[NTOS:CM] Cleanup the hive in case linking it to master fails (#4969)

Currently the failure code path doesn't do any kind of cleanup against
the hive that was being linked to master. The cleanup is pretty
straightforward as you just simply close the hive file handles and free
the registry kernel structures.

CORE-5772
CORE-17263
CORE-13559

ntoskrnl/config/cmapi.c

@@ -2121,18 +2121,24 @@ CmLoadKey(IN POBJECT_ATTRIBUTES TargetKey,
         /* Release the hive */
         CmHive->Hive.HiveFlags &= ~HIVE_IS_UNLOADING;
         CmHive->CreatorOwner = NULL;
-
-        /* Allow loads */
-        ExReleasePushLock(&CmpLoadHiveLock);
     }
     else
     {
         DPRINT1("CmpLinkHiveToMaster failed, Status %lx\n", Status);
-        /* FIXME: TODO */
-        // ASSERT(FALSE); see CORE-17263
-        ExReleasePushLock(&CmpLoadHiveLock);
+
+        /* We're touching this hive, set the loading flag */
+        CmHive->HiveIsLoading = TRUE;
+
+        /* Close associated file handles */
+        CmpCloseHiveFiles(CmHive);
+
+        /* Cleanup its resources */
+        CmpDestroyHive(CmHive);
     }
 
+    /* Allow loads */
+    ExReleasePushLock(&CmpLoadHiveLock);
+
     /* Is this first profile load? */
     if (!CmpProfileLoaded && !CmpWasSetupBoot)
     {