1 files changed, 66 insertions, 0 deletions
diff --git a/wxgtk/overflow.patch b/wxgtk/overflow.patch
new file mode 100644
index 000000000..543bdff12
--- /dev/null
+++ b/wxgtk/overflow.patch
@@ -0,0 +1,66 @@
+Index: /wxWidgets/branches/WX_2_8_BRANCH/src/common/imagpng.cpp
+===================================================================
+--- /wxWidgets/branches/WX_2_8_BRANCH/src/common/imagpng.cpp (revision 53479)
++++ /wxWidgets/branches/WX_2_8_BRANCH/src/common/imagpng.cpp (revision 60875)
+@@ -569,5 +569,7 @@
+         goto error;
+ 
+-    lines = (unsigned char **)malloc( (size_t)(height * sizeof(unsigned char *)) );
++    // initialize all line pointers to NULL to ensure that they can be safely
++    // free()d if an error occurs before all of them could be allocated
++    lines = (unsigned char **)calloc(height, sizeof(unsigned char *));
+     if ( !lines )
+         goto error;
+@@ -576,9 +578,5 @@
+     {
+         if ((lines[i] = (unsigned char *)malloc( (size_t)(width * (sizeof(unsigned char) * 4)))) == NULL)
+-        {
+-            for ( unsigned int n = 0; n < i; n++ )
+-                free( lines[n] );
+             goto error;
+-        }
+     }
+ 
+Index: /wxWidgets/branches/WX_2_8_BRANCH/src/common/imagtiff.cpp
+===================================================================
+--- /wxWidgets/branches/WX_2_8_BRANCH/src/common/imagtiff.cpp (revision 48694)
++++ /wxWidgets/branches/WX_2_8_BRANCH/src/common/imagtiff.cpp (revision 60876)
+@@ -262,5 +262,4 @@
+ 
+     uint32 w, h;
+-    uint32 npixels;
+     uint32 *raster;
+ 
+@@ -276,7 +275,18 @@
+                             samplesInfo[0] == EXTRASAMPLE_UNASSALPHA));
+ 
+-    npixels = w * h;
+-
+-    raster = (uint32*) _TIFFmalloc( npixels * sizeof(uint32) );
++    // guard against integer overflow during multiplication which could result
++    // in allocating a too small buffer and then overflowing it
++    const double bytesNeeded = w * h * sizeof(uint32);
++    if ( bytesNeeded >= 4294967295U /* UINT32_MAX */ )
++    {
++        if ( verbose )
++            wxLogError( _("TIFF: Image size is abnormally big.") );
++
++        TIFFClose(tif);
++
++        return false;
++    }
++
++    raster = (uint32*) _TIFFmalloc( bytesNeeded );
+ 
+     if (!raster)
+Index: /wxWidgets/branches/WX_2_8_BRANCH/src/common/imagtiff.cpp
+===================================================================
+--- /wxWidgets/branches/WX_2_8_BRANCH/src/common/imagtiff.cpp (revision 60876)
++++ /wxWidgets/branches/WX_2_8_BRANCH/src/common/imagtiff.cpp (revision 60897)
+@@ -277,5 +277,5 @@
+     // guard against integer overflow during multiplication which could result
+     // in allocating a too small buffer and then overflowing it
+-    const double bytesNeeded = w * h * sizeof(uint32);
++    const double bytesNeeded = (double)w * (double)h * sizeof(uint32);
+     if ( bytesNeeded >= 4294967295U /* UINT32_MAX */ )
+     {