From: Simon Baatz <[email protected]> Since commit 9ca48d616ed7 ("tcp: do not accept packets beyond window"), the path leading to SKB_DROP_REASON_TCP_OVERWINDOW in tcp_data_queue() is probably dead. However, it can be reached now when tcp_max_receive_window() is larger than tcp_receive_window(). In that case, increment LINUX_MIB_BEYOND_WINDOW as done in tcp_sequence().
Signed-off-by: Simon Baatz <[email protected]> --- net/ipv4/tcp_input.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 2e1b237608150c2e9c9baf73cf047ed0823ca555..e6b2f4be7723db14acf2ae528df17b6d106b9da9 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -5678,6 +5678,7 @@ static void tcp_data_queue(struct sock *sk, struct sk_buff *skb) if (!before(TCP_SKB_CB(skb)->seq, tp->rcv_nxt + tcp_receive_window(tp))) { reason = SKB_DROP_REASON_TCP_OVERWINDOW; + NET_INC_STATS(sock_net(sk), LINUX_MIB_BEYOND_WINDOW); goto out_of_window; } -- 2.53.0
