1 files changed, 5 insertions, 2 deletions

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 48348dde6d81..87bb0258fd27 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -573,7 +573,6 @@ static struct inode *cgroup_new_inode(mode_t mode, struct super_block *sb)
                 inode->i_mode = mode;
                 inode->i_uid = current_fsuid();
                 inode->i_gid = current_fsgid();
-                inode->i_blocks = 0;
                 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
                 inode->i_mapping->backing_dev_info = &cgroup_backing_dev_info;
         }
@@ -2945,7 +2944,11 @@ int cgroup_clone(struct task_struct *tsk, struct cgroup_subsys *subsys,
         parent = task_cgroup(tsk, subsys->subsys_id);
 
         /* Pin the hierarchy */
-        atomic_inc(&parent->root->sb->s_active);
+        if (!atomic_inc_not_zero(&parent->root->sb->s_active)) {
+                /* We race with the final deactivate_super() */
+                mutex_unlock(&cgroup_mutex);
+                return 0;
+        }
 
         /* Keep the cgroup alive */
         get_css_set(cg);