panic: softclock: invalid to_clock: 720896
Starting stack trace...
panic(ffffffff8285200a) at panic+0x16f sys/kern/subr_prf.c:229
softclock(0) at softclock+0x22d sys/kern/kern_timeout.c:759
softintr_dispatch(0) at softintr_dispatch+0xcd sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x27
pmap_do_remove(fffffd807776f2f8,332006d4000,33200720000,0) at pmap_do_remove+0x513 sys/arch/amd64/amd64/pmap.c:1801
uvm_unmap_kill_entry_withlock(fffffd8076d76e18,fffffd80766575b8,0) at uvm_unmap_kill_entry_withlock+0x1b1 sys/uvm/uvm_map.c:1928
uvm_map_teardown(fffffd8076d76e18) at uvm_map_teardown+0x1c7 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline]
uvm_map_teardown(fffffd8076d76e18) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2565
uvmspace_free(fffffd8076d76e18) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3497
reaper(ffff80002a145d50) at reaper+0x19a sys/kern/kern_exit.c:463
end trace frame: 0x0, count: 248
End of stack trace.