446 lines
18 KiB
HTML
446 lines
18 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML>
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<HEAD>
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<TITLE>
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Changes in TIFF v4.0.8
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</TITLE>
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</HEAD>
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<BODY BGCOLOR=white>
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<FONT FACE="Helvetica, Arial, Sans">
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<BASEFONT SIZE=4>
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<B><FONT SIZE=+3>T</FONT>IFF <FONT SIZE=+2>C</FONT>HANGE <FONT SIZE=+2>I</FONT>NFORMATION</B>
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<BASEFONT SIZE=3>
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<UL>
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<HR SIZE=4 WIDTH=65% ALIGN=left>
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<B>Current Version</B>: v4.0.8<BR>
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<B>Previous Version</B>: <A HREF=v4.0.7.html>v4.0.7</a><BR>
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<B>Master Download Site</B>: <A HREF="https://download.osgeo.org/libtiff">
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download.osgeo.org</a>, directory pub/libtiff</A><BR>
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<B>Master HTTP Site #1</B>: <A HREF="http://www.simplesystems.org/libtiff/">
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http://www.simplesystems.org/libtiff/</a><BR>
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<B>Master HTTP Site #2</B>: <A HREF="http://libtiff.maptools.org/">
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http://libtiff.maptools.org/</a>
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<HR SIZE=4 WIDTH=65% ALIGN=left>
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</UL>
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<P>
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This document describes the changes made to the software between the
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<I>previous</I> and <I>current</I> versions (see above). If you don't
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find something listed here, then it was not done in this timeframe, or
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it was not considered important enough to be mentioned. The following
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information is located here:
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<UL>
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<LI><A HREF="#highlights">Major Changes</A>
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<LI><A HREF="#configure">Changes in the software configuration</A>
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<LI><A HREF="#libtiff">Changes in libtiff</A>
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<LI><A HREF="#tools">Changes in the tools</A>
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<LI><A HREF="#contrib">Changes in the contrib area</A>
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</UL>
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<p>
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<P><HR WIDTH=65% ALIGN=left>
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<!--------------------------------------------------------------------------->
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<A NAME="highlights"><B><FONT SIZE=+3>M</FONT>AJOR CHANGES:</B></A>
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<UL>
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<LI> None
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</UL>
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<P><HR WIDTH=65% ALIGN=left>
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<!--------------------------------------------------------------------------->
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<A NAME="configure"><B><FONT SIZE=+3>C</FONT>HANGES IN THE SOFTWARE CONFIGURATION:</B></A>
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<UL>
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<LI> None
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</UL>
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<P><HR WIDTH=65% ALIGN=left>
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<!--------------------------------------------------------------------------->
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<A NAME="libtiff"><B><FONT SIZE=+3>C</FONT>HANGES IN LIBTIFF:</B></A>
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<UL>
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<LI> libtiff/tif_getimage.c, libtiff/tif_open.c: add parenthesis
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to fix cppcheck clarifyCalculation warnings *
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libtiff/tif_predict.c, libtiff/tif_print.c: fix printf
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unsigned vs signed formatting (cppcheck
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invalidPrintfArgType_uint warnings)
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<LI> libtiff/tif_read.c, libtiff/tiffiop.h: fix uint32 overflow in
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TIFFReadEncodedStrip() that caused an integer division by
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zero. Reported by Agostino Sarubbo. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2596
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<LI> libtiff/tif_pixarlog.c, libtiff/tif_luv.c: fix heap-based
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buffer overflow on generation of PixarLog / LUV compressed
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files, with ColorMap, TransferFunction attached and nasty
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plays with bitspersample. The fix for LUV has not been
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tested, but suffers from the same kind of issue of PixarLog.
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Reported by Agostino Sarubbo. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2604
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<LI> libtiff/tif_strip.c: revert the change in
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TIFFNumberOfStrips() done for
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http://bugzilla.maptools.org/show_bug.cgi?id=2587 /
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CVE-2016-9273 since the above change is a better fix that
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makes it unnecessary.
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<LI> libtiff/tif_dirread.c: modify ChopUpSingleUncompressedStrip()
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to instanciate compute ntrips as
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TIFFhowmany_32(td->td_imagelength, rowsperstrip), instead of a
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logic based on the total size of data. Which is faulty is the
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total size of data is not sufficient to fill the whole image,
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and thus results in reading outside of the
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StripByCounts/StripOffsets arrays when using
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TIFFReadScanline(). Reported by Agostino Sarubbo. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2608.
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<LI> libtiff/tif_ojpeg.c: make OJPEGDecode() early exit in case of
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failure in OJPEGPreDecode(). This will avoid a divide by zero,
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and potential other issues. Reported by Agostino Sarubbo.
