Index: ntoskrnl/wmi/smbios.c
===================================================================
--- ntoskrnl/wmi/smbios.c	(revision 71111)
+++ ntoskrnl/wmi/smbios.c	(working copy)
@@ -196,6 +196,7 @@
         TableMapping = MmMapIoSpace(PhysicalAddress, TableSize, MmCached);
         if (TableMapping == NULL)
         {
+            ExFreePoolWithTag(BiosTables, 'BTMS');
             return STATUS_UNSUCCESSFUL;
         }