On Tue, Jul 14, 2026 at 11:05 AM Link Lin <[email protected]> wrote: > > Per the earlier feedback to keep these fixes independent, I'll format > v2 as a 3-part patch series: > [PATCH v2 1/3] mm/page_reporting: use system_freezable_wq > [PATCH v2 2/3] virtio_balloon: fix shrinker UAF during PM freeze > [PATCH v2 3/3] virtio_balloon: fix OOM notifier UAF during PM freeze > > I'll send that out shortly.
Hi everyone, I have just sent out the v2 patch series in a new thread: https://lore.kernel.org/all/[email protected]/ Just a quick update: I previously mentioned I would include a fix for the OOM notifier as part 3. However, upon further audit, the PM core explicitly disables the OOM killer (via oom_killer_disable()) during freeze_processes() before device drivers are frozen. Therefore, the virtio_balloon_oom_notify callback cannot trigger while the virtqueues are deleted. Since it is already safe, I dropped it from the series. v2 now consists solely of the page reporting workqueue migration and the shrinker TOCTOU fix. Thanks again for the reviews! Best, Link
