panic: pmap_remove_ptes: unmanaged page marked PG_PVLIST: va 0x20016000, opte 0xffffffffffffffff
Starting stack trace...
panic(ffffffff828e88de) at panic+0x16f sys/kern/subr_prf.c:229
pmap_remove_ptes(fffffd806e979ab0,fffffd80082c9ac0,7f8000100080,20010000,20200000,0,700eac1139a36301) at pmap_remove_ptes+0x33e
pmap_do_remove(fffffd806e979ab0,20010000,20fec000,0) at pmap_do_remove+0x410 sys/arch/amd64/amd64/pmap.c:1896
uvm_unmap_kill_entry_withlock(fffffd807235fa98,fffffd80796a4bf8,0) at uvm_unmap_kill_entry_withlock+0x1b1 sys/uvm/uvm_map.c:1928
uvm_map_teardown(fffffd807235fa98) at uvm_map_teardown+0x1c7 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline]
uvm_map_teardown(fffffd807235fa98) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2565
uvmspace_free(fffffd807235fa98) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3497
reaper(ffff80002a146548) at reaper+0x19a sys/kern/kern_exit.c:463
end trace frame: 0x0, count: 250
End of stack trace.