Re: Minor PKRU bug?

[Dave Hansen]

On 07/09/2016 02:27 PM, Andy Lutomirski wrote:
> is_prefetch in arch/x86/mm/fault.c can be called on a user address
> that's not readable due to PKRU.  This could break it.  You might need
> to add a get_user_exec or similar.

Thanks for the heads-up.  I think I'll just need a version that does
something along the lines of stac/clac, but with PKRU.

I think I can do it with an "_exec" variant of probe_kernel_address(),
but it's a bit messy.