Re: [RFC PATCH v2 6/6] x86/entry/pti: don't switch PGD on when pti_disable is set
From: Dave Hansen
Date: Thu Jan 11 2018 - 13:38:14 EST
On 01/11/2018 10:32 AM, Josh Poimboeuf wrote:
>> hmm. Exposing cr3 to user space will make it trivial for user process
>> to know whether kpti is active. Not sure how exploitable such
>> information leak.
> It's already trivial to detect PTI from user space.
Do tell.