netdev - Re: [PATCH net] sctp: avoid BUG_ON on sctp_wait_for

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Message-Id: <20170207.125554.925905416124561370.davem@davemloft.net>
Date:   Tue, 07 Feb 2017 12:55:54 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     marcelo.leitner@...il.com
Cc:     netdev@...r.kernel.org, linux-sctp@...r.kernel.org,
        vyasevich@...il.com, nhorman@...driver.com, alex.popov@...ux.com
Subject: Re: [PATCH net] sctp: avoid BUG_ON on sctp_wait_for_sndbuf

From: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
Date: Mon,  6 Feb 2017 18:10:31 -0200

> Alexander Popov reported that an application may trigger a BUG_ON in
> sctp_wait_for_sndbuf if the socket tx buffer is full, a thread is
> waiting on it to queue more data and meanwhile another thread peels off
> the association being used by the first thread.
> 
> This patch replaces the BUG_ON call with a proper error handling. It
> will return -EPIPE to the original sendmsg call, similarly to what would
> have been done if the association wasn't found in the first place.
> 
> Acked-by: Alexander Popov <alex.popov@...ux.com>
> Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
> ---
> Please consider this to -stable. Thanks

Applied and queued up for -stable, thanks a lot.