@@ 1,113 0,0 @@
-Fixes CVE-2017-7593 (Potential uninitialized-memory access from tif_rawdata):
-
-http://bugzilla.maptools.org/show_bug.cgi?id=2651
-https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7593
-https://security-tracker.debian.org/tracker/CVE-2017-7593
-
-2017-01-11 Even Rouault <even.rouault at spatialys.com>
-
- * libtiff/tiffio.h, tif_unix.c, tif_win32.c, tif_vms.c: add
- _TIFFcalloc()
-
- * libtiff/tif_read.c: TIFFReadBufferSetup(): use _TIFFcalloc() to zero
- initialize tif_rawdata.
- Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2651
-
-/cvs/maptools/cvsroot/libtiff/ChangeLog,v <-- ChangeLog
-new revision: 1.1208; previous revision: 1.1207
-/cvs/maptools/cvsroot/libtiff/libtiff/tif_read.c,v <-- libtiff/tif_read.c
-new revision: 1.53; previous revision: 1.52
-/cvs/maptools/cvsroot/libtiff/libtiff/tif_unix.c,v <-- libtiff/tif_unix.c
-new revision: 1.28; previous revision: 1.27
-/cvs/maptools/cvsroot/libtiff/libtiff/tif_vms.c,v <-- libtiff/tif_vms.c
-new revision: 1.14; previous revision: 1.13
-/cvs/maptools/cvsroot/libtiff/libtiff/tif_win32.c,v <-- libtiff/tif_win32.c
-new revision: 1.42; previous revision: 1.41
-/cvs/maptools/cvsroot/libtiff/libtiff/tiffio.h,v <-- libtiff/tiffio.h
-new revision: 1.94; previous revision: 1.93
-
-diff -ru tiff-4.0.7/libtiff/tiffio.h tiff-4.0.7.new/libtiff/tiffio.h
---- tiff-4.0.7/libtiff/tiffio.h 1969-12-31 19:00:00.000000000 -0500
-+++ tiff-4.0.7.new/libtiff/tiffio.h 2017-05-05 19:08:03.772999790 -0400
-@@ -1,4 +1,4 @@
--/* $Id: tiffio.h,v 1.92 2016-01-23 21:20:34 erouault Exp $ */
-+/* $Id: tiffio.h,v 1.94 2017-01-11 19:02:49 erouault Exp $ */
-
- /*
- * Copyright (c) 1988-1997 Sam Leffler
-@@ -293,6 +293,7 @@
- */
-
- extern void* _TIFFmalloc(tmsize_t s);
-+extern void* _TIFFcalloc(tmsize_t nmemb, tmsize_t siz);
- extern void* _TIFFrealloc(void* p, tmsize_t s);
- extern void _TIFFmemset(void* p, int v, tmsize_t c);
- extern void _TIFFmemcpy(void* d, const void* s, tmsize_t c);
-diff -ru tiff-4.0.7/libtiff/tif_read.c tiff-4.0.7.new/libtiff/tif_read.c
---- tiff-4.0.7/libtiff/tif_read.c 2017-05-05 19:04:09.740966642 -0400
-+++ tiff-4.0.7.new/libtiff/tif_read.c 2017-05-05 18:59:11.070709441 -0400
-@@ -1,4 +1,4 @@
--/* $Id: tif_read.c,v 1.50 2016-12-02 21:56:56 erouault Exp $ */
-+/* $Id: tif_read.c,v 1.53 2017-01-11 19:02:49 erouault Exp $ */
-
- /*
- * Copyright (c) 1988-1997 Sam Leffler
-@@ -976,7 +976,9 @@
- "Invalid buffer size");
- return (0);
- }
-- tif->tif_rawdata = (uint8*) _TIFFmalloc(tif->tif_rawdatasize);
-+ /* Initialize to zero to avoid uninitialized buffers in case of */
-+ /* short reads (http://bugzilla.maptools.org/show_bug.cgi?id=2651) */
-+ tif->tif_rawdata = (uint8*) _TIFFcalloc(1, tif->tif_rawdatasize);
- tif->tif_flags |= TIFF_MYBUFFER;
- }
- if (tif->tif_rawdata == NULL) {
-diff -ru tiff-4.0.7/libtiff/tif_unix.c tiff-4.0.7.new/libtiff/tif_unix.c
---- tiff-4.0.7/libtiff/tif_unix.c 1969-12-31 19:00:00.000000000 -0500
-+++ tiff-4.0.7.new/libtiff/tif_unix.c 2017-05-05 19:10:48.302645187 -0400
-@@ -1,4 +1,4 @@
--/* $Id: tif_unix.c,v 1.27 2015-08-19 02:31:04 bfriesen Exp $ */
-+/* $Id: tif_unix.c,v 1.28 2017-01-11 19:02:49 erouault Exp $ */
-
- /*
- * Copyright (c) 1988-1997 Sam Leffler
-@@ -316,6 +316,14 @@
- return (malloc((size_t) s));
- }