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Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2611
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<LI> libtiff/tif_write.c: fix misleading indentation as warned by GCC.
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<LI> libtiff/tif_fax3.h: revert change done on 2016-01-09 that
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made Param member of TIFFFaxTabEnt structure a uint16 to
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reduce size of the binary. It happens that the Hylafax
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software uses the tables that follow this typedef
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(TIFFFaxMainTable, TIFFFaxWhiteTable, TIFFFaxBlackTable),
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although they are not in a public libtiff header. Raised by
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Lee Howard. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2636
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<LI> libtiff/tiffio.h, libtiff/tif_getimage.c: add
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TIFFReadRGBAStripExt() and TIFFReadRGBATileExt() variants of
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the functions without ext, with an extra argument to control
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the stop_on_error behaviour.
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<LI> libtiff/tif_getimage.c: fix potential memory leaks in error
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code path of TIFFRGBAImageBegin(). Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2627
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<LI> libtiff/tif_jpeg.c: increase libjpeg max memory usable to 10
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MB instead of libjpeg 1MB default. This helps when creating
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files with "big" tile, without using libjpeg temporary files.
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Related to https://trac.osgeo.org/gdal/ticket/6757
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<LI> libtiff/tif_jpeg.c: avoid integer division by zero in
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JPEGSetupEncode() when horizontal or vertical sampling is set
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to 0. Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2653
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<LI> libtiff/tif_dirwrite.c: in
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TIFFWriteDirectoryTagCheckedRational, replace assertion by
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runtime check to error out if passed value is strictly
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negative. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2535
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<LI> libtiff/tif_dirread.c: avoid division by floating point 0 in
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TIFFReadDirEntryCheckedRational() and
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TIFFReadDirEntryCheckedSrational(), and return 0 in that case
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(instead of infinity as before presumably) Apparently some
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sanitizers do not like those divisions by zero. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2644
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<LI> libtiff/tif_dir.c, tif_dirread.c, tif_dirwrite.c: implement
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various clampings of double to other data types to avoid
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undefined behaviour if the output range isn't big enough to
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hold the input value. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2643
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http://bugzilla.maptools.org/show_bug.cgi?id=2642
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http://bugzilla.maptools.org/show_bug.cgi?id=2646
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http://bugzilla.maptools.org/show_bug.cgi?id=2647
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<LI> libtiff/tif_jpeg.c: validate BitsPerSample in
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JPEGSetupEncode() to avoid undefined behaviour caused by
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invalid shift exponent. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2648
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<LI> libtiff/tif_read.c: avoid potential undefined behaviour on
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signed integer addition in TIFFReadRawStrip1() in isMapped()
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case. Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2650
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<LI> libtiff/tif_getimage.c: add explicit uint32 cast in
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putagreytile to avoid UndefinedBehaviorSanitizer warning.
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Patch by Nicolás Peña. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2658
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<LI> libtiff/tif_read.c: TIFFReadBufferSetup(): use _TIFFcalloc()
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to zero initialize tif_rawdata. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2651
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<LI> libtiff/tiffio.h, tif_unix.c, tif_win32.c, tif_vms.c: add
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_TIFFcalloc()
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<LI> libtiff/tif_luv.c, tif_lzw.c, tif_packbits.c: return 0 in
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Encode functions instead of -1 when TIFFFlushData1() fails.
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Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2130
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<LI> libtiff/tif_ojpeg.c: fix leak in
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OJPEGReadHeaderInfoSecTablesQTable,
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OJPEGReadHeaderInfoSecTablesDcTable and
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OJPEGReadHeaderInfoSecTablesAcTable when read fails. Patch by
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Nicolás Peña. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2659
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<LI> libtiff/tif_jpeg.c: only run JPEGFixupTagsSubsampling() if
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the YCbCrSubsampling tag is not explicitly present. This helps
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a bit to reduce the I/O amount when the tag is present
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(especially on cloud hosted files).
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<LI> libtiff/tif_lzw.c: in LZWPostEncode(), increase, if
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necessary, the code bit-width after flushing the remaining
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code and before emitting the EOI code. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=1982
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<LI> libtiff/tif_pixarlog.c: fix memory leak in error code path of
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PixarLogSetupDecode(). Patch by Nicolás Peña. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2665
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<LI> libtiff/tif_fax3.c, tif_predict.c, tif_getimage.c: fix GCC 7
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-Wimplicit-fallthrough warnings.
