Re: [PATCH v2 0/3] mm: khugepaged: fix tracepoint UAF

[Vernon Yang]

On Mon, Aug 17, 2026 at 03:30:49PM -0700, Andrew Morton wrote:
> On Sun, 16 Aug 2026 02:16:32 +0800 Lance Yang <lance.yang@xxxxxxxxx> wrote:
>
> > >>Pass the pfn to the tracepoints directly, captured while the folio is
> > >>still pinned, closing the use-after-free windows in
> > >>mm_khugepaged_scan_file(), mm_khugepaged_scan_pmd() and
> > >>mm_khugepaged_collapse_file().
> > >
> > >Well spotted!
> > >
> > >Gave the series a run on x86_64 (KVM), all good (only classic SPARSEMEM
> > >untested) :)
> >
> > Hmm ... stumbled over something else while testing this ...
>
> Sashiko might have found a couple of pre-existing things.
> 	https://sashiko.dev/#/patchset/20260815051924.194810-1-vernon2gm@xxxxxxxxx
>
> Vernon, you may decide that the second one is on-topic for this patchset?

Hi, Andrew, the second one already is on-topic for this patchset, detail
look for the PATCH#3 please.

--
Cheers,
Vernon