cgroup: fix alloc_cgroup_ns() error handling in copy_cgroup_ns()
alloc_cgroup_ns() returns an ERR_PTR value on error but
copy_cgroup_ns() was checking for NULL for error. Fix it.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index afb1205..d92d91a 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -6083,10 +6083,11 @@
spin_unlock_bh(&css_set_lock);
mutex_unlock(&cgroup_mutex);
- err = -ENOMEM;
new_ns = alloc_cgroup_ns();
- if (!new_ns)
+ if (IS_ERR(new_ns)) {
+ err = PTR_ERR(new_ns);
goto err_out;
+ }
new_ns->user_ns = get_user_ns(user_ns);
new_ns->root_cset = cset;