diff -up ypserv-2.19/lib/yp_db.c.memleak ypserv-2.19/lib/yp_db.c
--- ypserv-2.19/lib/yp_db.c.memleak	2004-04-14 13:47:02.000000000 +0200
+++ ypserv-2.19/lib/yp_db.c	2008-09-25 13:10:10.000000000 +0200
@@ -200,6 +200,7 @@ ypdb_close_all (void)
 			 fast_open_files[i].map, i);
 	      free (fast_open_files[i].domain);
 	      free (fast_open_files[i].map);
+		  fast_open_files[i].domain = fast_open_files[i].map = NULL;
 	      _db_close (fast_open_files[i].dbp);
 	      fast_open_files[i].dbp = NULL;
 	      fast_open_files[i].flag = 0;
@@ -232,8 +233,11 @@ ypdb_close (DB_FILE file)
 			log_msg ("ypdb_MUST_close (%s/%s|%d)",
 				 fast_open_files[i].domain,
 				 fast_open_files[i].map, i);
-		      free (fast_open_files[i].domain);
-		      free (fast_open_files[i].map);
+			  if (fast_open_files[i].domain != NULL)
+				  free (fast_open_files[i].domain);
+			  if (fast_open_files[i].map != NULL)
+				  free (fast_open_files[i].map);
+			  fast_open_files[i].domain = fast_open_files[i].map = NULL;
 		      _db_close (fast_open_files[i].dbp);
 		      fast_open_files[i].dbp = NULL;
 		      fast_open_files[i].flag = 0;
@@ -279,6 +283,10 @@ ypdb_open (const char *domain, const cha
 	  fast_open_init = 0;
 	  for (i = 0; i < cached_filehandles; i++)
 	    {
+		  if (fast_open_files[i].domain != NULL)
+			  free (fast_open_files[i].domain);
+		  if (fast_open_files[i].map != NULL)
+			  free (fast_open_files[i].map);
 	      fast_open_files[i].domain =
 		fast_open_files[i].map = NULL;
 	      fast_open_files[i].dbp = (DB_FILE) NULL;
@@ -334,7 +342,11 @@ ypdb_open (const char *domain, const cha
 	      Fopen tmp;
 
 	      if ((fast_open_files[i].dbp = _db_open (domain, map)) == NULL)
-		return NULL;
+			return NULL;
+	      if (fast_open_files[i].domain != NULL)
+		  	free(fast_open_files[i].domain);
+	      if (fast_open_files[i].map != NULL)
+			free(fast_open_files[i].map);
 	      fast_open_files[i].domain = strdup (domain);
 	      fast_open_files[i].map = strdup (map);
 	      fast_open_files[i].flag |= F_OPEN_FLAG;
@@ -375,8 +387,10 @@ ypdb_open (const char *domain, const cha
 			 fast_open_files[i].map, i);
 		log_msg ("Opening: %s/%s (%d)", domain, map, i);
 	      }
-	    free (fast_open_files[i].domain);
-	    free (fast_open_files[i].map);
+		if (fast_open_files[i].domain != NULL)
+			free (fast_open_files[i].domain);
+	    if (fast_open_files[i].map != NULL)
+			free (fast_open_files[i].map);
 	    _db_close (fast_open_files[i].dbp);
 
 	    fast_open_files[i].domain = strdup (domain);