From 4b726e81dab2cefefd2c1cb00e3074ac0eec4b15 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Wed, 26 Apr 2017 21:10:55 -0700 Subject: [PATCH] tcp: tcp_rack_reo_timeout() must update tp->tcp_mstamp I wrongly assumed tp->tcp_mstamp was up to date at the time tcp_rack_reo_timeout() was called. It is not true, since we only update tcp->tcp_mstamp when receiving a packet (as initially done in commit 69e996c58a35 ("tcp: add tp->tcp_mstamp field") tcp_rack_reo_timeout() being called by a timer and not an incoming packet, we need to refresh tp->tcp_mstamp Fixes: 7c1c7308592f ("tcp: do not pass timestamp to tcp_rack_detect_loss()") Signed-off-by: Eric Dumazet Cc: Soheil Hassas Yeganeh Cc: Neal Cardwell Cc: Yuchung Cheng Acked-by: Soheil Hassas Yeganeh Acked-by: Neal Cardwell Signed-off-by: David S. Miller --- net/ipv4/tcp_recovery.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/ipv4/tcp_recovery.c b/net/ipv4/tcp_recovery.c index cd72b3d3879e..362b8c75bfab 100644 --- a/net/ipv4/tcp_recovery.c +++ b/net/ipv4/tcp_recovery.c @@ -166,6 +166,7 @@ void tcp_rack_reo_timeout(struct sock *sk) u32 timeout, prior_inflight; prior_inflight = tcp_packets_in_flight(tp); + skb_mstamp_get(&tp->tcp_mstamp); tcp_rack_detect_loss(sk, &timeout); if (prior_inflight != tcp_packets_in_flight(tp)) { if (inet_csk(sk)->icsk_ca_state != TCP_CA_Recovery) {