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Re: [Xen-devel] [PATCH 1/2] x86: consider effective protection attributes in W+X check

>>> On 12.12.17 at 11:36, <mingo@xxxxxxxxxx> wrote:

> * Jan Beulich <JBeulich@xxxxxxxx> wrote:
>> Using just the leaf page table entry flags would cause a false warning
>> in case _PAGE_RW is clear or _PAGE_NX is set in a higher level entry.
> Good find - I assume this bug can cause both false positives and false 
> negatives 
> as well, right?

Yes, albeit I'm not aware of any outside of Xen (with that other patch


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