netdev - Re: [PATCH net] net/smc: do not schedule tx_work in SMC

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Message-Id: <20190805.132403.543467679705520777.davem@davemloft.net>
Date:   Mon, 05 Aug 2019 13:24:03 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     kgraul@...ux.ibm.com
Cc:     netdev@...r.kernel.org, linux-s390@...r.kernel.org,
        gor@...ux.ibm.com, heiko.carstens@...ibm.com, raspl@...ux.ibm.com,
        ubraun@...ux.ibm.com
Subject: Re: [PATCH net] net/smc: do not schedule tx_work in SMC_CLOSED
 state

From: Karsten Graul <kgraul@...ux.ibm.com>
Date: Fri,  2 Aug 2019 10:16:38 +0200

> From: Ursula Braun <ubraun@...ux.ibm.com>
> 
> The setsockopts options TCP_NODELAY and TCP_CORK may schedule the
> tx worker. Make sure the socket is not yet moved into SMC_CLOSED
> state (for instance by a shutdown SHUT_RDWR call).
> 
> Reported-by: syzbot+92209502e7aab127c75f@...kaller.appspotmail.com
> Reported-by: syzbot+b972214bb803a343f4fe@...kaller.appspotmail.com
> Fixes: 01d2f7e2cdd31 ("net/smc: sockopts TCP_NODELAY and TCP_CORK")
> Signed-off-by: Ursula Braun <ubraun@...ux.ibm.com>
> Signed-off-by: Karsten Graul <kgraul@...ux.ibm.com>

Applied and queued up for -stable.