lkml.org 
[lkml]   [2020]   [Mar]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [RFC PATCH v9 18/27] x86/cet/shstk: Introduce WRUSS instruction
From
Date
On Tue, 2020-02-25 at 13:10 -0800, Kees Cook wrote:
> On Wed, Feb 05, 2020 at 10:19:26AM -0800, Yu-cheng Yu wrote:
> > WRUSS is a new kernel-mode instruction but writes directly to user Shadow
> > Stack (SHSTK) memory. This is used to construct a return address on SHSTK
> > for the signal handler.
> >
> > This instruction can fault if the user SHSTK is not valid SHSTK memory.
> > In that case, the kernel does a fixup.
>
> Since these functions aren't used in this patch, should this get merged
> with patch 19?

Yes, I can do that.

Yu-cheng

\
 
 \ /
  Last update: 2020-03-05 19:40    [W:0.097 / U:2.408 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site