[PATCH] arm: __pmd_free_tlb(): call page table desctructor (Was: BUG: Bad page state in process true pfn:a8fed on arm)

[Mike Rapoport]

On Tue, Aug 25, 2020 at 10:53:22AM +0200, Anders Roxell wrote:
> On Tue, 25 Aug 2020 at 10:32, Mike Rapoport <rppt@xxxxxxxxxxxxx> wrote:
> >
> > On Tue, Aug 25, 2020 at 01:03:53PM +0530, Naresh Kamboju wrote:
> > > On Mon, 24 Aug 2020 at 16:36, Matthew Wilcox <willy@xxxxxxxxxxxxx> wrote:
> > > >
> > > > On Mon, Aug 24, 2020 at 03:14:55PM +0530, Naresh Kamboju wrote:
> > > > > [   67.545247] BUG: Bad page state in process true  pfn:a8fed
> > > > > [   67.550767] page:9640c0ab refcount:0 mapcount:-1024
> > > >
> > > > Somebody freed a page table without calling __ClearPageTable() on it.
> > >
> > > After running git bisect on this problem,
> > > The first suspecting of this problem on arm architecture this patch.
> > > 424efe723f7717430bec7c93b4d28bba73e31cf6
> > > ("mm: account PMD tables like PTE tables ")
> > >
> > > Reported-by: Naresh Kamboju <naresh.kamboju@xxxxxxxxxx>
> > > Reported-by: Anders Roxell <anders.roxell@xxxxxxxxxx>
> >
> > Can you please check if this fix helps?
> 
> That fixed the problem.

Since this is still in -mm tree, I've omitted commit sha and Fixes.

Andrew, is it possible to add this as a fixup to for the original
commit?