NVMM + QEMU seem to make newish Linux kernels panic

Hi,

When booting a QEMU VM using NVMM on some recent Linux ISO images
(Alpine Linux, which uses Linux 6.18, and Ubuntu 26.04 beta,
which uses Linux 7.0rc), I get the following Linux kernel panic
inside both VMs:

Kernel panic - not syncing: Attempted to kill the idle task!

I don't have that problem when not using NVMM, although the VM is
obviously horribly slow.  I don't have that problem either with
older Linux kernels (6.12 is fine).

I'm using NetBSD/amd64 11.0_RC3 with qemu-10.2.2 from pkgsrc.

Does anybody else have the same problem?