tcp: temporarily disable Fast Open on SYN timeout

[cascardo/linux.git] / net / ipv4 / tcp_metrics.c

diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
index 4a2a841..2ab09cb 100644 (file)
--- a/net/ipv4/tcp_metrics.c
+++ b/net/ipv4/tcp_metrics.c
@@ -671,8 +671,9 @@ void tcp_fastopen_cache_set(struct sock *sk, u16 mss,
                struct tcp_fastopen_metrics *tfom = &tm->tcpm_fastopen;
 
                write_seqlock_bh(&fastopen_seqlock);
-               tfom->mss = mss;
-               if (cookie->len > 0)
+               if (mss)
+                       tfom->mss = mss;
+               if (cookie && cookie->len > 0)
                        tfom->cookie = *cookie;
                if (syn_lost) {
                        ++tfom->syn_loss;