From: Cong Wang <xiyou.wangc...@gmail.com>
Date: Sat, 24 Jun 2017 23:50:30 -0700
> We have to reset the sk->sk_rx_dst when we disconnect a TCP
> connection, because otherwise when we re-connect it this
> dst reference is simply overridden in tcp_finish_connect().
>
> This fixes a dst leak which leads to a loopback dev refcnt
> leak. It is a long-standing bug, Kevin reported a very similar
> (if not same) bug before. Thanks to Andrei for providing such
> a reliable reproducer which greatly narrows down the problem.
>
> Fixes: 41063e9dd119 ("ipv4: Early TCP socket demux.")
> Reported-by: Andrei Vagin <ava...@gmail.com>
> Reported-by: Kevin Xu <kaiwen...@hulu.com>
> Signed-off-by: Cong Wang <xiyou.wangc...@gmail.com>
Applied and queued up for -stable, thanks!
