panic: softclock: invalid to_clock: -2130358673 Starting stack trace... panic(ffffffff8285cde3) 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 Xspllower() at Xspllower+0x1d printf(ffffffff82949e8a) at printf+0x88 sys/kern/subr_prf.c:532 uvm_fault_unwire_locked(fffffd807921ddd0,a19bec49000,a19bee48000) at uvm_fault_unwire_locked+0x211 uvm_unmap_kill_entry_withlock(fffffd807921ddd0,fffffd80695c27b0,0) at uvm_unmap_kill_entry_withlock+0x6b sys/uvm/uvm_map.c:1894 uvm_map_teardown(fffffd807921ddd0) at uvm_map_teardown+0x1c7 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd807921ddd0) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2534 uvmspace_free(fffffd807921ddd0) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3461 reaper(ffff80002a149488) at reaper+0x197 sys/kern/kern_exit.c:463 end trace frame: 0x0, count: 246 End of stack trace.