Merge remote-tracking branch 'origin/jogo_cnetlink_clone' into basebo…

…xd_next

src/netlink/cnetlink.cc

@@ -956,8 +956,17 @@ void cnetlink::nl_cb_v2(struct nl_cache *cache, struct nl_object *old_obj,
  auto nl = static_cast<cnetlink *>(data);
 
  // only enqueue nl msgs if not in stopped state
- if (nl->state != NL_STATE_STOPPED)
- nl->nl_objs.emplace_back(action, old_obj, new_obj);
+ if (nl->state != NL_STATE_STOPPED) {
+ // If libnl updated the object instead of replacing it, old_obj will be a
+ // clone of the old object, and new_obj is the updated old object. Since
+ // later notifications may update the new_obj further, clone
+ // it to keep it in the state of the notification.
+ auto local_new = nl_object_clone(new_obj);
+
+ nl->nl_objs.emplace_back(action, old_obj, local_new);
+
+ nl_object_put(local_new);
+ }
 }
 
 void cnetlink::set_tapmanager(std::shared_ptr<port_manager> pm) {