On Thu, Feb 07, 2019 at 11:50:52AM +0000, Linus Torvalds wrote: > If you re-generate the canonical address in __cpa_addr(), now we'll > actually have the real virtual address around for a lot of code-paths > (pte lookup etc), which was what people wanted to avoid in the first > place.
Note that it's an 'unsigned long' address, not an actual pointer, and (afaict) non of the code paths use it as a pointer. This _should_ avoid the CPU from following said pointer and doing a deref on it. But yes, I didn't go all the way down, maybe I missed some.
