panic: pmap_remove_ptes: unmanaged page marked PG_PVLIST: va 0x20016000, opte 0xffffffffffffffff
Starting stack trace...
panic(ffffffff828f47e7) at panic+0x16f sys/kern/subr_prf.c:229
pmap_remove_ptes(fffffd807eff15d0,fffffd80079644a0,7f8000100080,20010000,20200000,0,bd598a9ed2df8cfd) at pmap_remove_ptes+0x33e
pmap_do_remove(fffffd807eff15d0,20010000,21000000,0) at pmap_do_remove+0x410 sys/arch/amd64/amd64/pmap.c:1896
uvm_unmap_kill_entry_withlock(fffffd8068728540,fffffd806f22f808,0) at uvm_unmap_kill_entry_withlock+0x1b1 sys/uvm/uvm_map.c:1897
uvm_map_teardown(fffffd8068728540) at uvm_map_teardown+0x1c7 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline]
uvm_map_teardown(fffffd8068728540) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2534
uvmspace_free(fffffd8068728540) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3461
reaper(ffff80002a148a48) at reaper+0x197 sys/kern/kern_exit.c:463
end trace frame: 0x0, count: 250
End of stack trace.