SKB_DROP_REASON_SOCKET_CLOSE
kfree_skb_reason(skb, SKB_DROP_REASON_SOCKET_CLOSE);
kfree_skb_reason(skb, SKB_DROP_REASON_SOCKET_CLOSE);
skb_queue_purge_reason(&sk->sk_receive_queue, SKB_DROP_REASON_SOCKET_CLOSE);
kfree_skb_reason(skb, SKB_DROP_REASON_SOCKET_CLOSE);
__skb_queue_purge_reason(&hitlist, SKB_DROP_REASON_SOCKET_CLOSE);