Re: [PATCH 00/37 v6] PTI support for x86-32

[Linus Torvalds]

On Mon, Apr 23, 2018 at 8:47 AM, Joerg Roedel <joro@xxxxxxxxxx> wrote:
>
> here is the new version of my PTI patches for x86-32 which
> implement last weeks review comments.

Just one question: have you checked the page table setup for the
basics wrt the USER bit in particular?

No global pages should be marked PAGE_USER, with the possible
exception of that nasty old vsyscall page.

And it would be nice to verify that the page tables for kernel
mappings also don't have PAGE_USER on them, although again that
vsyscall page can cause problems.

                  Linus