From: Karsten Graul <kgraul@xxxxxxxxxxxxx>
Date: Fri, 2 Aug 2019 10:47:50 +0200
> From: Ursula Braun <ubraun@xxxxxxxxxxxxx>
>
> FASTOPEN is not possible with SMC. sendmsg() with msg_flag MSG_FASTOPEN
> triggers a fallback to TCP if the socket is in state SMC_INIT.
> But if a nonblocking connect is already started, fallback to TCP
> is no longer possible, even though the socket may still be in state
> SMC_INIT.
> And if a nonblocking connect is already started, a listen() call
> does not make sense.
>
> Reported-by: syzbot+bd8cc73d665590a1fcad@xxxxxxxxxxxxxxxxxxxxxxxxx
> Fixes: 50717a37db032 ("net/smc: nonblocking connect rework")
> Signed-off-by: Ursula Braun <ubraun@xxxxxxxxxxxxx>
> Signed-off-by: Karsten Graul <kgraul@xxxxxxxxxxxxx>
Applied and queued up for -stable.
