[  95.2110291] fatal page fault in supervisor mode
[  95.2242980] trap type 6 code 0 rip 0xffffffff80fe92cc cs 0x8 rflags 0x10287 cr2 0xffff900000000000 ilevel 0 rsp 0xffffb9816eb07c88
[  95.2393385] curlwp 0xffffb98011f41680 pid 4185.2 lowest kstack 0xffffb9816eb002c0
[  95.2476256] panic: trap
[  95.2476256] cpu0: Begin traceback...
[  95.2555810] vpanic() at netbsd:vpanic+0x214
[  95.2555810] snprintf() at netbsd:snprintf
23:36:59 executing program 4:
r0 = open$dir(&(0x7f00000003c0)='.\x00', 0x0, 0x0)
mkdir(&(0x7f0000000000)='./file0\x00', 0x0)
readlink(&(0x7f0000000080)='./file1\x00', &(0x7f00000000c0)=""/161, 0xa1)
faccessat(r0, &(0x7f0000000040)='./file0\x00', 0x2, 0x100)

[  95.2671853] startlwp() at netbsd:startlwp
[  95.2782142] alltraps() at netbsd:alltraps+0xb2
[  95.2890002] shm_delete_mapping() at netbsd:shm_delete_mapping+0x7f
[  95.3001421] sys_shmat() at netbsd:sys_shmat+0x4cd
[  95.3001421] sys___syscall() at netbsd:sys___syscall+0xe2
[  95.3136814] syscall() at netbsd:syscall+0x348
[  95.3235213] --- syscall (number 198) ---
[  95.3235213] 731f9903f4aa:
[  95.3358110] cpu0: End traceback...

[  95.3358110] dumping to dev 4,1 (offset=0, size=0): not possible
[  95.3358110] rebooting...
SeaBIOS (version 1.8.2-20190308_060531-google)
Total RAM Size = 0x00000001e0000000 = 7680 MiB
CPUs found: 2     Max CPUs supported: 2
found virtio-scsi at 0:3
virtio-scsi vendor='Google' product='PersistentDisk' rev='1' type=0 removable=0
virtio-scsi blksize=512 sectors=4194304 = 2048 MiB
drive 0x000f29d0: PCHS=0/0/0 translation=lba LCHS=520/128/63 s=4194304
Booting from Hard Disk 0...

>> NetBSD/x86 BIOS Boot, Revision 5.10 (Tue Jul 17 14:59:51 UTC 2018) (from NetBSD 8.0)
>> Memory: 639/3144640 k

     1. Boot normally
     2. Boot single user
     3. Disable ACPI
     4. Disable ACPI and SMP
     5. Drop to boot prompt