1 files changed, 1 insertions, 0 deletions

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index fb1193bec4af..402f7aab8b2d 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -4618,6 +4618,7 @@ int __init_or_module cgroup_load_subsys(struct cgroup_subsys *ss)
         if (IS_ERR(css)) {
                 /* failure case - need to deassign the cgroup_subsys[] slot. */
                 cgroup_subsys[ss->subsys_id] = NULL;
+                mutex_unlock(&cgroup_root_mutex);
                 mutex_unlock(&cgroup_mutex);
                 return PTR_ERR(css);
         }