Re: [OPTIONAL/RFC v2 38/39] x86/cet/shstk: Add ARCH_CET_UNLOCK

Kees Cook
2022-10-04T00:00:54Z

On Thu, Sep 29, 2022 at 03:29:35PM -0700, Rick Edgecombe wrote:
> From: Mike Rapoport <rppt@linux.ibm.com>
>
> Userspace loaders may lock features before a CRIU restore operation has
> the chance to set them to whatever state is required by the process
> being restored. Allow a way for CRIU to unlock features. Add it as an
> arch_prctl() like the other CET operations, but restrict it being called
> by the ptrace arch_pctl() interface.

Hrm, please make this build-depend on CRIU...

--
Kees Cook