| From | Andy Lutomirski <> | Date | Mon, 9 Nov 2020 09:28:01 -0800 | Subject | Re: [RFC][PATCH 13/24] x86/pti: Extend PTI user mappings |
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On Mon, Nov 9, 2020 at 3:22 AM Alexandre Chartre <alexandre.chartre@oracle.com> wrote: > > Extend PTI user mappings so that more kernel entry code can be executed > with the user page-table. To do so, we need to map syscall and interrupt > entry code,
Probably fine.
> per cpu offsets (__per_cpu_offset, which is used some in > entry code),
This likely already leaks due to vulnerable CPUs leaking address space layout info.
> the stack canary,
That's going to be a very tough sell.
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