On Tue, 21 Jul 2026 00:55:33 +0000 Link Lin <[email protected]> wrote:
> During PM freeze (e.g. S3 suspend or S4 hibernation), device drivers like
> virtio_balloon reset their underlying virtio devices and delete their
> virtqueues via vdev->config->del_vqs().
>
> ...
>
> Fix this by switching page reporting work to system_freezable_wq.
>
> ...
>
Thanks.
> Fixes: 924a663f75e2 ("virtio-balloon: Reporting free page reservations")
hm, now where did that come from. I can find no such commit and that's
the second time this very unusual thing has happened in 30 minutes! I
wonder what's going on.
I'll use
36e66c554b5c ("mm: introduce Reported pages")
OK?
> Cc: [email protected]
The bug is very old so I won't fast-track this fix into 7.2-rcX.
AI review pointed at a possible pre-existing use-after-free issue,
related to virtio-balloon. But I think this is a rephrasing of the
issue it flagged against your v2 patch.
https://sashiko.dev/#/patchset/[email protected]
