| Date | Thu, 19 Jan 2023 17:08:29 -0800 | From | Kees Cook <> | Subject | Re: [PATCH v5 39/39] x86/shstk: Add ARCH_SHSTK_STATUS |
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On Thu, Jan 19, 2023 at 01:23:17PM -0800, Rick Edgecombe wrote: > CRIU and GDB need to get the current shadow stack and WRSS enablement > status. This information is already available via /proc/pid/status, but > this is inconvenient for CRIU because it involves parsing the text output > in an area of the code where this is difficult. Provide a status > arch_prctl(), ARCH_SHSTK_STATUS for retrieving the status. Have arg2 be a > userspace address, and make the new arch_prctl simply copy the features > out to userspace. > > Tested-by: Pengfei Xu <pengfei.xu@intel.com> > Suggested-by: Mike Rapoport <rppt@kernel.org> > Signed-off-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
-- Kees Cook
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