panic: pmap_remove_ptes: unmanaged page marked PG_PVLIST: va 0x20016000, opte 0xffffffffffffffff
Starting stack trace...
panic(ffffffff830782cc) at panic+0x1d0 sys/kern/subr_prf.c:229
pmap_remove_pte(fffffd806be85e98,fffffd800864b1a0,7f8000100080,20010000,20200000,0) at pmap_remove_pte
pmap_do_remove(fffffd806be85e98,20010000,21000000,0) at pmap_do_remove+0x533 sys/arch/amd64/amd64/pmap.c:1911
uvm_unmap_kill_entry_withlock(fffffd8074789538,fffffd806c11ccf0,0) at uvm_unmap_kill_entry_withlock+0x274 sys/uvm/uvm_map.c:1865
uvm_map_teardown(fffffd8074789538) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2498
uvmspace_free(fffffd8074789538) at uvmspace_free+0xcd sys/uvm/uvm_map.c:3422
reaper(ffff800029fd9448) at reaper+0x246 sys/kern/kern_exit.c:481
end trace frame: 0x0, count: 250
End of stack trace.