panic: vrele: ref cnt
Starting stack trace...
panic(ffffffff8341912f) at panic+0x1d0 sys/kern/subr_prf.c:229
vrele(fffffd806c766dd8) at vrele+0x240 sys/kern/vfs_subr.c:823
fdfree(ffff8000363bcfb8) at fdfree+0x286 sys/kern/kern_descrip.c:1216
exit1(ffff8000363bcfb8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff8000363bcfb8,ffff80003c421230,ffff80003c421180) at sys_exit+0x1a sys/kern/kern_exit.c:-1

syscall(ffff80003c421230) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c421230) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x70ce398b0da0, count: 250
End of stack trace.
uvm_fault(0xfffffd805fcf5b98, 0x0, 0, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip ffffffff819fc03b cs 8 rflags 10202 cr2 0 cpl 0 rsp ffff80003c420d70
gsbase 0xffffffff83861ff0  kgsbase 0x0
panic: trap type 6, code=0, pc=ffffffff819fc03b
Starting stack trace...
panic(ffffffff8347b928) at panic+0x1d0 sys/kern/subr_prf.c:229
kerntrap(ffff80003c420cc0) at kerntrap+0x30b
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
VOP_LOCK(fffffd806c7667f0,2001) at VOP_LOCK+0x9b sys/kern/vfs_vops.c:524
vn_lock(fffffd806c7667f0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vn_close(fffffd806c7667f0,2,ffffffffffffffff,ffff8000363bcfb8) at vn_close+0x89 sys/kern/vfs_vnops.c:292
acct_shutdown() at acct_shutdown+0x8a sys/kern/kern_acct.c:361
vfs_shutdown(ffff8000363bcfb8) at vfs_shutdown+0x23 sys/kern/vfs_subr.c:1791
boot(100) at boot+0x16f sys/arch/amd64/amd64/machdep.c:929
reboot(100) at reboot+0xb1
panic(ffffffff8341912f) at panic+0x1f9
vrele(fffffd806c766dd8) at vrele+0x240 sys/kern/vfs_subr.c:823
fdfree(ffff8000363bcfb8) at fdfree+0x286 sys/kern/kern_descrip.c:1216
exit1(ffff8000363bcfb8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff8000363bcfb8,ffff80003c421230,ffff80003c421180) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80003c421230) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c421230) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x70ce398b0da0, count: 240
End of stack trace.

dump to dev 4,1 not possible
rebooting...
SeaBIOS (version 1.8.2-google)
Total RAM Size = 0x0000000080000000 = 2048 MiB
CPUs found: 2     Max CPUs supported: 2
SeaBIOS (version 1.8.2-google)
Machine UUID 43b93b83-f320-801a-a1ee-23eab263a335
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 0x000f26c0: PCHS=0/0/0 translation=lba LCHS=520/128/63 s=4194304
Sending Seabios boot VM event.
Booting from Hard Disk 0...
>> OpenBSD/amd64 BOOT 3.67
boot> set $lines = 0
set: syntax error
boot> set $maxwidth = 0
set: syntax error
boot> show panic
boot: illegal argument panic
boot> trace
boot> show registers
boot> show proc
boot> ps
boot> show all locks
boot> show malloc
boot> show all pools
boot> machine ddbcpu 0
machine: syntax error
boot> trace
boot> machine ddbcpu 1
machine: syntax error
boot> trace