linux-kernel - [PATCH 4.9 013/116] tcp: clear tp->data_segs{in|out} in tcp

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Message-Id: <20200213151847.863022869@linuxfoundation.org>
Date:   Thu, 13 Feb 2020 07:19:17 -0800
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Eric Dumazet <edumazet@...gle.com>,
        Martin KaFai Lau <kafai@...com>,
        Yuchung Cheng <ycheng@...gle.com>,
        Neal Cardwell <ncardwell@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH 4.9 013/116] tcp: clear tp->data_segs{in|out} in tcp_disconnect()

From: Eric Dumazet <edumazet@...gle.com>

[ Upstream commit db7ffee6f3eb3683cdcaeddecc0a630a14546fe3 ]

tp->data_segs_in and tp->data_segs_out need to be cleared
in tcp_disconnect().

tcp_disconnect() is rarely used, but it is worth fixing it.

Fixes: a44d6eacdaf5 ("tcp: Add RFC4898 tcpEStatsPerfDataSegsOut/In")
Signed-off-by: Eric Dumazet <edumazet@...gle.com>
Cc: Martin KaFai Lau <kafai@...com>
Cc: Yuchung Cheng <ycheng@...gle.com>
Cc: Neal Cardwell <ncardwell@...gle.com>
Acked-by: Neal Cardwell <ncardwell@...gle.com>
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 net/ipv4/tcp.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2316,6 +2316,8 @@ int tcp_disconnect(struct sock *sk, int
 	tcp_saved_syn_free(tp);
 	tp->bytes_acked = 0;
 	tp->bytes_received = 0;
+	tp->data_segs_in = 0;
+	tp->data_segs_out = 0;
 
 	WARN_ON(inet->inet_num && !icsk->icsk_bind_hash);