File ImageMagick-CVE-2017-12663.patch of Package ImageMagick.8212

--- a/coders/map.c
+++ b/coders/map.c
@@ -396,12 +396,17 @@ static MagickBooleanType WriteMAPImage(const ImageInfo *image_info,Image *image)
     sizeof(*colormap));
   if ((pixels == (unsigned char *) NULL) ||
       (colormap == (unsigned char *) NULL))
-    ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
+    {
+      if (colormap != (unsigned char *) NULL)
+        colormap=(unsigned char *) RelinquishMagickMemory(colormap);
+      if (pixels != (unsigned char *) NULL)
+        pixels=(unsigned char *) RelinquishMagickMemory(pixels);
+      ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
+    }
   /*
     Write colormap to file.
   */
   q=colormap;
-  q=colormap;
   if (image->colors <= 256)
     for (i=0; i < (ssize_t) image->colors; i++)
     {