panic: kernel diagnostic assertion "pr->ps_threadcnt == 0" failed: file "/syzkaller/managers/main/kernel/sys/kern/kern_exit.c", line 886
Starting stack trace...
panic(ffffffff8337b339) at panic+0x1ba sys/kern/subr_prf.c:229
__assert(ffffffff833bb57e,ffffffff833dcde1,376,ffffffff833dce16) at __assert+0x29 sys/kern/subr_prf.c:-1
process_zap(ffff800034100018) at process_zap+0x31d sys/kern/kern_exit.c:887
reaper(ffff80002a72d758) at reaper+0x290 sys/kern/kern_exit.c:521
end trace frame: 0x0, count: 253
End of stack trace.
syncing disks...41 29 
1 1 1 1 1 1 set $lines = 0
1 1 1 set $maxwidth = 0
1 1 show panic
1 1 trace
1 1 show registers
1 show proc
1 1 ps
 giving up

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 9c8ab089-5fb3-144b-a4ba-2e178800b25c
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 0x000f26e0: 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> show malloc
boot: illegal argument malloc
boot> show all pools
boot> machine ddbcpu 0
machine: syntax error
boot> trace
boot> machine ddbcpu 1
machine: syntax error
boot> trace