tcp: Fix queue traversal in tcp_use_frto().



We must check tcp_skb_is_last() before doing a tcp_write_queue_next().

Signed-off-by: David S. Miller <davem@davemloft.net>

parent 77d40a09

net/ipv4/tcp_input.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1746,6 +1746,8 @@ int tcp_use_frto(struct sock *sk)
		return 0;

		skb = tcp_write_queue_head(sk);
		if (tcp_skb_is_last(sk, skb))
		return 1;
		skb = tcp_write_queue_next(sk, skb); /* Skips head */
		tcp_for_write_queue_from(skb, sk) {
		if (skb == tcp_send_head(sk))