diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index b11bd16..93823b8 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -1346,6 +1346,8 @@
 		}
 	}
 
+	tcp_verify_left_out(tp);
+
 	if ((reord < tp->fackets_out) && icsk->icsk_ca_state != TCP_CA_Loss &&
 	    (!tp->frto_highmark || after(tp->snd_una, tp->frto_highmark)))
 		tcp_update_reordering(sk, ((tp->fackets_out + 1) - reord), 0);
@@ -2121,6 +2123,8 @@
 {
 	struct tcp_sock *tp = tcp_sk(sk);
 
+	tcp_verify_left_out(tp);
+
 	if (tp->retrans_out == 0)
 		tp->retrans_stamp = 0;