netdev - Re: [PATCH stable 4.4 05/11] ip: use rb trees for IP frag queue.

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Date:   Fri, 25 Jan 2019 16:12:28 +0800
From:   maowenan <maowenan@...wei.com>
To:     Greg KH <gregkh@...ux-foundation.org>
CC:     <netdev@...r.kernel.org>, <eric.dumazet@...il.com>,
        <davem@...emloft.net>, <stable@...r.kernel.org>,
        <edumazet@...gle.com>
Subject: Re: [PATCH stable 4.4 05/11] ip: use rb trees for IP frag queue.



On 2019/1/25 15:07, Greg KH wrote:
> On Fri, Jan 25, 2019 at 09:50:35AM +0800, maowenan wrote:
>>
>>
>> On 2019/1/25 1:58, Greg KH wrote:
>>> On Wed, Jan 23, 2019 at 10:19:40AM +0800, Mao Wenan wrote:
>>>> From: Peter Oskolkov <posk@...gle.com>
>>>>
>>>> [ Upstream commit fa0f527358bd900ef92f925878ed6bfbd51305cc ]
>>>
>>> This commit is not in the 4.14.y tree, any specific reason why not?
>>
>> I found the commit 6b921536f1707a240e6f53843f1f26231016fda5 net: sk_buff rbnode reorg  in v4.14.y
>> including the fixes.
> 
> Yes, that commit is really bffa72cf7f9d ("net: sk_buff rbnode reorg"),
> which is upstream in 4.14.15 and 4.15.  But fa0f527358bd ("ip: use rb
> trees for IP frag queue.") is not in 4.14 at all, it showed up in
> 4.9.134 and 4.19.  Why did the 4.14 tree not need it and 4.9 and 4.4
> does?

The commit 6b921536f170(net: sk_buff rbnode reorg) in 4.14 combined two commits in
mainline(bffa72cf7f9d net: sk_buff rbnode reorg. and fa0f527358bd ip: use rb trees for IP frag queue.).
The main fix patch for CVE-2018-5391 is fa0f527358bd(ip: use rb trees for IP frag queue), I don't think
it is necessary to backport bffa72cf7f9d to 4.14, but the fa0f527358bd is really needed.


mainline patches
commit bffa72cf7f9df842f0016ba03586039296b4caaf
Author: Eric Dumazet <edumazet@...gle.com>
Date:   Tue Sep 19 05:14:24 2017 -0700

    net: sk_buff rbnode reorg

commit fa0f527358bd900ef92f925878ed6bfbd51305cc
Author: Peter Oskolkov <posk@...gle.com>
Date:   Thu Aug 2 23:34:39 2018 +0000

    ip: use rb trees for IP frag queue.

linux-4.14.y
commit 6b921536f1707a240e6f53843f1f26231016fda5
Author: Eric Dumazet <edumazet@...gle.com>
Date:   Thu Sep 13 07:58:58 2018 -0700

    net: sk_buff rbnode reorg


> 
> thanks,
> 
> greg k-h
> 
>