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<LI> libtiff/tif_dirread.c: fix memory leak in non
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DEFER_STRILE_LOAD mode (ie default) when there is both a
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StripOffsets and TileOffsets tag, or a StripByteCounts and
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TileByteCounts Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2689
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<LI> libtiff/tif_ojpeg.c: fix potential memory leak in
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OJPEGReadHeaderInfoSecTablesQTable,
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OJPEGReadHeaderInfoSecTablesDcTable and
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OJPEGReadHeaderInfoSecTablesAcTable Patch by Nicolás Peña.
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Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2670
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<LI> libtiff/tif_fax3.c: avoid crash in Fax3Close() on empty file.
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Patch by Alan Coopersmith + complement by myself. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2673
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<LI> libtiff/tif_read.c: TIFFFillStrip(): add limitation to the
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number of bytes read in case td_stripbytecount[strip] is
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bigger than reasonable, so as to avoid excessive memory
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allocation.
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<LI> libtiff/tif_zip.c, tif_pixarlog.c, tif_predict.c: fix memory
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leak when the underlying codec (ZIP, PixarLog) succeeds its
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setupdecode() method, but PredictorSetup fails. Credit to
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OSS-Fuzz (locally run, on GDAL)
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<LI> libtiff/tif_read.c: TIFFFillStrip() and TIFFFillTile(): avoid
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excessive memory allocation in case of shorten files. Only
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effective on 64 bit builds and non-mapped cases. Credit to
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OSS-Fuzz (locally run, on GDAL)
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<LI> libtiff/tif_read.c: TIFFFillStripPartial() / TIFFSeek(),
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avoid potential integer overflows with read_ahead in
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CHUNKY_STRIP_READ_SUPPORT mode. Should
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especially occur on 32 bit platforms.
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<LI> libtiff/tif_read.c: TIFFFillStripPartial(): avoid excessive
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memory allocation in case of shorten files. Only effective on
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64 bit builds. Credit to OSS-Fuzz (locally run, on GDAL)
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<LI> libtiff/tif_read.c: update tif_rawcc in
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CHUNKY_STRIP_READ_SUPPORT mode with tif_rawdataloaded when
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calling TIFFStartStrip() or TIFFFillStripPartial(). This
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avoids reading beyond tif_rawdata when bytecount >
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tif_rawdatasize. Fixes
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https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=1545.
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Credit to OSS-Fuzz
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<LI> libtiff/tif_color.c: avoid potential int32 overflow in
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TIFFYCbCrToRGBInit() Fixes
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https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=1533
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Credit to OSS-Fuzz
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<LI> libtiff/tif_pixarlog.c, tif_luv.c: avoid potential int32
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overflows in multiply_ms() and add_ms(). Fixes
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https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=1558
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Credit to OSS-Fuzz
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<LI> libtiff/tif_packbits.c: fix out-of-buffer read in
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PackBitsDecode() Fixes
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https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=1563
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Credit to OSS-Fuzz
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<LI> libtiff/tif_luv.c: LogL16InitState(): avoid excessive memory
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allocation when RowsPerStrip tag is missing.
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Credit to OSS-Fuzz (locally run, on GDAL)
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<LI> libtiff/tif_lzw.c: update dec_bitsleft at beginning of
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LZWDecode(), and update tif_rawcc at end of LZWDecode(). This
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is needed to properly work with the latest chnges in
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tif_read.c in CHUNKY_STRIP_READ_SUPPORT mode.
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<LI> libtiff/tif_pixarlog.c: PixarLogDecode(): resync tif_rawcp
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with next_in and tif_rawcc with avail_in at beginning and end
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of function, similarly to what is done in LZWDecode(). Likely
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needed so that it works properly with latest chnges in
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tif_read.c in CHUNKY_STRIP_READ_SUPPORT mode. But untested...
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<LI> libtiff/tif_getimage.c: initYCbCrConversion(): add basic
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validation of luma and refBlackWhite coefficients (just check
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they are not NaN for now), to avoid potential float to int
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overflows. Fixes
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https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=1663
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Credit to OSS Fuzz
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<LI> libtiff/tif_read.c: _TIFFVSetField(): fix outside range cast
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of double to float. Credit to Google Autofuzz project
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<LI> libtiff/tif_getimage.c: initYCbCrConversion(): check luma[1]
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is not zero to avoid division by zero. Fixes
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https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=1665
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Credit to OSS Fuzz
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<LI> libtiff/tif_read.c: _TIFFVSetField(): fix outside range cast
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of double to float. Credit to Google Autofuzz project
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<LI> libtiff/tif_getimage.c: initYCbCrConversion(): check luma[1]
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is not zero to avoid division by zero. Fixes
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https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=1665
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Credit to OSS Fuzz
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<LI> libtiff/tif_getimage.c: initYCbCrConversion(): stricter
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validation for refBlackWhite coefficients values. To avoid
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invalid float->int32 conversion. Fixes
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https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=1718
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Credit to OSS Fuzz
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</UL>
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<P><HR WIDTH=65% ALIGN=left>
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<!-------------------------------------------------------------------------->
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<A NAME="tools"><B><FONT SIZE=+3>C</FONT>HANGES IN THE TOOLS:</B></A>
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<UL>
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<LI> tools/fax2tiff.c (main): Applied patch by Jörg Ahrens to fix
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passing client data for Win32 builds using tif_win32.c
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(USE_WIN32_FILEIO defined) for file I/O. Patch was provided
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via email on November 20, 2016.
