syzbot

panic: softclock: invalid to_clock: 16144
Starting stack trace...
panic(ffffffff82856f80) 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(ffffffff8294743a) at printf+0x88 sys/kern/subr_prf.c:532
uvm_fault_unwire_locked(fffffd805efa9c10,8b5310b1000,8b5312b0000) at uvm_fault_unwire_locked+0x211
uvm_unmap_kill_entry_withlock(fffffd805efa9c10,fffffd806b7d38a8,0) at uvm_unmap_kill_entry_withlock+0x6b sys/uvm/uvm_map.c:1894
uvm_map_teardown(fffffd805efa9c10) at uvm_map_teardown+0x1c7 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline]
uvm_map_teardown(fffffd805efa9c10) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2534
uvmspace_free(fffffd805efa9c10) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3461
reaper(ffff80002a1491f8) at reaper+0x197 sys/kern/kern_exit.c:463
end trace frame: 0x0, count: 246
End of stack trace.