TIFFTAG_IMAGELENGTH, &height); +@@ -163,7 +164,13 @@ + /* + * Allocate tile buffer + */ +- raster = (uint32*)_TIFFmalloc(tile_width * tile_height * sizeof (uint32)); ++ rastersize = tile_width * tile_height * sizeof (uint32); ++ if (tile_width != (rastersize / tile_height) / sizeof( uint32)) ++ { ++ TIFFError(TIFFFileName(in), "Integer overflow when calculating raster buffer"); ++ exit(-1); ++ } ++ raster = (uint32*)_TIFFmalloc(rastersize); + if (raster == 0) { + TIFFError(TIFFFileName(in), "No space for raster buffer"); + return (0); +@@ -173,7 +180,13 @@ + * Allocate a scanline buffer for swapping during the vertical + * mirroring pass. + */ +- wrk_line = (uint32*)_TIFFmalloc(tile_width * sizeof (uint32)); ++ wrk_linesize = tile_width * sizeof (uint32); ++ if (tile_width != wrk_linesize / sizeof (uint32)) ++ { ++ TIFFError(TIFFFileName(in), "Integer overflow when calculating wrk_line buffer"); ++ exit(-1); ++ } ++ wrk_line = (uint32*)_TIFFmalloc(wrk_linesize); + if (!wrk_line) { + TIFFError(TIFFFileName(in), "No space for raster scanline buffer"); + ok = 0; +@@ -249,6 +262,7 @@ + uint32 row; + uint32 *wrk_line; + int ok = 1; ++ uint32 rastersize, wrk_linesize; + + TIFFGetField(in, TIFFTAG_IMAGEWIDTH, &width); + TIFFGetField(in, TIFFTAG_IMAGELENGTH, &height); +@@ -263,7 +277,13 @@ + /* + * Allocate strip buffer + */ +- raster = (uint32*)_TIFFmalloc(width * rowsperstrip * sizeof (uint32)); ++ rastersize = width * rowsperstrip * sizeof (uint32); ++ if (width != (rastersize / rowsperstrip) / sizeof( uint32)) ++ { ++ TIFFError(TIFFFileName(in), "Integer overflow when calculating raster buffer"); ++ exit(-1); ++ } ++ raster = (uint32*)_TIFFmalloc(rastersize); + if (raster == 0) { + TIFFError(TIFFFileName(in), "No space for raster buffer"); + return (0); +@@ -273,7 +293,13 @@ + * Allocate a scanline buffer for swapping during the vertical + * mirroring pass. + */ +- wrk_line = (uint32*)_TIFFmalloc(width * sizeof (uint32)); ++ wrk_linesize = width * sizeof (uint32); ++ if (width != wrk_linesize / sizeof (uint32)) ++ { ++ TIFFError(TIFFFileName(in), "Integer overflow when calculating wrk_line buffer"); ++ exit(-1); ++ } ++ wrk_line = (uint32*)_TIFFmalloc(wrk_linesize); + if (!wrk_line) { + TIFFError(TIFFFileName(in), "No space for raster scanline buffer"); + ok = 0; diff --git a/gnu/packages/patches/libtiff-CVE-2016-3990.patch b/gnu/packages/patches/libtiff-CVE-2016-3990.patch new file mode 100644 index 0000000..7641c30 --- /dev/null +++ b/gnu/packages/patches/libtiff-CVE-2016-3990.patch @@ -0,0 +1,31 @@ +Fix CVE-2016-3990 (write buffer overflow in PixarLogEncode if more input +samples are provided than expected by PixarLogSetupEncode). + +https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-3990 +http://bugzilla.maptools.org/show_bug.cgi?id=2544 + +Patch extracted from upstream CVS repo with: +$ cvs diff -u -r1.45 -r1.46 libtiff/tif_pixarlog.c + +Index: libtiff/tif_pixarlog.c +=================================================================== +RCS file: /cvs/maptools/cvsroot/libtiff/libtiff/tif_pixarlog.c,v +retrieving revision 1.45 +retrieving revision 1.46 +diff -u -r1.45 -r1.46 +--- libtiff/libtiff/tif_pixarlog.c 28 Jun 2016 15:37:33 -0000 1.45 ++++ libtiff/libtiff/tif_pixarlog.c 15 Aug 2016 20:49:48 -0000 1.46 +@@ -1141,6 +1141,13 @@ + } + + llen = sp->stride * td->td_imagewidth; ++ /* Check against the number of elements (of size uint16) of sp->tbuf */ ++ if( n > td->td_rowsperstrip * llen ) ++ { ++ TIFFErrorExt(tif->tif_clientdata, module, ++ "Too many input bytes provided"); ++ return 0; ++ } + + for (i = 0, up = sp->tbuf; i < n; i += llen, up += llen) { + switch (sp->user_datafmt) { diff --git a/gnu/packages/patches/libtiff-CVE-2016-3991.patch b/gnu/packages/patches/libtiff-CVE-2016-3991.patch new file mode 100644 index 0000000..cb05f00 --- /dev/null +++ b/gnu/packages/patches/libtiff-CVE-2016-3991.patch @@ -0,0 +1,123 @@ +Fix CVE-2016-3991 (out-of-bounds write in loadImage()). + +https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-3991 +http://bugzilla.maptools.org/show_bug.cgi?id=2543 + +Patch extracted from upstream CVS repo with: +$ cvs diff -u -r1.37 -r1.38 tools/tiffcrop.c + +Index: tools/tiffcrop.c +=================================================================== +RCS file: /cvs/maptools/cvsroot/libtiff/tools/tiffcrop.c,v +retrieving revision 1.37 +retrieving revision 1.38 +diff -u -r1.37 -r1.38 +--- libtiff/tools/tiffcrop.c 11 Jul 2016 21:38:31 -0000 1.37 ++++ libtiff/tools/tiffcrop.c 15 Aug 2016 21:05:40 -0000 1.38 +@@ -798,6 +798,11 @@ + } + + tile_buffsize = tilesize; ++ if (tilesize == 0 || tile_rowsize == 0) ++ { ++ TIFFError("readContigTilesIntoBuffer", "Tile size or tile rowsize is zero"); ++ exit(-1); ++ } + + if (tilesize < (tsize_t)(tl * tile_rowsize)) + { +@@ -807,7 +812,12 @@ + tilesize, tl * tile_rowsize); + #endif + tile_buffsize = tl * tile_rowsize; +- } ++ if (tl != (tile_buffsize / tile_rowsize)) ++ { ++ TIFFError("readContigTilesIntoBuffer", "Integer overflow when calculating buffer size."); ++ exit(-1); ++ } ++ } + + tilebuf = _TIFFmalloc(tile_buffsize); + if (tilebuf == 0) +@@ -1210,6 +1220,12 @@ + !TIFFGetField(out, TIFFTAG_BITSPERSAMPLE, &bps) ) + return 1; + ++ if (tilesize == 0 || tile_rowsize == 0 || tl == 0 || tw == 0) ++ { ++ TIFFError("writeBufferToContigTiles", "Tile size, tile row size, tile width, or tile length is zero"); ++ exit(-1); ++ } ++ + tile_buffsize = tilesize; + if (tilesize < (tsize_t)(tl * tile_rowsize)) + { +@@ -1219,6 +1235,11 @@ + tilesize, tl * tile_rowsize); + #endif + tile_buffsize = tl * tile_rowsize; ++ if (tl != tile_buffsize / tile_rowsize) ++ { ++ TIFFError("writeBufferToContigTiles", "Integer overflow when calculating buffer size"); ++ exit(-1); ++ } + } + + tilebuf = _TIFFmalloc(tile_buffsize); +@@ -5945,12 +5966,27 @@ + TIFFGetField(in, TIFFTAG_TILELENGTH, &tl); + + tile_rowsize = TIFFTileRowSize(in); ++ if (ntiles == 0 || tlsize == 0 || tile_rowsize == 0) ++ { ++ TIFFError("loadImage", "File appears to be tiled, but the number of tiles, tile size, or tile rowsize is zero."); ++ exit(-1); ++ } + buffsize = tlsize * ntiles; ++ if (tlsize != (buffsize / ntiles)) ++ { ++ TIFFError("loadImage", "Integer overflow when calculating buffer size"); ++ exit(-1); ++ } + +- + if (buffsize < (uint32)(ntiles * tl * tile_rowsize)) + { + buffsize = ntiles * tl * tile_rowsize; ++ if (ntiles != (buffsize / tl / tile_rowsize)) ++ { ++ TIFFError("loadImage", "Integer overflow when calculating buffer size"); ++ exit(-1); ++ } ++ + #ifdef DEBUG2 + TIFFError("loadImage", + "Tilesize %u is too small, using ntiles * tilelength * tilerowsize %lu", +@@ -5969,8 +6005,25 @@ + TIFFGetFieldDefaulted(in, TIFFTAG_ROWSPERSTRIP, &rowsperstrip); + stsize = TIFFStripSize(in); + nstrips = TIFFNumberOfStrips(in); ++ if (nstrips == 0 || stsize == 0) ++ { ++ TIFFError("loadImage", "File appears to be striped, but the number of stipes or stripe size is zero."); ++ exit(-1); ++ } ++ + buffsize = stsize * nstrips; +- ++ if (stsize != (buffsize / nstrips)) ++ { ++ TIFFError("loadImage", "Integer overflow when calculating buffer size"); ++ exit(-1); ++ } ++ uint32 buffsize_check; ++ buffsize_check = ((length * width * spp * bps) + 7); ++ if (length != ((buffsize_check - 7) / width / spp / bps)) ++ { ++ TIFFError("loadImage", "Integer overflow detected."); ++ exit(-1); ++ } + if (buffsize < (uint32) (((length * width * spp * bps) + 7) / 8)) + { + buffsize = ((length * width * spp * bps) + 7) / 8; diff --git a/gnu/packages/patches/libtiff-CVE-2016-5321.patch b/gnu/packages/patches/libtiff-CVE-2016-5321.patch new file mode 100644 index 0000000..2afca18 --- /dev/null +++ b/gnu/packages/patches/libtiff-CVE-2016-5321.patch @@ -0,0 +1,25 @@ +Fix CVE-2016-5321. + +https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5321 +http://bugzilla.maptools.org/show_bug.cgi?id=2558 + +Patch extracted from upstream CVS repo with: +$ cvs diff -u -r1.35 -r1.36 tools/tiffcrop.c + +Index: tools/tiffcrop.c +=================================================================== +RCS file: /cvs/maptools/cvsroot/libtiff/tools/tiffcrop.c,v +retrieving revision 1.35 +retrieving revision 1.36 +diff -u -r1.35 -r1.36 +--- libtiff/tools/tiffcrop.c 19 Aug 2015 02:31:04 -0000 1.35 ++++ libtiff/tools/tiffcrop.c 11 Jul 2016 21:26:03 -0000 1.36 +@@ -989,7 +989,7 @@ + nrow = (row + tl > imagelength) ? imagelength - row : tl; + for (col = 0; col < imagewidth; col += tw) + { +- for (s = 0; s < spp; s++) ++ for (s = 0; s < spp && s < MAX_SAMPLES; s++) + { /* Read each plane of a tile set into srcbuffs[s] */ + tbytes = TIFFReadTile(in, srcbuffs[s], col, row, 0, s); + if (tbytes < 0 && !ignore) diff --git