| Date | Fri, 2 Dec 2022 18:33:27 -0800 | From | Kees Cook <> | Subject | Re: [PATCH v4 13/39] x86/mm: Start actually marking _PAGE_COW |
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On Fri, Dec 02, 2022 at 04:35:40PM -0800, Rick Edgecombe wrote: > The recently introduced _PAGE_COW should be used instead of the HW Dirty > bit whenever a PTE is Write=0, in order to not inadvertently create > shadow stack PTEs. Update pte_mk*() helpers to do this, and apply the same > changes to pmd and pud. > > Tested-by: Pengfei Xu <pengfei.xu@intel.com> > Tested-by: John Allen <john.allen@amd.com> > Co-developed-by: Yu-cheng Yu <yu-cheng.yu@intel.com> > Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
-- Kees Cook
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