On Fri, 2024-06-21 at 07:51 -0700, Dave Hansen wrote: > > But, still, what if you take a Dirty=1,Write=1 pud and pud_modify() it > to make it Dirty=1,Write=0? What prevents that from being > misinterpreted by the hardware as being a valid 1G shadow stack mapping? Hmm, it looks like we could use an arch_check_zapped_pud() that does a warning like arch_check_zapped_pte/pmd() too. Not that we had no use for one before this.
