netdev - Re: [PATCH net] sctp: ensure ep is not destroyed before doing the dump

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Message-Id: <20170619.151416.320922975636462627.davem@davemloft.net>
Date:   Mon, 19 Jun 2017 15:14:16 -0400 (EDT)
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: ensure ep is not destroyed before doing the
 dump

From: Xin Long <lucien.xin@...il.com>
Date: Sat, 17 Jun 2017 16:10:27 +0800

> Now before dumping a sock in sctp_diag, it only holds the sock while
> the ep may be already destroyed. It can cause a use-after-free panic
> when accessing ep->asocs.
> 
> This patch is to set sctp_sk(sk)->ep NULL in sctp_endpoint_destroy,
> and check if this ep is already destroyed before dumping this ep.
> 
> Suggested-by: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
> Signed-off-by: Xin Long <lucien.xin@...il.com>

Applied, thanks.