panic: pmap_remove_ptes: unmanaged page marked PG_PVLIST: va 0x977c6a16000, opte 0xffffffffffffffff
Starting stack trace...
panic(ffffffff830759b6) at panic+0x1d0 sys/kern/subr_prf.c:229
pmap_remove_pte(fffffd807ec5a9b0,fffffd80080fc240,7f84bbe35000,977c6a00000,977c6b8d000,0) at pmap_remove_pte
pmap_do_remove(fffffd807ec5a9b0,977c698e000,977c6b8d000,0) at pmap_do_remove+0x533 sys/arch/amd64/amd64/pmap.c:1911
uvm_unmap_kill_entry_withlock(fffffd8057198538,fffffd807d82b898,0) at uvm_unmap_kill_entry_withlock+0x274 sys/uvm/uvm_map.c:1865
uvm_map_teardown(fffffd8057198538) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2498
uvmspace_free(fffffd8057198538) at uvmspace_free+0xcd sys/uvm/uvm_map.c:3422
reaper(ffff800029fd96d0) at reaper+0x256 sys/kern/kern_exit.c:483
end trace frame: 0x0, count: 250
End of stack trace.