-
-+void* _TIFFcalloc(tmsize_t nmemb, tmsize_t siz)
-+{
-+ if( nmemb == 0 || siz == 0 )
-+ return ((void *) NULL);
-+
-+ return calloc((size_t) nmemb, (size_t)siz);
-+}
-+
- void
- _TIFFfree(void* p)
- {
-diff -ru tiff-4.0.7/libtiff/tif_win32.c tiff-4.0.7.new/libtiff/tif_win32.c
---- tiff-4.0.7/libtiff/tif_win32.c 1969-12-31 19:00:00.000000000 -0500
-+++ tiff-4.0.7.new/libtiff/tif_win32.c 2017-05-05 19:13:06.903399627 -0400
-@@ -1,4 +1,4 @@
--/* $Id: tif_win32.c,v 1.41 2015-08-23 20:12:44 bfriesen Exp $ */
-+/* $Id: tif_win32.c,v 1.42 2017-01-11 19:02:49 erouault Exp $ */
-
- /*
- * Copyright (c) 1988-1997 Sam Leffler
-@@ -360,6 +360,14 @@
- return (malloc((size_t) s));
- }
-
-+void* _TIFFcalloc(tmsize_t nmemb, tmsize_t siz)
-+{
-+ if( nmemb == 0 || siz == 0 )
-+ return ((void *) NULL);
-+
-+ return calloc((size_t) nmemb, (size_t)siz);
-+}
-+
- void
- _TIFFfree(void* p)
- {
@@ 1,449 0,0 @@
-Fixes CVE-2017-{7595,7596,7597,7598,7599,7600,7601,7602}:
-
-https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7595
-https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7596
-https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7597
-https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7598
-https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7599
-https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7600
-https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7601
-https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7602
-
-2017-01-11 Even Rouault <even.rouault at spatialys.com>
-
- * libtiff/tif_dir.c, tif_dirread.c, tif_dirwrite.c: implement various
- clampings
- of double to other data types to avoid undefined behaviour if the
- output range
- isn't big enough to hold the input value.
- Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2643
- http://bugzilla.maptools.org/show_bug.cgi?id=2642
- http://bugzilla.maptools.org/show_bug.cgi?id=2646
- http://bugzilla.maptools.org/show_bug.cgi?id=2647
-
-/cvs/maptools/cvsroot/libtiff/ChangeLog,v <-- ChangeLog
-new revision: 1.1204; previous revision: 1.1203
-/cvs/maptools/cvsroot/libtiff/libtiff/tif_dir.c,v <-- libtiff/tif_dir.c
-new revision: 1.129; previous revision: 1.128
-/cvs/maptools/cvsroot/libtiff/libtiff/tif_dirread.c,v <-- libtiff/tif_dirread.c
-new revision: 1.207; previous revision: 1.206
-/cvs/maptools/cvsroot/libtiff/libtiff/tif_dirwrite.c,v <-- libtiff/tif_dirwrite.c
-new revision: 1.85; previous revision: 1.84
-
-2017-01-11 Even Rouault <even.rouault at spatialys.com>
-
- * libtiff/tif_dirread.c: avoid division by floating point 0 in
- TIFFReadDirEntryCheckedRational() and
- TIFFReadDirEntryCheckedSrational(),
- and return 0 in that case (instead of infinity as before presumably)
- Apparently some sanitizers do not like those divisions by zero.
- Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2644
-
-/cvs/maptools/cvsroot/libtiff/ChangeLog,v <-- ChangeLog
-new revision: 1.1203; previous revision: 1.1202
-/cvs/maptools/cvsroot/libtiff/libtiff/tif_dirread.c,v <-- libtiff/tif_dirread.c
-new revision: 1.206; previous revision: 1.205
-
-2017-01-11 Even Rouault <even.rouault at spatialys.com>
-
- * libtiff/tif_jpeg.c: validate BitsPerSample in JPEGSetupEncode() to
- avoid undefined behaviour caused by invalid shift exponent.
- Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2648
-
-
-/cvs/maptools/cvsroot/libtiff/ChangeLog,v <-- ChangeLog
-new revision: 1.1205; previous revision: 1.1204
-/cvs/maptools/cvsroot/libtiff/libtiff/tif_jpeg.c,v <-- libtiff/tif_jpeg.c
-new revision: 1.126; previous revision: 1.125
-
-2017-01-11 Even Rouault <even.rouault at spatialys.com>
-
- * libtiff/tif_read.c: avoid potential undefined behaviour on signed
- integer addition in TIFFReadRawStrip1() in isMapped() case.
- Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2650
-
-/cvs/maptools/cvsroot/libtiff/ChangeLog,v <-- ChangeLog
-new revision: 1.1206; previous revision: 1.1205
-/cvs/maptools/cvsroot/libtiff/libtiff/tif_read.c,v <-- libtiff/tif_read.c
-new revision: 1.51; previous revision: 1.50
-
-Index: libtiff/libtiff/tif_dir.c
-===================================================================
-RCS file: /cvs/maptools/cvsroot/libtiff/libtiff/tif_dir.c,v
-retrieving revision 1.128
-retrieving revision 1.129
-diff -u -r1.128 -r1.129
---- libtiff/libtiff/tif_dir.c 3 Dec 2016 15:30:31 -0000 1.128
-+++ libtiff/libtiff/tif_dir.c 11 Jan 2017 16:09:02 -0000 1.129
-@@ -1,4 +1,4 @@
--/* $Id: tif_dir.c,v 1.128 2016-12-03 15:30:31 erouault Exp $ */
-+/* $Id: tif_dir.c,v 1.129 2017-01-11 16:09:02 erouault Exp $ */
-
- /*
- * Copyright (c) 1988-1997 Sam Leffler
-@@ -31,6 +31,7 @@
- * (and also some miscellaneous stuff)
- */
- #include "tiffiop.h"
-+#include <float.h>
-
- /*
- * These are used in the backwards compatibility code...
-@@ -154,6 +155,15 @@
- return (0);
- }
-
-+static float TIFFClampDoubleToFloat( double val )
-+{
-+ if( val > FLT_MAX )
-+ return FLT_MAX;
-+ if( val < -FLT_MAX )
-+ return -FLT_MAX;
-+ return (float)val;
-+}
-+
- static int
- _TIFFVSetField(TIFF* tif, uint32 tag, va_list ap)
- {
-@@ -312,13 +322,13 @@
- dblval = va_arg(ap, double);
- if( dblval < 0 )
- goto badvaluedouble;
-- td->td_xresolution = (float) dblval;
-+ td->td_xresolution = TIFFClampDoubleToFloat( dblval );
- break;
- case TIFFTAG_YRESOLUTION:
- dblval = va_arg(ap, double);
- if( dblval < 0 )
- goto badvaluedouble;
-- td->td_yresolution = (float) dblval;
-+ td->td_yresolution = TIFFClampDoubleToFloat( dblval );
- break;
- case TIFFTAG_PLANARCONFIG:
- v = (uint16) va_arg(ap, uint16_vap);
-@@ -327,10 +337,10 @@
- td->td_planarconfig = (uint16) v;
- break;
- case TIFFTAG_XPOSITION:
-- td->td_xposition = (float) va_arg(ap, double);
-+ td->td_xposition = TIFFClampDoubleToFloat( va_arg(ap, double) );
- break;
- case TIFFTAG_YPOSITION:
-- td->td_yposition = (float) va_arg(ap, double);
-+ td->td_yposition = TIFFClampDoubleToFloat( va_arg(ap, double) );
- break;
- case TIFFTAG_RESOLUTIONUNIT:
- v = (uint16) va_arg(ap, uint16_vap);
-Index: libtiff/libtiff/tif_dirread.c
-===================================================================
-RCS file: /cvs/maptools/cvsroot/libtiff/libtiff/tif_dirread.c,v
