diff options
| author | Simon Baatz <gmbnomis@gmail.com> | 2026-03-09 11:02:28 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-03-14 18:01:50 +0300 |
| commit | e2b9c52a2b00ca754def5597cbc07ad401457974 (patch) | |
| tree | fd2b2d7ecb4124d8725fbc947807915f2893fe92 | |
| parent | 81714374a29cbaca7e23d9229296515027e355cb (diff) | |
| download | linux-e2b9c52a2b00ca754def5597cbc07ad401457974.tar.xz | |
tcp: increase LINUX_MIB_BEYOND_WINDOW for SKB_DROP_REASON_TCP_OVERWINDOW
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 <gmbnomis@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20260309-tcp_rfc7323_retract_wnd_rfc-v3-3-4c7f96b1ec69@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | net/ipv4/tcp_input.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 2e1b23760815..e6b2f4be7723 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -5678,6 +5678,7 @@ drop: 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; } |