netfilter: ipset: list:set: make sure all elements are checked by the gc

When an element timed out, the next one was skipped by the garbage
collector, fixed.
Signed-off-by: NJozsef Kadlecsik <kadlec@blackhole.kfki.hu>

net/netfilter/ipset/ip_set_list_set.c

@@ -218,13 +218,16 @@ set_cleanup_entries(struct ip_set *set)
 {
 	struct list_set *map = set->data;
 	struct set_elem *e;
-	u32 i;
+	u32 i = 0;
 
-	for (i = 0; i < map->size; i++) {
+	while (i < map->size) {
 		e = list_set_elem(set, map, i);
 		if (e->id != IPSET_INVALID_ID &&
 		    ip_set_timeout_expired(ext_timeout(e, set)))
 			list_set_del(set, i);
+			/* Check element moved to position i in next loop */
+		else
+			i++;
 	}
 }