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<LI> tools/tiffcp.c: avoid uint32 underflow in cpDecodedStrips
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that can cause various issues, such as buffer overflows in the
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library. Reported by Agostino Sarubbo. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2598
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<LI> tools/tiffcrop.c: fix readContigStripsIntoBuffer() in -i
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(ignore) mode so that the output buffer is correctly
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incremented to avoid write outside bounds. Reported by
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Agostino Sarubbo. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2620
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<LI> tools/tiffcrop.c: add 3 extra bytes at end of strip buffer in
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readSeparateStripsIntoBuffer() to avoid read outside of heap
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allocated buffer. Reported by Agostino Sarubbo. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2621
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<LI> tools/tiffcrop.c: fix integer division by zero when
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BitsPerSample is missing. Reported by Agostino Sarubbo.
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Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2619
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<LI> tools/tiffinfo.c: fix null pointer dereference in -r mode
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when the image has no StripByteCount tag. Reported by
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Agostino Sarubbo. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2594
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<LI> tools/tiffcp.c: avoid potential division by zero is
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BitsPerSamples tag is missing. Reported by Agostino Sarubbo.
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Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2597
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<LI> tools/tif_dir.c: when TIFFGetField(, TIFFTAG_NUMBEROFINKS, )
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is called, limit the return number of inks to SamplesPerPixel,
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so that code that parses ink names doesn't go past the end of
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the buffer. Reported by Agostino Sarubbo. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2599
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<LI> tools/tiffcp.c: avoid potential division by zero is
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BitsPerSamples tag is missing. Reported by Agostino Sarubbo.
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Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2607
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<LI> tools/tiffcp.c: fix uint32 underflow/overflow that can cause
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heap-based buffer overflow. Reported by Agostino Sarubbo.
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Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2610
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<LI> tools/tiffcp.c: replace assert( (bps % 8) == 0 ) by a non
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assert check. Reported by Agostino Sarubbo. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2605
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<LI> tools/tiff2ps.c: fix 2 heap-based buffer overflows (in
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PSDataBW and PSDataColorContig). Reported by Agostino Sarubbo.
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Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2633 and
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http://bugzilla.maptools.org/show_bug.cgi?id=2634.
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<LI> tools/tiff2pdf.c: prevent heap-based buffer overflow in -j
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mode on a paletted image. Note: this fix errors out before the
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overflow happens. There could probably be a better fix. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2635
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<LI> tools/tiff2pdf.c: fix wrong usage of memcpy() that can
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trigger unspecified behaviour. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2638
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<LI> tools/tiff2pdf.c: avoid potential invalid memory read in
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t2p_writeproc. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2639
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<LI> tools/tiff2pdf.c: avoid potential heap-based overflow in
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t2p_readwrite_pdf_image_tile(). Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2640
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<LI> tools/tiffcrop.c: remove extraneous TIFFClose() in error code
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path, that caused double free. Related to
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http://bugzilla.maptools.org/show_bug.cgi?id=2535
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<LI> tools/tiffcp.c: error out cleanly in cpContig2SeparateByRow
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and cpSeparate2ContigByRow if BitsPerSample != 8 to avoid heap
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based overflow. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2656 and
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http://bugzilla.maptools.org/show_bug.cgi?id=2657
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<LI> tools/raw2tiff.c: avoid integer division by zero. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2631
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<LI> tools/tiff2ps.c: call TIFFClose() in error code paths.
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<LI> tools/fax2tiff.c: emit appropriate message if the input file
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is empty. Patch by Alan Coopersmith. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2672
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<LI> tools/tiff2bw.c: close TIFF handle in error code path. Fixes
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http://bugzilla.maptools.org/show_bug.cgi?id=2677
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<A NAME="contrib"><B><FONT SIZE=+3>C</FONT>HANGES IN THE CONTRIB AREA:</B></A>
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Last updated $Date: 2017-05-21 17:47:46 $.
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