From: Eric Dumazet <eric.duma...@gmail.com>
Date: Wed, 16 Mar 2016 22:52:15 -0700
> From: Eric Dumazet <eduma...@google.com>
>
> Now SYN_RECV request sockets are installed in ehash table, an ICMP
> handler can find a request socket while another cpu handles an incoming
> packet transforming this SYN_RECV request socket into an ESTABLISHED
> socket.
>
> We need to remove the now obsolete WARN_ON(req->sk), since req->sk
> is set when a new child is created and added into listener accept queue.
>
> If this race happens, the ICMP will do nothing special.
>
> Fixes: 079096f103fa ("tcp/dccp: install syn_recv requests into ehash table")
> Signed-off-by: Eric Dumazet <eduma...@google.com>
> Reported-by: Ben Lazarus <blaza...@google.com>
> Reported-by: Neal Cardwell <ncardw...@google.com>
Applied and queued up for -stable, thanks Eric.
