syzbot

panic: softclock: invalid to_clock: 1
Starting stack trace...
panic(ffffffff82fb42dd) at panic+0x1ba sys/kern/subr_prf.c:229
softclock(0) at softclock+0x276 sys/kern/kern_timeout.c:756
softintr_dispatch(0) at softintr_dispatch+0xea sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x27
Xspllower() at Xspllower+0x1d
printf(ffffffff830a0c2e) at printf+0xa3 sys/kern/subr_prf.c:532
uvm_fault_unwire_locked(fffffd80683dd578,3e697196000,3e697395000) at uvm_fault_unwire_locked+0x2f2
uvm_unmap_kill_entry_withlock(fffffd80683dd578,fffffd806c1a46c8,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1861
uvm_map_teardown(fffffd80683dd578) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2498
uvmspace_free(fffffd80683dd578) at uvmspace_free+0xbd sys/uvm/uvm_map.c:3422
reaper(ffff80002a4576d0) at reaper+0x225 sys/kern/kern_exit.c:481
end trace frame: 0x0, count: 246
End of stack trace.