Re: [PATCH v24 13/30] mm: Introduce VM_SHADOW_STACK for shadow stack memory

[Kirill A. Shutemov]

On Thu, Apr 01, 2021 at 03:10:47PM -0700, Yu-cheng Yu wrote:
> A shadow stack PTE must be read-only and have _PAGE_DIRTY set.  However,
> read-only and Dirty PTEs also exist for copy-on-write (COW) pages.  These
> two cases are handled differently for page faults.  Introduce
> VM_SHADOW_STACK to track shadow stack VMAs.
> 
> Signed-off-by: Yu-cheng Yu <yu-cheng.yu@xxxxxxxxx>
> Cc: Kees Cook <keescook@xxxxxxxxxxxx>

Reviewed-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>

-- 
 Kirill A. Shutemov