netdev - RE: [PATCH net] sctp: hold the transport before using it in sctp_hash

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Message-ID: <063D6719AE5E284EB5DD2968C1650D6DB00F7710@AcuExch.aculab.com>
Date:   Thu, 8 Sep 2016 12:45:35 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Xin Long' <lucien.xin@...il.com>,
        network dev <netdev@...r.kernel.org>,
        "linux-sctp@...r.kernel.org" <linux-sctp@...r.kernel.org>
CC:     "davem@...emloft.net" <davem@...emloft.net>,
        Marcelo Ricardo Leitner <marcelo.leitner@...il.com>,
        Vlad Yasevich <vyasevich@...il.com>,
        "daniel@...earbox.net" <daniel@...earbox.net>
Subject: RE: [PATCH net] sctp: hold the transport before using it in
 sctp_hash_cmp

From: Xin Long
> Sent: 08 September 2016 10:49
> Now sctp uses the transport without holding it in sctp_hash_cmp,
> it can cause a use-after-free panic. As after it get transport from
> hashtable, another CPU may free it, then the members it accesses
> may be unavailable memory.

How old is this bug?
Is it in any release kernels?

	David