-retrieving revision 1.206
-retrieving revision 1.207
-diff -u -r1.206 -r1.207
---- libtiff/libtiff/tif_dirread.c 11 Jan 2017 13:28:01 -0000 1.206
-+++ libtiff/libtiff/tif_dirread.c 11 Jan 2017 16:09:02 -0000 1.207
-@@ -1,4 +1,4 @@
--/* $Id: tif_dirread.c,v 1.205 2016-12-03 11:02:15 erouault Exp $ */
-+/* $Id: tif_dirread.c,v 1.207 2017-01-11 16:09:02 erouault Exp $ */
-
- /*
- * Copyright (c) 1988-1997 Sam Leffler
-@@ -40,6 +40,7 @@
- */
-
- #include "tiffiop.h"
-+#include <float.h>
-
- #define IGNORE 0 /* tag placeholder used below */
- #define FAILED_FII ((uint32) -1)
-@@ -2406,7 +2407,14 @@
- ma=(double*)origdata;
- mb=data;
- for (n=0; n<count; n++)
-- *mb++=(float)(*ma++);
-+ {
-+ double val = *ma++;
-+ if( val > FLT_MAX )
-+ val = FLT_MAX;
-+ else if( val < -FLT_MAX )
-+ val = -FLT_MAX;
-+ *mb++=(float)val;
-+ }
- }
- break;
- }
-Index: libtiff/libtiff/tif_dirwrite.c
-===================================================================
-RCS file: /cvs/maptools/cvsroot/libtiff/libtiff/tif_dirwrite.c,v
-retrieving revision 1.84
-retrieving revision 1.85
-diff -u -r1.84 -r1.85
---- libtiff/libtiff/tif_dirwrite.c 11 Jan 2017 12:51:59 -0000 1.84
-+++ libtiff/libtiff/tif_dirwrite.c 11 Jan 2017 16:09:02 -0000 1.85
-@@ -1,4 +1,4 @@
--/* $Id: tif_dirwrite.c,v 1.83 2016-10-25 21:35:15 erouault Exp $ */
-+/* $Id: tif_dirwrite.c,v 1.85 2017-01-11 16:09:02 erouault Exp $ */
-
- /*
- * Copyright (c) 1988-1997 Sam Leffler
-@@ -30,6 +30,7 @@
- * Directory Write Support Routines.
- */
- #include "tiffiop.h"
-+#include <float.h>
-
- #ifdef HAVE_IEEEFP
- #define TIFFCvtNativeToIEEEFloat(tif, n, fp)
-@@ -939,6 +940,69 @@
- return(0);
- }
-
-+static float TIFFClampDoubleToFloat( double val )
-+{
-+ if( val > FLT_MAX )
-+ return FLT_MAX;
-+ if( val < -FLT_MAX )
-+ return -FLT_MAX;
-+ return (float)val;
-+}
-+
-+static int8 TIFFClampDoubleToInt8( double val )
-+{
-+ if( val > 127 )
-+ return 127;
-+ if( val < -128 || val != val )
-+ return -128;
-+ return (int8)val;
-+}
-+
-+static int16 TIFFClampDoubleToInt16( double val )
-+{
-+ if( val > 32767 )
-+ return 32767;
-+ if( val < -32768 || val != val )
-+ return -32768;
-+ return (int16)val;
-+}
-+
-+static int32 TIFFClampDoubleToInt32( double val )
-+{
-+ if( val > 0x7FFFFFFF )
-+ return 0x7FFFFFFF;
-+ if( val < -0x7FFFFFFF-1 || val != val )
-+ return -0x7FFFFFFF-1;
-+ return (int32)val;
-+}
-+
-+static uint8 TIFFClampDoubleToUInt8( double val )
-+{
-+ if( val < 0 )
-+ return 0;
-+ if( val > 255 || val != val )
-+ return 255;
-+ return (uint8)val;
-+}
-+
-+static uint16 TIFFClampDoubleToUInt16( double val )
-+{
-+ if( val < 0 )
-+ return 0;
-+ if( val > 65535 || val != val )
-+ return 65535;
-+ return (uint16)val;
-+}
-+
-+static uint32 TIFFClampDoubleToUInt32( double val )
-+{
-+ if( val < 0 )
-+ return 0;
-+ if( val > 0xFFFFFFFFU || val != val )
-+ return 0xFFFFFFFFU;
-+ return (uint32)val;
-+}
-+
