From: Eric Dumazet <eric.duma...@gmail.com>
Date: Wed, 02 Aug 2017 23:10:46 -0700
> From: Eric Dumazet <eduma...@google.com>
>
> syzkaller was able to trigger a divide by 0 in TCP stack [1]
>
> Issue here is that keepalive timer needs to be updated to not attempt
> to send a probe if the connection setup was deferred using
> TCP_FASTOPEN_CONNECT socket option added in linux-4.11
...
> Fixes: 19f6d3f3c842 ("net/tcp-fastopen: Add new API support")
> Signed-off-by: Eric Dumazet <eduma...@google.com>
> Reported-by: Dmitry Vyukov <dvyu...@google.com>
Applied and queued up for -stable, thanks!
