static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
					 struct nlattr *rp)
{
	struct xfrm_replay_state_esn *up;
	int ulen;

	if (!replay_esn || !rp)
		return 0;

 	up = nla_data(rp);
 	ulen = xfrm_replay_state_esn_len(up);
 
	if (nla_len(rp) < ulen || xfrm_replay_state_esn_len(replay_esn) != ulen)
 		return -EINVAL;
 
 	if (up->replay_window > up->bmp_len * sizeof(__u32) * 8)
		return -EINVAL;

	return 0;
}

Unknown