Bug#1116358: linux-image-6.12.48+deb13-amd64: LVM snapshots causing I/O errors in KVM guest with aio=io_uring set

[Kevin Lumik <kevin@xf.ee>]

On Sat, 27 Sep 2025 16:09:08 +0200 Salvatore Bonaccorso
<carnil@debian.org> wrote:
> - Can you temporarily test as well the upper kernels from unstable
>   (6.16.8-1 right now, but soonish 6.16.9-1 as well) to see if the
>   problem is triggerable there as well?

I tested the upper kernels and was still able to reproduce the issue on
both 6.16.8-1 and 6.16.9-1.


> Note: If we find the problem is prosent in 6.16.y then we need to find
> the breaking change between 6.1.y and 6.12.y. It might be asier here
> if we first make the range of potential upstream versions more narrow,
> so you might first do a "manual bisect" on Debian revisions (For that
> use the snapshot.debian.org service to retrieve linux-images uploaded
> to Debian. E.g. go down from 6.12 in "major version" steps until we
> have close enough range of broken/fixed upstream major versions. Then
> perform a normal bisect between the upstream versions.

Using snapshot.debian.org I have determined that the breaking change was
introduced between 6.11.10 (tested 6.11.10-1) and 6.12 (tested 6.12.3-1
and 6.12~rc6-1~exp1).

Thank you for your assistance. Let me know what would be the next step.

--
Kevin