a/gnu/packages/patches/libtiff-CVE-2016-5323.patch b/gnu/packages/patches/libtiff-CVE-2016-5323.patch new file mode 100644 index 0000000..8b2a043 --- /dev/null +++ b/gnu/packages/patches/libtiff-CVE-2016-5323.patch @@ -0,0 +1,88 @@ +Fix CVE-2016-5323. + +https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5323 +http://bugzilla.maptools.org/show_bug.cgi?id=2559 + +Patch extracted from upstream CVS repo with: +$ cvs diff -u -r1.36 -r1.37 tools/tiffcrop.c + +Index: tools/tiffcrop.c +=================================================================== +RCS file: /cvs/maptools/cvsroot/libtiff/tools/tiffcrop.c,v +retrieving revision 1.36 +retrieving revision 1.37 +diff -u -r1.36 -r1.37 +--- libtiff/tools/tiffcrop.c 11 Jul 2016 21:26:03 -0000 1.36 ++++ libtiff/tools/tiffcrop.c 11 Jul 2016 21:38:31 -0000 1.37 +@@ -3738,7 +3738,7 @@ + + matchbits = maskbits << (8 - src_bit - bps); + /* load up next sample from each plane */ +- for (s = 0; s < spp; s++) ++ for (s = 0; (s < spp) && (s < MAX_SAMPLES); s++) + { + src = in[s] + src_offset + src_byte; + buff1 = ((*src) & matchbits) << (src_bit); +@@ -3837,7 +3837,7 @@ + src_bit = bit_offset % 8; + + matchbits = maskbits << (16 - src_bit - bps); +- for (s = 0; s < spp; s++) ++ for (s = 0; (s < spp) && (s < MAX_SAMPLES); s++) + { + src = in[s] + src_offset + src_byte; + if (little_endian) +@@ -3947,7 +3947,7 @@ + src_bit = bit_offset % 8; + + matchbits = maskbits << (32 - src_bit - bps); +- for (s = 0; s < spp; s++) ++ for (s = 0; (s < spp) && (s < MAX_SAMPLES); s++) + { + src = in[s] + src_offset + src_byte; + if (little_endian) +@@ -4073,7 +4073,7 @@ + src_bit = bit_offset % 8; + + matchbits = maskbits << (64 - src_bit - bps); +- for (s = 0; s < spp; s++) ++ for (s = 0; (s < spp) && (s < MAX_SAMPLES); s++) + { + src = in[s] + src_offset + src_byte; + if (little_endian) +@@ -4263,7 +4263,7 @@ + + matchbits = maskbits << (8 - src_bit - bps); + /* load up next sample from each plane */ +- for (s = 0; s < spp; s++) ++ for (s = 0; (s < spp) && (s < MAX_SAMPLES); s++) + { + src = in[s] + src_offset + src_byte; + buff1 = ((*src) & matchbits) << (src_bit); +@@ -4362,7 +4362,7 @@ + src_bit = bit_offset % 8; + + matchbits = maskbits << (16 - src_bit - bps); +- for (s = 0; s < spp; s++) ++ for (s = 0; (s < spp) && (s < MAX_SAMPLES); s++) + { + src = in[s] + src_offset + src_byte; + if (little_endian) +@@ -4471,7 +4471,7 @@ + src_bit = bit_offset % 8; + + matchbits = maskbits << (32 - src_bit - bps); +- for (s = 0; s < spp; s++) ++ for (s = 0; (s < spp) && (s < MAX_SAMPLES); s++) + { + src = in[s] + src_offset + src_byte; + if (little_endian) +@@ -4597,7 +4597,7 @@ + src_bit = bit_offset % 8; + + matchbits = maskbits << (64 - src_bit - bps); +- for (s = 0; s < spp; s++) ++ for (s = 0; (s < spp) && (s < MAX_SAMPLES); s++) + { + src = in[s] + src_offset + src_byte; + if (little_endian) -- 2.9.3 --envbJBWh7q8WU6mo--