lkml.org 
[lkml]   [2022]   [May]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH] mm/page_table_check: fix accessing unmapped ptep
From
Date
On 2022/5/27 2:31, Pasha Tatashin wrote:
>>> Miaohe, please store the ptep, or maybe drop this patch entirely.
>>
>> I think it's best to fix it. I rewrote the changelog as
>>
>> : ptep is unmapped too early, so ptep could theoretically be accessed while
>> : it's unmapped. This might become a problem if/when CONFIG_HIGHPTE becomes
>> : available on riscv.
>> :
>> : Fix it by deferring pte_unmap() until page table checking is done.
>>
>> I'll retain the Fixes:. This doesn't imply cc:stable in MM, and anyone
>> who backports the original patchset will want to know about this fixup.
> Makes sense.
>
>
>> And I queued a fixup for the thing Matthew noticed.
> Thank you Andrew.
>

Many thanks for all of your comments, review and fixup! :)

> Pasha
> .
>

\
 
 \ /
  Last update: 2022-05-27 03:11    [W:0.036 / U:0.272 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site