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Date:   Thu, 14 Mar 2019 22:41:57 +0800
From:   Jason Yan <>
To:     Greg KH <>
CC:     <>, Jann Horn <>,
        <>, "zhangyi (F)" <>,
        Zhaohongjiang <>,
        <>, <>
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:
>> 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
> .

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