panic: kernel diagnostic assertion "ps->ps_uvncount == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_unveil.c", line 188
Starting stack trace...
panic(ffffffff8294d94c) at panic+0x16f sys/kern/subr_prf.c:229
__assert(ffffffff82907749,ffffffff828c3b45,bc,ffffffff82886add) at __assert+0x29 sys/kern/subr_prf.c:157
unveil_destroy(ffff8000ffff11d8) at unveil_destroy+0x174 sys/kern/kern_unveil.c:188
exit1(ffff80002a25f558,0,0,1) at exit1+0x3ef sys/kern/kern_exit.c:218
sys_exit(ffff80002a25f558,ffff800033f505e0,ffff800033f50540) at sys_exit+0x1a sys/kern/kern_exit.c:89
syscall(ffff800033f505e0) at syscall+0x53b mi_syscall sys/sys/syscall_mi.h:183 [inline]
syscall(ffff800033f505e0) at syscall+0x53b sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x745317ddc7c0, count: 250
End of stack trace.
syncing disks...30 28 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1  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 69eb9058-0362-23fd-9d6a-f99e4488aea0
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 0x000f27f0: 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 3.65
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