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The tcp_chr_free_connection & tcp_chr_disconnect methods both skip all of their cleanup work unless the 's->connected' flag is set. This flag is set when the incoming client connection is ready to use. Crucially this is *after* the TLS handshake has been completed. So if the TLS handshake fails and we try to cleanup the failed client, all the cleanup is skipped as 's->connected' is still false. The only important thing that should be skipped in this case is sending of the CHR_EVENT_CLOSED, because we never got as far as sending the corresponding CHR_EVENT_OPENED. Every other bit of cleanup can be robust against being called even when s->connected is false. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-Id: <20171005155057.7664-1-berrange@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>