On 2/7/25 12:16, Bernd Schubert wrote: > > > On 2/7/25 11:55, Vlastimil Babka wrote: >> On 2/7/25 11:43, Miklos Szeredi wrote: >>> On Fri, 7 Feb 2025 at 11:25, Vlastimil Babka <vbabka@xxxxxxx> wrote: >>> >>>> Could be a use-after free of the page, which sets PG_lru again. The list >>>> corruptions in __rmqueue_pcplist also suggest some page manipulation after >>>> free. The -1 refcount suggests somebody was using the page while it was >>>> freed due to refcount dropping to 0 and then did a put_page()? >>> >>> Can you suggest any debug options that could help pinpoint the offender? >> >> CONFIG_DEBUG_VM enables a check in put_page_testzero() that would catch the >> underflow (modulo a tiny race window where it wouldn't). Worth trying. > > I typically run all of my tests with these options enabled > > https://github.com/bsbernd/tiny-qemu-virtio-kernel-config > > > If Christian or Mantas could tell me what I need to install and run, I > could probably quickly give it a try. Got firefox through flatpak working with 6.13 + patches, but the flatpak fuse mount is basically empty and I didn't observe any issue. Would be great if you could post, what exactly triggers it. Thanks, Bernd
