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--- libwmf-0.2.8.4/src/extra/gd/gd_png.c	2004-11-11 14:02:37.407589824 -0500
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+++ libwmf-0.2.8.4/src/extra/gd/gd_png.c	2004-11-11 14:04:29.672522960 -0500
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@@ -188,6 +188,14 @@
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   png_get_IHDR (png_ptr, info_ptr, &width, &height, &bit_depth, &color_type,
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 		&interlace_type, NULL, NULL);
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+  if (overflow2(sizeof (int), width)) 
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+    {
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+      return NULL;
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+    }
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+  if (overflow2(sizeof (int) * width, height)) 
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+    {
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+      return NULL;
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+    }  
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   if ((color_type == PNG_COLOR_TYPE_RGB) ||
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       (color_type == PNG_COLOR_TYPE_RGB_ALPHA))
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     {