lkml.org 
[lkml]   [2018]   [Jul]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCHv5 02/19] mm: Do not use zero page in encrypted pages
From
Date
On 07/17/2018 04:20 AM, Kirill A. Shutemov wrote:
> Zero page is not encrypted and putting it into encrypted VMA produces
> garbage.
>
> We can map zero page with KeyID-0 into an encrypted VMA, but this would
> be violation security boundary between encryption domains.

Why? How is it a violation?

It only matters if they write secrets. They can't write secrets to the
zero page.

Is this only because you accidentally inherited ->vm_page_prot on the
zero page PTE?

\
 
 \ /
  Last update: 2018-07-18 19:37    [W:0.227 / U:3.316 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site