netdev - Re: [PATCH net] sctp: reinit stream if stream outcnt has been change by sinit in sendmsg

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Message-Id: <20180116.142057.1449511465809553791.davem@davemloft.net>
Date:   Tue, 16 Jan 2018 14:20:57 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     lucien.xin@...il.com
Cc:     netdev@...r.kernel.org, linux-sctp@...r.kernel.org,
        marcelo.leitner@...il.com, nhorman@...driver.com
Subject: Re: [PATCH net] sctp: reinit stream if stream outcnt has been
 change by sinit in sendmsg

From: Xin Long <lucien.xin@...il.com>
Date: Mon, 15 Jan 2018 17:01:19 +0800

> After introducing sctp_stream structure, sctp uses stream->outcnt as the
> out stream nums instead of c.sinit_num_ostreams.
> 
> However when users use sinit in cmsg, it only updates c.sinit_num_ostreams
> in sctp_sendmsg. At that moment, stream->outcnt is still using previous
> value. If it's value is not updated, the sinit_num_ostreams of sinit could
> not really work.
> 
> This patch is to fix it by updating stream->outcnt and reiniting stream
> if stream outcnt has been change by sinit in sendmsg.
> 
> Fixes: a83863174a61 ("sctp: prepare asoc stream for stream reconf")
> Signed-off-by: Xin Long <lucien.xin@...il.com>

Applied and queued up for -stable.