diff --git a/ospfd/ChangeLog b/ospfd/ChangeLog
index 32b39aa..34d7c4d 100644
--- a/ospfd/ChangeLog
+++ b/ospfd/ChangeLog
@@ -1,3 +1,11 @@
+2006-05-31 Paul Jakma <paul.jakma@sun.com>
+
+	* ospf_lsdb.c: (ospf_lsdb_delete) robustify against NULL arguments,
+	  print warning.
+	* ospf_lsa.c: (ospf_discard_from_db) ditto.
+	  (ospf_maxage_lsa_remover) Check lsa->lsdb for validity, possible
+	  mitigation (but not solution) for bug #269.
+
 2006-05-30 Paul Jakma <paul.jakma@sun.com>
 
 	* ospf_packet.c: (ospf_read) Debug message about packets
diff --git a/ospfd/ospf_lsa.c b/ospfd/ospf_lsa.c
index 7c3be3d..a0afbad 100644
--- a/ospfd/ospf_lsa.c
+++ b/ospfd/ospf_lsa.c
@@ -2679,6 +2679,17 @@
 {
   struct ospf_lsa *old;
   
+  if (!lsdb)
+    {
+      zlog_warn ("%s: Called with NULL lsdb!", __func__);
+      if (!lsa)
+        zlog_warn ("%s: and NULL LSA!", __func__);
+      else
+        zlog_warn ("LSA[Type%d:%s]: not associated with LSDB!",
+                   lsa->data->type, inet_ntoa (lsa->data->id));
+      return;
+    }
+  
   old = ospf_lsdb_lookup (lsdb, lsa);
 
   if (!old)
@@ -3014,8 +3025,14 @@
           }
 
 	/* Remove from lsdb. */
-        ospf_discard_from_db (ospf, lsa->lsdb, lsa);
-        ospf_lsdb_delete (lsa->lsdb, lsa);
+	if (lsa->lsdb)
+	  {
+	    ospf_discard_from_db (ospf, lsa->lsdb, lsa);
+	    ospf_lsdb_delete (lsa->lsdb, lsa);
+          }
+        else
+          zlog_warn ("%s: LSA[Type%d:%s]: No associated LSDB!", __func__,
+                     lsa->data->type, inet_ntoa (lsa->data->id));
       }
 
   /*    A MaxAge LSA must be removed immediately from the router's link
diff --git a/ospfd/ospf_lsdb.c b/ospfd/ospf_lsdb.c
index c0ec4b3..b161b80 100644
--- a/ospfd/ospf_lsdb.c
+++ b/ospfd/ospf_lsdb.c
@@ -127,6 +127,22 @@
   struct prefix_ls lp;
   struct route_node *rn;
 
+  if (!lsdb)
+    {
+      zlog_warn ("%s: Called with NULL LSDB", __func__);
+      if (lsa)
+        zlog_warn ("LSA[Type%d:%s]: LSA %p, lsa->lsdb %p",
+                   lsa->data->type, inet_ntoa (lsa->data->id),
+                   lsa, lsa->lsdb);
+      return;
+    }
+  
+  if (!lsa)
+    {
+      zlog_warn ("%s: Called with NULL LSA", __func__);
+      return;
+    }
+  
   table = lsdb->type[lsa->data->type].db;
   lsdb_prefix_set (&lp, lsa);
   rn = route_node_lookup (table, (struct prefix *) &lp);