Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull vfs umount_tree() leak fix from Al Viro:
 "Fix braino introduced in 'switch the remnants of releasing the
  mountpoint away from fs_pin'.

  The most visible result is leaking struct mount when mounting btrfs,
  making it impossible to shut down"

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  fix the struct mount leak in umount_tree()

fs/namespace.c

@@ -1463,7 +1463,6 @@ static void umount_tree(struct mount *mnt, enum umount_tree_flags how)
 			p->mnt.mnt_flags |= MNT_SYNC_UMOUNT;
 
 		disconnect = disconnect_mount(p, how);
-
 		if (mnt_has_parent(p)) {
 			mnt_add_count(p->mnt_parent, -1);
 			if (!disconnect) {
@@ -1471,10 +1470,11 @@ static void umount_tree(struct mount *mnt, enum umount_tree_flags how)
 				list_add_tail(&p->mnt_child, &p->mnt_parent->mnt_mounts);
 			} else {
 				umount_mnt(p);
-				hlist_add_head(&p->mnt_umount, &unmounted);
 			}
 		}
 		change_mnt_propagation(p, MS_PRIVATE);
+		if (disconnect)
+			hlist_add_head(&p->mnt_umount, &unmounted);
 	}
 }