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tcp: Reset bytes_acked and bytes_received when disconnecting

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[ 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@google.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@apple.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Christoph Paasch 2019-07-06 16:13:07 -07:00 committed by Greg Kroah-Hartman
parent adcac7370d
commit cdb26083bd
1 changed files with 2 additions and 0 deletions
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2
net/ipv4/tcp.c
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@ -2366,6 +2366,8 @@ int tcp_disconnect(struct sock *sk, int flags)
dst_release(sk->sk_rx_dst);
sk->sk_rx_dst = NULL;
tcp_saved_syn_free(tp);
tp->bytes_acked = 0;
tp->bytes_received = 0;
/* Clean up fastopen related fields */
tcp_free_fastopen_req(tp);