Commit e858faf5 authored Jul 06, 2019 by Christoph Paasch Committed by David S. Miller Jul 08, 2019

tcp: Reset bytes_acked and bytes_received when disconnecting



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: 0df48c26 ("tcp: add tcpi_bytes_acked to tcp_info")
Fixes: bdd1f9ed ("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>

parent cecaa76b

net/ipv4/tcp.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -2614,6 +2614,8 @@ int tcp_disconnect(struct sock *sk, int flags)
		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->duplicate_sack[0].start_seq = 0;
		tp->duplicate_sack[0].end_seq = 0;