Index: sys/ddb/db_sym.c
===================================================================
--- sys/ddb/db_sym.c
+++ sys/ddb/db_sym.c
@@ -371,8 +371,15 @@
 	unsigned int	diff;
 	size_t		newdiff;
 	int		i;
-	c_db_sym_t	ret = C_DB_SYM_NULL, sym;
+	c_db_sym_t	ret, sym;
 
+	/* Prevent pollution from bogus symbols. */
+	if (val < PAGE_SIZE) {
+		*offp = 0;
+		return (C_DB_SYM_NULL);
+	}
+
+	ret = C_DB_SYM_NULL;
 	newdiff = diff = val;
 	for (i = 0; i < db_nsymtab; i++) {
 	    sym = X_db_search_symbol(&db_symtabs[i], val, strategy, &newdiff);