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: e16163b6 ("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>
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