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64 lines
2 KiB
Diff
64 lines
2 KiB
Diff
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Fix divide-by-zero in OJPEGDecodeRaw():
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http://bugzilla.maptools.org/show_bug.cgi?id=2611
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2016-12-03 Even Rouault <even.rouault at spatialys.com>
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* libtiff/tif_ojpeg.c: make OJPEGDecode() early exit in case of failure
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in
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OJPEGPreDecode(). This will avoid a divide by zero, and potential other
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issues.
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Reported by Agostino Sarubbo.
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Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2611
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/cvs/maptools/cvsroot/libtiff/ChangeLog,v <-- ChangeLog
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new revision: 1.1177; previous revision: 1.1176
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/cvs/maptools/cvsroot/libtiff/libtiff/tif_ojpeg.c,v <-- libtiff/tif_ojpeg.c
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new revision: 1.66; previous revision: 1.65
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Index: libtiff/libtiff/tif_ojpeg.c
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===================================================================
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RCS file: /cvs/maptools/cvsroot/libtiff/libtiff/tif_ojpeg.c,v
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retrieving revision 1.65
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retrieving revision 1.66
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diff -u -r1.65 -r1.66
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--- libtiff/libtiff/tif_ojpeg.c 4 Sep 2016 21:32:56 -0000 1.65
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+++ libtiff/libtiff/tif_ojpeg.c 3 Dec 2016 11:15:18 -0000 1.66
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@@ -1,4 +1,4 @@
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-/* $Id: tif_ojpeg.c,v 1.65 2016-09-04 21:32:56 erouault Exp $ */
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+/* $Id: tif_ojpeg.c,v 1.66 2016-12-03 11:15:18 erouault Exp $ */
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/* WARNING: The type of JPEG encapsulation defined by the TIFF Version 6.0
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specification is now totally obsolete and deprecated for new applications and
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@@ -244,6 +244,7 @@
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typedef struct {
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TIFF* tif;
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+ int decoder_ok;
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#ifndef LIBJPEG_ENCAP_EXTERNAL
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JMP_BUF exit_jmpbuf;
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#endif
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@@ -722,6 +723,7 @@
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}
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sp->write_curstrile++;
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}
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+ sp->decoder_ok = 1;
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return(1);
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}
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@@ -784,8 +786,14 @@
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static int
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OJPEGDecode(TIFF* tif, uint8* buf, tmsize_t cc, uint16 s)
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{
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+ static const char module[]="OJPEGDecode";
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OJPEGState* sp=(OJPEGState*)tif->tif_data;
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(void)s;
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+ if( !sp->decoder_ok )
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+ {
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+ TIFFErrorExt(tif->tif_clientdata,module,"Cannot decode: decoder not correctly initialized");
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+ return 0;
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+ }
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if (sp->libjpeg_jpeg_query_style==0)
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{
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if (OJPEGDecodeRaw(tif,buf,cc)==0)
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