From: Eric Dumazet <eduma...@google.com>
Date: Mon, 14 Oct 2019 06:47:57 -0700
> syzbot found that if __inet_inherit_port() returns an error,
> we call tcp_done() after inet_csk_prepare_forced_close(),
> meaning the socket lock is no longer held.
>
> We might fix this in a different way in net-next, but
> for 5.4 it seems safer to relax the lockdep check.
>
> Fixes: d983ea6f16b8 ("tcp: add rcu protection around tp->fastopen_rsk")
> Signed-off-by: Eric Dumazet <eduma...@google.com>
> Reported-by: syzbot <syzkal...@googlegroups.com>
Applied.