- static int
- TIFFWriteDirectoryTagSampleformatArray(TIFF* tif, uint32* ndir, TIFFDirEntry* dir, uint16 tag, uint32 count, double* value)
- {
-@@ -959,7 +1023,7 @@
- if (tif->tif_dir.td_bitspersample<=32)
- {
- for (i = 0; i < count; ++i)
-- ((float*)conv)[i] = (float)value[i];
-+ ((float*)conv)[i] = TIFFClampDoubleToFloat(value[i]);
- ok = TIFFWriteDirectoryTagFloatArray(tif,ndir,dir,tag,count,(float*)conv);
- }
- else
-@@ -971,19 +1035,19 @@
- if (tif->tif_dir.td_bitspersample<=8)
- {
- for (i = 0; i < count; ++i)
-- ((int8*)conv)[i] = (int8)value[i];
-+ ((int8*)conv)[i] = TIFFClampDoubleToInt8(value[i]);
- ok = TIFFWriteDirectoryTagSbyteArray(tif,ndir,dir,tag,count,(int8*)conv);
- }
- else if (tif->tif_dir.td_bitspersample<=16)
- {
- for (i = 0; i < count; ++i)
-- ((int16*)conv)[i] = (int16)value[i];
-+ ((int16*)conv)[i] = TIFFClampDoubleToInt16(value[i]);
- ok = TIFFWriteDirectoryTagSshortArray(tif,ndir,dir,tag,count,(int16*)conv);
- }
- else
- {
- for (i = 0; i < count; ++i)
-- ((int32*)conv)[i] = (int32)value[i];
-+ ((int32*)conv)[i] = TIFFClampDoubleToInt32(value[i]);
- ok = TIFFWriteDirectoryTagSlongArray(tif,ndir,dir,tag,count,(int32*)conv);
- }
- break;
-@@ -991,19 +1055,19 @@
- if (tif->tif_dir.td_bitspersample<=8)
- {
- for (i = 0; i < count; ++i)
-- ((uint8*)conv)[i] = (uint8)value[i];
-+ ((uint8*)conv)[i] = TIFFClampDoubleToUInt8(value[i]);
- ok = TIFFWriteDirectoryTagByteArray(tif,ndir,dir,tag,count,(uint8*)conv);
- }
- else if (tif->tif_dir.td_bitspersample<=16)
- {
- for (i = 0; i < count; ++i)
-- ((uint16*)conv)[i] = (uint16)value[i];
-+ ((uint16*)conv)[i] = TIFFClampDoubleToUInt16(value[i]);
- ok = TIFFWriteDirectoryTagShortArray(tif,ndir,dir,tag,count,(uint16*)conv);
- }
- else
- {
- for (i = 0; i < count; ++i)
-- ((uint32*)conv)[i] = (uint32)value[i];
-+ ((uint32*)conv)[i] = TIFFClampDoubleToUInt32(value[i]);
- ok = TIFFWriteDirectoryTagLongArray(tif,ndir,dir,tag,count,(uint32*)conv);
- }
- break;
-@@ -2102,7 +2102,7 @@
- m[0]=0;
- m[1]=1;
- }
-- else if (value==(double)(uint32)value)
-+ else if (value <= 0xFFFFFFFFU && value==(double)(uint32)value)
- {
- m[0]=(uint32)value;
- m[1]=1;
-@@ -2148,12 +2217,13 @@
- }
- for (na=value, nb=m, nc=0; nc<count; na++, nb+=2, nc++)
- {
-- if (*na<=0.0)
-+ if (*na<=0.0 || *na != *na)
- {
- nb[0]=0;
- nb[1]=1;
- }
-- else if (*na==(float)(uint32)(*na))
-+ else if (*na >= 0 && *na <= (float)0xFFFFFFFFU &&
-+ *na==(float)(uint32)(*na))
- {
- nb[0]=(uint32)(*na);
- nb[1]=1;
-Index: libtiff/libtiff/tif_dirread.c
-===================================================================
-RCS file: /cvs/maptools/cvsroot/libtiff/libtiff/tif_dirread.c,v
-retrieving revision 1.205
-retrieving revision 1.206
-diff -u -r1.205 -r1.206
---- libtiff/libtiff/tif_dirread.c 3 Dec 2016 11:02:15 -0000 1.205
-+++ libtiff/libtiff/tif_dirread.c 11 Jan 2017 13:28:01 -0000 1.206
-@@ -2872,7 +2872,10 @@
