Re: [PATCH v2 24/39] x86/cet/shstk: Add user-mode shadow stack support

Kees Cook
2022-10-20T22:55:04Z

On Thu, Oct 20, 2022 at 09:29:38PM +0000, Edgecombe, Rick P wrote:
> The code used to use shstk->base and shstk->size to keep track of if
> shadow stack was enabled. I'm not sure why to zero it now. Just
> defensively or did you see a concrete issue?

Just to be defensive. It's not fast path by any means, to better to
have values that make a bit of sense there. *shrug* It just stood out
as feeling "missing" while I was reading the code.

--
Kees Cook