cgroup-util: fix memory leak on error

CID#1565824

Follow-up for f6793bbcf0

src/basic/cgroup-util.c

@@ -799,7 +799,7 @@ int cg_pid_get_path(const char *controller, pid_t pid, char **ret_path) {
                                 continue;
                 }
 
-                char *path = strdup(e + 1);
+                _cleanup_free_ char *path = strdup(e + 1);
                 if (!path)
                         return -ENOMEM;
 
@@ -812,7 +812,7 @@ int cg_pid_get_path(const char *controller, pid_t pid, char **ret_path) {
                 if (e)
                         *e = 0;
 
-                *ret_path = path;
+                *ret_path = TAKE_PTR(path);
                 return 0;
         }
 }

src/network/networkd-link.c

@@ -1443,6 +1443,7 @@ int link_reconfigure_impl(Link *link, LinkReconfigurationFlag flags) {
 }
 
 typedef struct LinkReconfigurationData {
+        Manager *manager;
         Link *link;
         LinkReconfigurationFlag flags;
         sd_bus_message *message;
@@ -1473,6 +1474,12 @@ static void link_reconfiguration_data_destroy_callback(LinkReconfigurationData *
                 }
 
                 if (!data->counter || *data->counter <= 0) {
+                        /* Update the state files before replying the bus method. Otherwise,
+                         * systemd-networkd-wait-online following networkctl reload/reconfigure may read an
+                         * outdated state file and wrongly handle an interface is already in the configured
+                         * state. */
+                        (void) manager_clean_all(data->manager);
+
                         r = sd_bus_reply_method_return(data->message, NULL);
                         if (r < 0)
                                 log_warning_errno(r, "Failed to reply for DBus method, ignoring: %m");
@@ -1521,6 +1528,7 @@ int link_reconfigure_full(Link *link, LinkReconfigurationFlag flags, sd_bus_mess
         }
 
         *data = (LinkReconfigurationData) {
+                .manager = link->manager,
                 .link = link_ref(link),
                 .flags = flags,
                 .message = sd_bus_message_ref(message), /* message may be NULL, but _ref() works fine. */

test/test-network/systemd-networkd-tests.py

@@ -6406,11 +6406,11 @@ class NetworkdRATests(unittest.TestCase, Utilities):
 
         for i in [100, 200, 300, 512, 1024, 2048]:
             if i not in [metric_1, metric_2]:
-                self.assertNotIn(f'{i}', output)
+                self.assertNotIn(f'metric {i} ', output)
 
         for i in ['low', 'medium', 'high']:
             if i not in [preference_1, preference_2]:
-                self.assertNotIn(f'{i}', output)
+                self.assertNotIn(f'pref {i}', output)
 
     def test_router_preference(self):
         copy_network_unit('25-veth-client.netdev',