- m.l = direntry->tdir_offset.toff_long8;
- if (tif->tif_flags&TIFF_SWAB)
- TIFFSwabArrayOfLong(m.i,2);
-- if (m.i[0]==0)
-+ /* Not completely sure what we should do when m.i[1]==0, but some */
-+ /* sanitizers do not like division by 0.0: */
-+ /* http://bugzilla.maptools.org/show_bug.cgi?id=2644 */
-+ if (m.i[0]==0 || m.i[1]==0)
- *value=0.0;
- else
- *value=(double)m.i[0]/(double)m.i[1];
-@@ -2900,7 +2903,10 @@
- m.l=direntry->tdir_offset.toff_long8;
- if (tif->tif_flags&TIFF_SWAB)
- TIFFSwabArrayOfLong(m.i,2);
-- if ((int32)m.i[0]==0)
-+ /* Not completely sure what we should do when m.i[1]==0, but some */
-+ /* sanitizers do not like division by 0.0: */
-+ /* http://bugzilla.maptools.org/show_bug.cgi?id=2644 */
-+ if ((int32)m.i[0]==0 || m.i[1]==0)
- *value=0.0;
- else
- *value=(double)((int32)m.i[0])/(double)m.i[1];
-Index: libtiff/libtiff/tif_jpeg.c
-===================================================================
-RCS file: /cvs/maptools/cvsroot/libtiff/libtiff/tif_jpeg.c,v
-retrieving revision 1.125
-retrieving revision 1.126
-diff -u -r1.125 -r1.126
---- libtiff/libtiff/tif_jpeg.c 11 Jan 2017 12:15:01 -0000 1.125
-+++ libtiff/libtiff/tif_jpeg.c 11 Jan 2017 16:13:50 -0000 1.126
-@@ -1,4 +1,4 @@
--/* $Id: tif_jpeg.c,v 1.123 2016-01-23 21:20:34 erouault Exp $ */
-+/* $Id: tif_jpeg.c,v 1.126 2017-01-11 16:13:50 erouault Exp $ */
-
- /*
- * Copyright (c) 1994-1997 Sam Leffler
-@@ -1632,6 +1632,13 @@
- "Invalig horizontal/vertical sampling value");
- return (0);
- }
-+ if( td->td_bitspersample > 16 )
-+ {
-+ TIFFErrorExt(tif->tif_clientdata, module,
-+ "BitsPerSample %d not allowed for JPEG",
-+ td->td_bitspersample);
-+ return (0);
-+ }
-
- /*
- * A ReferenceBlackWhite field *must* be present since the
-Index: libtiff/libtiff/tif_read.c
-===================================================================
-RCS file: /cvs/maptools/cvsroot/libtiff/libtiff/tif_read.c,v
-retrieving revision 1.50
-retrieving revision 1.51
-diff -u -r1.50 -r1.51
---- libtiff/libtiff/tif_read.c 2 Dec 2016 21:56:56 -0000 1.50
-+++ libtiff/libtiff/tif_read.c 11 Jan 2017 16:33:34 -0000 1.51
-@@ -420,16 +420,25 @@
- return ((tmsize_t)(-1));
- }
- } else {
-- tmsize_t ma,mb;
-+ tmsize_t ma;
- tmsize_t n;
-- ma=(tmsize_t)td->td_stripoffset[strip];
-- mb=ma+size;
-- if ((td->td_stripoffset[strip] > (uint64)TIFF_TMSIZE_T_MAX)||(ma>tif->tif_size))
-- n=0;
-- else if ((mb<ma)||(mb<size)||(mb>tif->tif_size))
-- n=tif->tif_size-ma;
-- else
-- n=size;
-+ if ((td->td_stripoffset[strip] > (uint64)TIFF_TMSIZE_T_MAX)||
-+ ((ma=(tmsize_t)td->td_stripoffset[strip])>tif->tif_size))
-+ {
-+ n=0;
-+ }
-+ else if( ma > TIFF_TMSIZE_T_MAX - size )
-+ {
-+ n=0;
-+ }
-+ else
-+ {
-+ tmsize_t mb=ma+size;
-+ if (mb>tif->tif_size)
-+ n=tif->tif_size-ma;
-+ else
-+ n=size;
-+ }
- if (n!=size) {
- #if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
- TIFFErrorExt(tif->tif_clientdata, module,