linux-kernel - Re: [PATCH 4.4 057/101] net: sctp: fix array overrun read on sctp_timer

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Message-ID: <20170705121730.GD9714@kroah.com>
Date:   Wed, 5 Jul 2017 14:17:30 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Ben Hutchings <ben.hutchings@...ethink.co.uk>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Colin Ian King <colin.king@...onical.com>,
        Sasha Levin <alexander.levin@...izon.com>
Subject: Re: [PATCH 4.4 057/101] net: sctp: fix array overrun read on
 sctp_timer_tbl

On Tue, Jul 04, 2017 at 07:48:36PM +0100, Ben Hutchings wrote:
> On Mon, 2017-07-03 at 15:34 +0200, Greg Kroah-Hartman wrote:
> > 4.4-stable review patch.  If anyone has any objections, please let me know.
> > 
> > ------------------
> > 
> > From: Colin Ian King <colin.king@...onical.com>
> > 
> > 
> > [ Upstream commit 0e73fc9a56f22f2eec4d2b2910c649f7af67b74d ]
> > 
> > The comparison on the timeout can lead to an array overrun
> > read on sctp_timer_tbl because of an off-by-one error.
> [...]
> 
> The off-by-one error was only introduced in 4.11 by:
> 
> commit 7b9438de0cd4b46a6914416bfede6cf839cd9e68
> Author: Xin Long <lucien.xin@...il.com>
> Date:   Wed Jan 18 00:44:43 2017 +0800
> 
>     sctp: add stream reconf timer
> 
> So it is harmless but also useless to apply this to 4.4 and 4.9.

Thanks, I've now dropped it from both of those trees.

greg k-h