--- /dev/null
+From 3144e57770c1e4d26520d8abee750f8ac8b75490 Mon Sep 17 00:00:00 2001
+From: erouault <erouault>
+Date: Wed, 11 Jan 2017 16:09:02 +0000
+Subject: [PATCH] * 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
+
+Upstream-Status: Backport
+
+CVE: CVE-2017-7596
+Signed-off-by: Rajkumar Veer <rveer@mvista.com>
+
+Index: tiff-4.0.7/ChangeLog
+===================================================================
+--- tiff-4.0.7.orig/ChangeLog 2017-04-25 15:53:40.294592812 +0530
++++ tiff-4.0.7/ChangeLog 2017-04-25 16:02:03.238600641 +0530
+@@ -6,6 +6,16 @@
+ Patch by Nicolás Peña.
+ Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2659
+
++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
++
+ 2017-01-11 Even Rouault <even.rouault at spatialys.com>
+
+ * libtiff/tif_jpeg.c: avoid integer division by zero in
+Index: tiff-4.0.7/libtiff/tif_dir.c
+===================================================================
+--- tiff-4.0.7.orig/libtiff/tif_dir.c 2016-10-30 04:33:18.856598072 +0530
++++ tiff-4.0.7/libtiff/tif_dir.c 2017-04-25 16:02:03.238600641 +0530
+@@ -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: tiff-4.0.7/libtiff/tif_dirread.c
+===================================================================
+--- tiff-4.0.7.orig/libtiff/tif_dirread.c 2017-04-25 15:53:40.134592810 +0530
++++ tiff-4.0.7/libtiff/tif_dirread.c 2017-04-25 16:02:03.242600641 +0530
+@@ -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: tiff-4.0.7/libtiff/tif_dirwrite.c
+===================================================================
+--- tiff-4.0.7.orig/libtiff/tif_dirwrite.c 2016-10-30 04:33:18.876854501 +0530
++++ tiff-4.0.7/libtiff/tif_dirwrite.c 2017-04-25 16:07:48.670606018 +0530
+@@ -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;
+@@ -2094,15 +2158,25 @@
+ static int
+ TIFFWriteDirectoryTagCheckedRational(TIFF* tif, uint32* ndir, TIFFDirEntry* dir, uint16 tag, double value)
+ {
++ static const char module[] = "TIFFWriteDirectoryTagCheckedRational";
+ uint32 m[2];
+- assert(value>=0.0);
+ assert(sizeof(uint32)==4);
+- if (value<=0.0)
++ if (value<0)
++ {
++ TIFFErrorExt(tif->tif_clientdata,module,"Negative value is illegal");
++ return 0;
++ }
++ else if( value != value )
++ {
++ TIFFErrorExt(tif->tif_clientdata,module,"Not-a-number value is illegal");
++ return 0;
++ }
++ else if (value==0.0)
+ {
+ 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;
+@@ -2143,7 +2217,7 @@
+ }
+ 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;
+@@ -2153,7 +2227,8 @@
+ nb[0]=(uint32)(*na);
+ nb[1]=1;
+ }
+- else if (*na<1.0)
++ else if (*na >= 0 && *na <= (float)0xFFFFFFFFU &&
++ *na==(float)(uint32)(*na))
+ {
+ nb[0]=(uint32)((double)(*na)*0xFFFFFFFF);
+ nb[1]=0xFFFFFFFF;
