Index: drivers/filesystems/udfs/udf_info/extent.cpp
===================================================================
--- drivers/filesystems/udfs/udf_info/extent.cpp	(revision 71259)
+++ drivers/filesystems/udfs/udf_info/extent.cpp	(working copy)
@@ -2154,6 +2154,7 @@
         Extent[i].extLocation = 0;
         Extent[i].extLength = (Extent[i].extLength & UDF_EXTENT_LENGTH_MASK) | flags;
         NewExtent = Extent;
+        Extent = NULL;
         AdPrint(("Alloc->Not (1) NewExtent = Extent = %x\n", NewExtent));
     } else
     if(l < BOffs) {
@@ -2207,15 +2208,17 @@
     if(Deallocate)
         UDFMarkSpaceAsXXX(Vcb, (-1), TmpExtInf.Mapping, AS_DISCARDED); // mark as free
 
+    ExtInfo->Modified = TRUE;
+    ExtInfo->Mapping = NewExtent;
+
+    AdPrint(("Alloc->Not: ExtInfo %x, Extent %x\n", ExtInfo, ExtInfo->Mapping));
+
     if(Extent) {
         AdPrint(("Alloc->Not kill %x\n", Extent));
         MyFreePool__(Extent);
     } else {
         AdPrint(("Alloc->Not keep %x\n", Extent));
-    }
-    ExtInfo->Modified = TRUE;
-    ExtInfo->Mapping = NewExtent;
-    AdPrint(("Alloc->Not: ExtInfo %x, Extent %x\n", ExtInfo, ExtInfo->Mapping));
+    }  
 
     return STATUS_SUCCESS;
 } // end UDFMarkAllocatedAsNotXXX()