1 files changed, 8 insertions, 4 deletions

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index a28e4db8a952..ad70a962c20e 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -3504,6 +3504,11 @@ static bool tcp_process_frto(struct sock *sk, int flag)
                 }
         } else {
                 if (!(flag & FLAG_DATA_ACKED) && (tp->frto_counter == 1)) {
+                        if (!tcp_packets_in_flight(tp)) {
+                                tcp_enter_frto_loss(sk, 2, flag);
+                                return true;
+                        }
+
                         /* Prevent sending of new data. */
                         tp->snd_cwnd = min(tp->snd_cwnd,
                                            tcp_packets_in_flight(tp));
@@ -5543,7 +5548,7 @@ slow_path:
         if (len < (th->doff << 2) || tcp_checksum_complete_user(sk, skb))
                 goto csum_error;
 
-        if (!th->ack)
+        if (!th->ack && !th->rst)
                 goto discard;
 
         /*
@@ -5649,8 +5654,7 @@ static bool tcp_rcv_fastopen_synack(struct sock *sk, struct sk_buff *synack,
          * the remote receives only the retransmitted (regular) SYNs: either
          * the original SYN-data or the corresponding SYN-ACK is lost.
          */
-        syn_drop = (cookie->len <= 0 && data &&
-                    inet_csk(sk)->icsk_retransmits);
+        syn_drop = (cookie->len <= 0 && data && tp->total_retrans);
 
         tcp_fastopen_cache_set(sk, mss, cookie, syn_drop);
 
@@ -5988,7 +5992,7 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
                         goto discard;
         }
 
-        if (!th->ack)
+        if (!th->ack && !th->rst)
                 goto discard;
 
         if (!tcp_validate_incoming(sk, skb, th, 0))