panic: pmap_remove_ptes: unmanaged page marked PG_PVLIST: va 0x1b2de60000, opte 0x3edff Starting stack trace... panic(ffffffff8306b6fa) at panic+0x1d0 sys/kern/subr_prf.c:229 pmap_remove_pte(fffffd8069d9a5e0,fffffd800818af60,7f800d96f300,1b2de60000,1b2e000000,0) at pmap_remove_pte pmap_do_remove(fffffd8069d9a5e0,1b2de60000,1b2e220000,0) at pmap_do_remove+0x533 sys/arch/amd64/amd64/pmap.c:1909 uvm_unmap_kill_entry_withlock(fffffd80749bd6f0,fffffd8062ba6400,0) at uvm_unmap_kill_entry_withlock+0x274 sys/uvm/uvm_map.c:1883 uvm_map_teardown(fffffd80749bd6f0) at uvm_map_teardown+0x267 sys/uvm/uvm_map.c:2520 uvmspace_free(fffffd80749bd6f0) at uvmspace_free+0xe8 sys/uvm/uvm_map.c:3447 reaper(ffff800029fd91c0) at reaper+0x25b sys/kern/kern_exit.c:480 end trace frame: 0x0, count: 250 End of stack trace.