I have forgotten dmesg information :
uvm_fault(0xfffffe840c029750, 0x0, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip 0xffffffff809e7eed cs 0x8 rflags 0x10286 cr2 0x8
ilevel 0 rsp 0xfffffe811e524b80
curlwp 0xfffffe840edf3900 pid 97.1 lowest kstack 0xfffffe811e5212c0
panic: trap
cpu4: Begin traceback...
vpanic() at netbsd:vpanic+0x140
snprintf() at netbsd:snprintf
trap() at netbsd:trap+0xc6b
--- trap (number 6) ---
filt_sowdetach() at netbsd:filt_sowdetach+0x3f
knote_detach() at netbsd:knote_detach+0x70
kevent1() at netbsd:kevent1+0x686
sys___kevent50() at netbsd:sys___kevent50+0x33
syscall() at netbsd:syscall+0x1d8
--- syscall (number 435) ---
721d3fc3e1ba:
cpu4: End traceback...
