Re: [PATCH v3 6/8] mm/x86: arch_check_zapped_pud()

[David Hildenbrand]

On 15.07.24 21:21, Peter Xu wrote:
> Introduce arch_check_zapped_pud() to sanity check shadow stack on PUD zaps.
> It has the same logic of the PMD helper.
>
> One thing to mention is, it might be a good idea to use page_table_check in
> the future for trapping wrong setups of shadow stack pgtable entries [1].
> That is left for the future as a separate effort.
>
> [1] https://lore.kernel.org/all/59d518698f664e07c036a5098833d7b56b953305.camel@xxxxxxxxx
>
> Cc: "Edgecombe, Rick P" <rick.p.edgecombe@xxxxxxxxx>
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: Borislav Petkov <bp@xxxxxxxxx>
> Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
> Cc: x86@xxxxxxxxxx
> Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
> ---

Acked-by: David Hildenbrand <david@xxxxxxxxxx>

--
Cheers,

David / dhildenb