diff options
-rw-r--r-- | tcp.c | 8 |
1 files changed, 8 insertions, 0 deletions
@@ -1425,6 +1425,14 @@ static void tcp_get_tap_ws(struct tcp_tap_conn *conn, static void tcp_tap_window_update(struct tcp_tap_conn *conn, unsigned wnd) { wnd = MIN(MAX_WINDOW, wnd << conn->ws_from_tap); + + /* Work-around for bug introduced in peer kernel code, commit + * e2142825c120 ("net: tcp: send zero-window ACK when no memory"). + * We don't update if window shrank to zero. + */ + if (!wnd && SEQ_LT(conn->seq_ack_from_tap, conn->seq_to_tap)) + return; + conn->wnd_from_tap = MIN(wnd >> conn->ws_from_tap, USHRT_MAX); /* FIXME: reflect the tap-side receiver's window back to the sock-side |