lkml.org 
[lkml]   [2019]   [Nov]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v4 10/17] arm64: disable kretprobes with SCS
On Mon, Nov 04, 2019 at 03:42:09PM -0800, Sami Tolvanen wrote:
> On Mon, Nov 4, 2019 at 9:05 AM Mark Rutland <mark.rutland@arm.com> wrote:
> > I'm a bit confused as to why that's the case -- could you please
> > elaborate on how this is incompatible?
> >
> > IIUC kretrobes works by patching the function entry point with a BRK, so
> > that it can modify the LR _before_ it is saved to the stack. I don't see
> > how SCS affects that.
>
> You're correct. While this may not be optimal for reducing attack
> surface, I just tested this to confirm that there's no functional
> conflict. I'll drop this and related patches from v5.

Great; thanks for confirming!

Mark.

\
 
 \ /
  Last update: 2019-11-05 21:50    [W:0.247 / U:35.584 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site