cgroup: fix missing unlock in cgroup_release_agent()
The patch 971ff4935538: "cgroup: use a per-cgroup work for release
agent" from Sep 18, 2014, leads to the following static checker
warning:
kernel/cgroup.c:5310 cgroup_release_agent()
warn: 'mutex:&cgroup_mutex' is sometimes locked here and sometimes unlocked.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Zefan Li <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 16e3a4f..f873c46 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -5291,7 +5291,10 @@
mutex_unlock(&cgroup_mutex);
call_usermodehelper(argv[0], argv, envp, UMH_WAIT_EXEC);
+ goto out_free;
out:
+ mutex_unlock(&cgroup_mutex);
+out_free:
kfree(agentbuf);
kfree(pathbuf);
}