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| author | Paolo Abeni <pabeni@redhat.com> | 2021-02-19 18:35:37 +0100 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2021-02-22 18:54:58 -0800 |
| commit | 341c65242fe18aac8900e4291d472df9f7ba7bc7 (patch) | |
| tree | e606c01acb1027e8c3b9be6ed37acc4546d5ee7b /net | |
| parent | 94ead4caa0615f4b0719ffcb4dbd0907fe2f9265 (diff) | |
| download | linux-341c65242fe18aac8900e4291d472df9f7ba7bc7.tar.gz linux-341c65242fe18aac8900e4291d472df9f7ba7bc7.tar.bz2 linux-341c65242fe18aac8900e4291d472df9f7ba7bc7.zip | |
mptcp: fix DATA_FIN processing for orphaned sockets
Currently we move orphaned msk sockets directly from FIN_WAIT2
state to CLOSE, with the rationale that incoming additional
data could be just dropped by the TCP stack/TW sockets.
Anyhow we miss sending MPTCP-level ack on incoming DATA_FIN,
and that may hang the peers.
Fixes: e16163b6e2b7 ("mptcp: refactor shutdown and close")
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/mptcp/protocol.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index a57f3eab7b6a..b1075fc3d3b3 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -2264,13 +2264,12 @@ static void mptcp_worker(struct work_struct *work) __mptcp_check_send_data_fin(sk); mptcp_check_data_fin(sk); - /* if the msk data is completely acked, or the socket timedout, - * there is no point in keeping around an orphaned sk + /* There is no point in keeping around an orphaned sk timedout or + * closed, but we need the msk around to reply to incoming DATA_FIN, + * even if it is orphaned and in FIN_WAIT2 state */ if (sock_flag(sk, SOCK_DEAD) && - (mptcp_check_close_timeout(sk) || - (state != sk->sk_state && - ((1 << inet_sk_state_load(sk)) & (TCPF_CLOSE | TCPF_FIN_WAIT2))))) { + (mptcp_check_close_timeout(sk) || sk->sk_state == TCP_CLOSE)) { inet_sk_state_store(sk, TCP_CLOSE); __mptcp_destroy_sock(sk); goto unlock; |