Re: [PATCH v1] mm/gup: fix FOLL_FORCE COW security issue and remove FOLL_COW

[Linus Torvalds]

On Tue, Aug 9, 2022 at 1:14 PM Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
>
> But as there are two bits, I'm sure somebody ends up touching one and
> not the other.

Ugh. The nommu code certainly does odd things here. That just looks wrong.

And the hugetlb code does something horrible too, but never *sets* it,
so it looks like some odd subset of VM_SHARED.

                 Linus