network: fix use after free()

The hashmap will be accessed by client_stop().

diff --git a/src/network/networkd-manager.c b/src/network/networkd-manager.c
index 51cc8f654bb20ce4eb4828122bad1eab3a5dc1c1..6037e8564fd65b8971f505f5a34c8b1db010cb08 100644 (file)
--- a/src/network/networkd-manager.c
+++ b/src/network/networkd-manager.c
@@ -1395,7 +1395,7 @@ void manager_free(Manager *m) {
 
         while ((a = hashmap_first_key(m->dhcp6_prefixes)))
                 (void) dhcp6_prefix_remove(m, a);
-        hashmap_free(m->dhcp6_prefixes);
+        m->dhcp6_prefixes = hashmap_free(m->dhcp6_prefixes);
 
         while ((link = hashmap_steal_first(m->links))) {
                 if (link->dhcp6_client)