Re: [PATCH v2] x86/mm: fix kern_addr_valid to cope with existing but not present entries

On Wed, Sep 08, 2021 at 12:35:21PM +0200, Borislav Petkov wrote:

So I did stare at this for a while, trying to make sense of it and David Hildenbrand asked for a Fixes: tag in v1 review and from doing a bit of git archeology I think it should be:

c40a56a7818c ("x86/mm/init: Remove freed kernel image areas from alias mapping")

because that thing added the clearing of the Present bit for the high kernel image mapping of those areas.

Right?

Hmm, but that commit is in v4.19. Mike has added

Cc: stable@vger.kernel.org # 4.4+

Mike, why 4.4 and newer?

Hmmm.