panic: kernel diagnostic assertion "ps->ps_uvncount == 0" failed: file "/syzkaller/managers/main/kernel/sys/kern/kern_unveil.c", line 188
Starting stack trace...
panic(ffffffff82882ba2) at panic+0x159 sys/kern/subr_prf.c:229
__assert(ffffffff82908969,ffffffff8287c4d4,bc,ffffffff8289efc1) at __assert+0x29 sys/kern/subr_prf.c:157
unveil_destroy(ffff80002a68e1a0) at unveil_destroy+0x1a4 sys/kern/kern_unveil.c:188
exit1(ffff80002a6b22c0,0,0,3) at exit1+0x3b8 sys/kern/kern_exit.c:218
single_thread_check_locked(ffff80002a6b22c0,0,0) at single_thread_check_locked+0x1f6 sys/kern/kern_sig.c:2039
userret(ffff80002a6b22c0) at userret+0x6f single_thread_check sys/kern/kern_sig.c:2058 [inline]
userret(ffff80002a6b22c0) at userret+0x6f sys/kern/kern_sig.c:1974
syscall(ffff8000377ef160) at syscall+0x801 mi_syscall_return sys/sys/syscall_mi.h:210 [inline]
syscall(ffff8000377ef160) at syscall+0x801 sys/arch/amd64/amd64/trap.c:598
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7d4d43e02ca0, count: 249
End of stack trace.
syncing disks...23 18  done

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 d662f6a5-d763-0b53-7cd8-e4e6b0001699
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 0x000f2860: 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> 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