Re: [PATCH v2 29/39] x86/cet/shstk: Support wrss for userspace

On Thu, Sep 29, 2022 at 03:29:26PM -0700, Rick Edgecombe wrote:

For the current shadow stack implementation, shadow stacks contents easily
be arbitrarily provisioned with data.

I can't parse this sentence.

This property helps apps protect
themselves better, but also restricts any potential apps that may want to
do exotic things at the expense of a little security.

Is anything using this right now? Wouldn't thing be safer without WRSS?
(Why can't we skip this patch?)

-- 
Kees Cook