journal: rely on _cleanup_free_ to free a temporary string used in client_context_read_cgroup

Closes https://github.com/systemd/systemd/issues/11253.

(cherry picked from commit ef30f7cac18a810814ada7e6a68a31d48cc9fccd)
(cherry picked from commit 3513426adcecc322937635c11ebb89f174f849ed)

Resolves: #1767716

1 files changed, 2 insertions, 5 deletions

diff --git a/src/journal/journald-context.c b/src/journal/journald-context.c
index dba3525ed8..4f1278492f 100644
--- a/src/journal/journald-context.c
+++ b/src/journal/journald-context.c
@@ -276,7 +276,7 @@ static int client_context_read_label(
 }
 
 static int client_context_read_cgroup(Server *s, ClientContext *c, const char *unit_id) {
-        char *t = NULL;
+        _cleanup_free_ char *t = NULL;
         int r;
 
         assert(c);
@@ -284,7 +284,6 @@ static int client_context_read_cgroup(Server *s, ClientContext *c, const char *u
         /* Try to acquire the current cgroup path */
         r = cg_pid_get_path_shifted(c->pid, s->cgroup_root, &t);
         if (r < 0 || empty_or_root(t)) {
-
                 /* We use the unit ID passed in as fallback if we have nothing cached yet and cg_pid_get_path_shifted()
                  * failed or process is running in a root cgroup. Zombie processes are automatically migrated to root cgroup
                  * on cgroupsv1 and we want to be able to map log messages from them too. */
@@ -298,10 +297,8 @@ static int client_context_read_cgroup(Server *s, ClientContext *c, const char *u
         }
 
         /* Let's shortcut this if the cgroup path didn't change */
-        if (streq_ptr(c->cgroup, t)) {
-                free(t);
+        if (streq_ptr(c->cgroup, t))
                 return 0;
-        }
 
         free_and_replace(c->cgroup, t);