Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:38066 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965679AbdKPRuk (ORCPT ); Thu, 16 Nov 2017 12:50:40 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Eric Dumazet , "David S. Miller" Subject: [PATCH 4.13 29/44] tcp: refresh tp timestamp before tcp_mtu_probe() Date: Thu, 16 Nov 2017 18:42:53 +0100 Message-Id: <20171116172824.931257401@linuxfoundation.org> In-Reply-To: <20171116172823.336649076@linuxfoundation.org> References: <20171116172823.336649076@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 4.13-stable review patch. If anyone has any objections, please let me know. ------------------ From: Eric Dumazet [ Upstream commit ee1836aec4f5a977c1699a311db4d9027ef21ac8 ] In the unlikely event tcp_mtu_probe() is sending a packet, we want tp->tcp_mstamp being as accurate as possible. This means we need to call tcp_mstamp_refresh() a bit earlier in tcp_write_xmit(). Fixes: 385e20706fac ("tcp: use tp->tcp_mstamp in output path") Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/ipv4/tcp_output.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -2271,6 +2271,7 @@ static bool tcp_write_xmit(struct sock * sent_pkts = 0; + tcp_mstamp_refresh(tp); if (!push_one) { /* Do MTU probing. */ result = tcp_mtu_probe(sk); @@ -2282,7 +2283,6 @@ static bool tcp_write_xmit(struct sock * } max_segs = tcp_tso_segs(sk, mss_now); - tcp_mstamp_refresh(tp); while ((skb = tcp_send_head(sk))) { unsigned int limit;