# Re: \[PATCH v19 20/25\] x86/cet/shstk: User-mode shadow stack support

- From: Kees Cook \<hidden\>
- Date: 2021-02-04 20:32:47 
- List: linux-arch
- Page: https://ratatoskr.run/linux-arch/2021/02/6259151
- Thread: https://ratatoskr.run/linux-doc/2021/02/6257763/t.md

```text
On Wed, Feb 03, 2021 at 02:55:42PM -0800, Yu-cheng Yu wrote:
> Introduce basic shadow stack enabling/disabling/allocation routines.
> A task's shadow stack is allocated from memory with VM_SHSTK flag and has
> a fixed size of min(RLIMIT_STACK, 4GB).
> 
> Signed-off-by: Yu-cheng Yu <redacted>

Reviewed-by: Kees Cook <redacted>

-- 
Kees Cook
```