Re: [PATCH] mm: fix NULL pointer dereference in wp_page_reuse()

[Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>]

On Tue, Jul 26, 2022 at 12:45 AM David Hildenbrand <david@xxxxxxxxxx> wrote:
>
> >       VM_BUG_ON(!(vmf->flags & FAULT_FLAG_WRITE));
> > -     VM_BUG_ON(PageAnon(page) && !PageAnonExclusive(page));
> > +     VM_BUG_ON(page && PageAnon(page) && !PageAnonExclusive(page));
>
> Indeed, fortunately, only an issue in the VM_BUG_ON statement

Well, at least Fedora ends up enabling CONFIG_DEBUG_VM by default, so
normal people - not just VM people - can definitely see this.

> Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>

Applied.

                    Linus