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Message-Id: <20190726152302.854207423@linuxfoundation.org>
Date: Fri, 26 Jul 2019 17:24:57 +0200
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>,
Christoph Paasch <cpaasch@...le.com>,
"David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.19 22/50] tcp: Reset bytes_acked and bytes_received when disconnecting
From: Christoph Paasch <cpaasch@...le.com>
[ Upstream commit e858faf556d4e14c750ba1e8852783c6f9520a0e ]
If an app is playing tricks to reuse a socket via tcp_disconnect(),
bytes_acked/received needs to be reset to 0. Otherwise tcp_info will
report the sum of the current and the old connection..
Cc: Eric Dumazet <edumazet@...gle.com>
Fixes: 0df48c26d841 ("tcp: add tcpi_bytes_acked to tcp_info")
Fixes: bdd1f9edacb5 ("tcp: add tcpi_bytes_received to tcp_info")
Signed-off-by: Christoph Paasch <cpaasch@...le.com>
Signed-off-by: Eric Dumazet <edumazet@...gle.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
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
@@ -2594,6 +2594,8 @@ int tcp_disconnect(struct sock *sk, int
tcp_saved_syn_free(tp);
tp->compressed_ack = 0;
tp->bytes_sent = 0;
+ tp->bytes_acked = 0;
+ tp->bytes_received = 0;
tp->bytes_retrans = 0;
tp->dsack_dups = 0;
tp->reord_seen = 0;
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