| Date | Tue, 26 Jul 2022 12:21:40 +0200 | From | Borislav Petkov <> | Subject | Re: [PATCHv7 10/14] x86/mm: Avoid load_unaligned_zeropad() stepping into unaccepted memory |
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On Tue, Jun 14, 2022 at 03:02:27PM +0300, Kirill A. Shutemov wrote: > But, this approach does not work for unaccepted memory. For TDX, a load > from unaccepted memory will not lead to a recoverable exception within > the guest. The guest will exit to the VMM where the only recourse is to > terminate the guest.
FTR, this random-memory-access-to-unaccepted-memory-is-deadly thing is really silly. We should be able to handle such cases - because they do happen often - in a more resilient way. Just look at the complex dance this patch needs to do just to avoid this.
IOW, this part of the coco technology needs improvement.
Just sayin...
-- Regards/Gruss, Boris.
https://people.kernel.org/tglx/notes-about-netiquette
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