virtio panic during reboot (NetBSD 9)

[Thomas Klausner <tk%giga.or.at@localhost>]

Hi!

With a NetBSD 9 release in a virtual server (not sure what technology,
dmesg available on request), I saw a panic during reboot:

netbsd: [ 425.9816243] uvm_fault(0xffffceeb5b6b2a20, 0x0, 1) -> e
netbsd: [ 425.9816243] fatal page fault in supervisor mode
netbsd: [ 425.9816243] trap type 6 code 0 rip 0xffffffff80240fb0 cs 0x8 rflags 0x10246 cr2 0x41 ilevel 0 rsp 0xffffda80b0
2fed70
netbsd: [ 425.9816243] curlwp 0xffffceeb58a62080 pid 72.1 lowest kstack 0xffffda80b02fc2c0
netbsd: [ 425.9816243] Skipping crash dump on recursive panic
netbsd: [ 425.9816243] panic: trap
netbsd: [ 425.9893443] cpu0: Begin traceback...
netbsd: [ 425.9893443] vpanic() at netbsd:vpanic+0x160
netbsd: [ 425.9893443] snprintf() at netbsd:snprintf
netbsd: [ 425.9893443] startlwp() at netbsd:startlwp
netbsd: [ 425.9893443] alltraps() at netbsd:alltraps+0xbb
netbsd: [ 425.9992299] virtio_pci_free_interrupts() at netbsd:virtio_pci_free_interrupts+0x3c
netbsd: [ 426.0220926] virtio_child_detach() at netbsd:virtio_child_detach+0x61
netbsd: [ 426.0220926] vioscsi_detach() at netbsd:vioscsi_detach+0x9d
netbsd: [ 426.0292585] config_detach() at netbsd:config_detach+0x85
netbsd: [ 426.0292585] config_detach_all() at netbsd:config_detach_all+0x9f
netbsd: [ 426.0292585] cpu_reboot() at netbsd:cpu_reboot+0x137
netbsd: [ 426.0292585] sys_reboot() at netbsd:sys_reboot+0x75
netbsd: [ 426.0292585] syscall() at netbsd:syscall+0x157
netbsd: [ 426.0392749] --- syscall (number 208) ---
netbsd: [ 426.0392749] 7af270242f5a:
netbsd: [ 426.0392749] cpu0: End traceback...
netbsd: [ 426.0392749] rebooting...

Is this a known problem or should I file a bug report?
 Thomas