panic: kernel diagnostic assertion "uvm_page_owner_locked_p(pg)" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 1269
Starting stack trace...
panic(ffffffff825a1e15) at panic+0x16b sys/kern/subr_prf.c:233
__assert(ffffffff82618843,ffffffff825952f1,4f5,ffffffff825cbca4) at __assert+0x25 sys/kern/subr_prf.c:161
uvm_pageunwire(fffffd800773d940) at uvm_pageunwire+0x16b sys/uvm/uvm_page.c:1269
uvm_fault_unwire_locked(fffffd806ebcbe70,8cf0449f000,8cf044a0000) at uvm_fault_unwire_locked+0x226 sys/uvm/uvm_fault.c:1681
uvm_unmap_kill_entry_withlock(fffffd806ebcbe70,fffffd80591a8300,0) at uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2127
uvm_map_teardown(fffffd806ebcbe70) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline]
uvm_map_teardown(fffffd806ebcbe70) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2762
uvmspace_free(fffffd806ebcbe70) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3675
reaper(ffff800021233a48) at reaper+0x19a sys/kern/kern_exit.c:454
end trace frame: 0x0, count: 249
End of stack trace.
syncing disks...18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18  giving up

dump to dev 4,1 not possible
rpeaboniocti:n gk.e.r.n
el diagnostSeaBIOS (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 5539092a-1476-82b6-0a34-88b96a0f4c53
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 0x000f24c0: 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 3.54
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