Re: [PATCH v7 0/6] x86/fpu: Allow PKRU to be (once again) written by ptrace

[Dave Hansen]

On 11/15/22 15:09, Kyle Huey wrote:
> Following last week's discussion I've reorganized this patch. The goal
> remains to restore the pre-5.14 behavior of ptrace(PTRACE_SET_REGSET,
> NT_X86_XSTATE) for the PKRU register (which was equivalent to a hardware
> XRSTOR instruction).

The new version looks great.  I've applied it.

I did remove the stable@ tags for now.  There were a couple reasons for
that.  First, most of the x86 stuff marked for stable@ goes via our
tip/urgent branch and this doesn't seem super urgent.  It also touches
code that's exposed in at least three separate UABIs, so I want a bit
more soak time than x86/urgent normally provides.

I have zero objections if anyone wants to submit it to stable@ after it
hits Linus's tree.