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Commit 8541b21e authored Jul 23, 2018 by Eric Dumazet Committed by David S. Miller Jul 23, 2018

tcp: call tcp_drop() from tcp_data_queue_ofo()



In order to be able to give better diagnostics and detect
malicious traffic, we need to have better sk->sk_drops tracking.

Fixes: 9f5afeae ("tcp: use an RB tree for ooo receive queue")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 3d4bf93a

net/ipv4/tcp_input.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -4510,7 +4510,7 @@ static void tcp_data_queue_ofo(struct sock sk, struct sk_buff skb)
		/* All the bits are present. Drop. */
		NET_INC_STATS(sock_net(sk),
		LINUX_MIB_TCPOFOMERGE);
		__kfree_skb(skb);
		tcp_drop(sk, skb);
		skb = NULL;
		tcp_dsack_set(sk, seq, end_seq);
		goto add_sack;
		@@ -4529,7 +4529,7 @@ static void tcp_data_queue_ofo(struct sock sk, struct sk_buff skb)
		TCP_SKB_CB(skb1)->end_seq);
		NET_INC_STATS(sock_net(sk),
		LINUX_MIB_TCPOFOMERGE);
		__kfree_skb(skb1);
		tcp_drop(sk, skb1);
		goto merge_right;
		}
		} else if (tcp_try_coalesce(sk, skb1,