static int do_move_mount(struct path *path, const char *old_name)
{
	struct path old_path, parent_path;
	struct mount *p;
	struct mount *old;
	int err;
	if (!old_name || !*old_name)
		return -EINVAL;
	err = kern_path(old_name, LOOKUP_FOLLOW, &old_path);
	if (err)
		return err;

	err = lock_mount(path);
	if (err < 0)
		goto out;

	old = real_mount(old_path.mnt);
	p = real_mount(path->mnt);

	err = -EINVAL;
	if (!check_mnt(p) || !check_mnt(old))
		goto out1;

	if (d_unlinked(path->dentry))
		goto out1;

	err = -EINVAL;
	if (old_path.dentry != old_path.mnt->mnt_root)
		goto out1;

	if (!mnt_has_parent(old))
		goto out1;

	if (S_ISDIR(path->dentry->d_inode->i_mode) !=
	      S_ISDIR(old_path.dentry->d_inode->i_mode))
		goto out1;
	/*
	 * Don't move a mount residing in a shared parent.
	 */
	if (IS_MNT_SHARED(old->mnt_parent))
		goto out1;
	/*
	 * Don't move a mount tree containing unbindable mounts to a destination
	 * mount which is shared.
	 */
	if (IS_MNT_SHARED(p) && tree_contains_unbindable(old))
		goto out1;
	err = -ELOOP;
	for (; mnt_has_parent(p); p = p->mnt_parent)
		if (p == old)
			goto out1;

	err = attach_recursive_mnt(old, path, &parent_path);
	if (err)
		goto out1;

	/* if the mount is moved, it should no longer be expire
	 * automatically */
	list_del_init(&old->mnt_expire);
out1:
	unlock_mount(path);
out:
	if (!err)
		path_put(&parent_path);
	path_put(&old_path);
	return err;
}

This category addresses vulnerabilities caused by flawed access control mechanisms, where incorrect permission settings allow unauthorized users to access restricted resources.