netdev - Re: 979d63d50c0c0f7bc537bf821e056cc9fe5abd38 bpf: prevent out of bounds speculation on pointer arithmetic

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Message-ID: <4cff80ab-7f29-8ef4-1d95-a2c0d4c4b9b8@huawei.com>
Date:   Thu, 14 Mar 2019 22:41:57 +0800
From:   Jason Yan <yanaijie@...wei.com>
To:     Greg KH <gregkh@...uxfoundation.org>
CC:     <daniel@...earbox.net>, Jann Horn <jannh@...gle.com>,
        <ast@...nel.org>, "zhangyi (F)" <yi.zhang@...wei.com>,
        Zhaohongjiang <zhaohongjiang@...wei.com>,
        <netdev@...r.kernel.org>, <stable@...r.kernel.org>
Subject: Re: 979d63d50c0c0f7bc537bf821e056cc9fe5abd38 bpf: prevent out of
 bounds speculation on pointer arithmetic



On 2019/3/13 0:22, Greg KH wrote:
> On Tue, Mar 12, 2019 at 10:58:39PM +0800, Jason Yan wrote:
>>
>>
>> On 2019/3/12 19:52, Greg KH wrote:
>>> On Mon, Mar 11, 2019 at 05:18:33PM +0800, Jason Yan wrote:
>>>> Hi, Daniel & Greg
>>>>
>>>> This patch (979d63d50c0c bpf: prevent out of bounds speculation on pointer
>>>> arithmetic) was assigned a CVE (CVE-2019-7308) with a high score:
>>>>
>>>> CVSS v3.0 Severity and Metrics:
>>>> Base Score: 9.8 CRITICAL
>>>>
>>>> And this patch is not in stable-4.4, would you please backport this patch to
>>>> 4.4?
>>>
>>> For a bit more context, it's also not in 4.14.y, 4.9.y, or 4.4.y.  I
>>> found a backported series for 4.4.y in the SLES kernel tree that I could
>>> try to import here if it really is a big deal.
>>>
>>
>> I'm sorry that I did not find them. I only know the SLES  kernel tree at:
>> https://github.com/openSUSE/kernel.
>> Is there another place for the SLES kernel tree?
> 
> That's the tree you want, look at the SLES branches.  I see the patches
> backported to the SLE12-SP4 branch already, so that is hopefully a
> working set of patches for 4.4.y.
> 

I checked the SLE12-SP4 branch and the kernel version is 4.12. There is
still a lot of conflicts even with 4.14.y. So it's hard to backport to
4.4.y. I will try to solve the conflicts with 4.14.y but I'm not sure if
I can solve all the conflicts and finish this job.

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