1 files changed, 2 insertions, 0 deletions

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 3e0d19631534..5b6690d05abb 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -295,7 +295,9 @@ static u16 tcp_select_window(struct sock *sk)
         /* RFC1323 scaling applied */
         new_win >>= tp->rx_opt.rcv_wscale;
 
+        /* If we advertise zero window, disable fast path. */
         if (new_win == 0) {
+                tp->pred_flags = 0;
                 if (old_win)
                         NET_INC_STATS(sock_net(sk),
                                       LINUX_MIB_TCPTOZEROWINDOWADV);