--- gd-2.0.33/gd_png.c.orig	2004-10-28 22:09:52 +0400
+++ gd-2.0.33/gd_png.c	2004-11-12 16:31:49 +0300
@@ -188,6 +188,14 @@
 
   png_get_IHDR (png_ptr, info_ptr, &width, &height, &bit_depth, &color_type,
 		&interlace_type, NULL, NULL);
+  if (overflow2(sizeof (int), width)) 
+    {
+      return NULL;
+    }
+  if (overflow2(sizeof (int) * width, height)) 
+    {
+      return NULL;
+    }  
   if ((color_type == PNG_COLOR_TYPE_RGB) ||
       (color_type == PNG_COLOR_TYPE_RGB_ALPHA))
     {