1 files changed, 3 insertions, 0 deletions

diff --git a/net/ipv4/tcp_veno.c b/net/ipv4/tcp_veno.c
index 9edb340f2f95..ec854cc5fad5 100644
--- a/net/ipv4/tcp_veno.c
+++ b/net/ipv4/tcp_veno.c
@@ -74,6 +74,9 @@ static void tcp_veno_pkts_acked(struct sock *sk, u32 cnt, ktime_t last)
         struct veno *veno = inet_csk_ca(sk);
         u32 vrtt;
 
+        if (ktime_equal(last, net_invalid_timestamp()))
+                return;
+
         /* Never allow zero rtt or baseRTT */
         vrtt = ktime_to_us(net_timedelta(last)) + 1;