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Commit 1fdf475a authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

tcp: tcp_disconnect() should clear window_clamp 



NFS can reuse its TCP socket after calling tcp_disconnect().

We noticed window scaling was not negotiated in SYN packet of next
connection request.

Fix is to clear tp->window_clamp in tcp_disconnect().

Reported-by: default avatarKrzysztof Oledzki <ole@ans.pl>
Tested-by: default avatarKrzysztof Oledzki <ole@ans.pl>
Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 0cae200e

net/ipv4/tcp.c

+1 −0
Original line number Diff line number Diff line
@@ -2059,6 +2059,7 @@ int tcp_disconnect(struct sock *sk, int flags) 
	tp->snd_ssthresh = TCP_INFINITE_SSTHRESH;

	tp->snd_cwnd_cnt = 0;

	tp->bytes_acked = 0;

	tp->window_clamp = 0;

	tcp_set_ca_state(sk, TCP_CA_Open);

	tcp_clear_retrans(tp);

	inet_csk_delack_init(sk);