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Subject: Re: Consultation on backport 97e3d26b5e5f("x86/mm: Randomize per-cpu
 entry area") to stable
To:     Greg KH <gregkh@linuxfoundation.org>
CC:     <peterz@infradead.org>, <keescook@chromium.org>,
        <sethjenkins@google.com>,
        Dave Hansen <dave.hansen@linux.intel.com>, <bp@suse.de>,
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 <Y/RzDvXr/iGpHl+f@kroah.com>
From:   Tong Tiangen <tongtiangen@huawei.com>
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在 2023/2/21 15:30, Greg KH 写道:
> On Tue, Feb 21, 2023 at 03:19:05PM +0800, Tong Tiangen wrote:
>> Hi peter:
>>
>> Do you have any plans to backport this patch[1] to the stable branch of the
>> lower version, such as 4.19.y ?
> 
> Why?  That is a new feature for 6.2 why would it be needed to fix
> anything in really old kernels?

Hi Greg:

This patch fix CVE-2023-0597[1], this CVE report a flaw possibility of 
memory leak. And this is important for some products using this stable 
version.

[1] https://bugzilla.redhat.com/show_bug.cgi?id=2165926

> 
>> When I try to backport this patch to 5.10.y, I met some KASAN[2] and
>> KASLR[3] related issues. Although they were finally solved, there were still
>> some detours in the process.
> 
> Send your series of backports to the list for review please if they
> match the stable kernel rules.

OK.

> 
> But why can't you just use the 6.2 kernel instead of something obsolete
> like 4.19?
> 
> thanks,
> 
> greg k-h
> .

Thanks.
Tong
.