uvm_fault(0xfffffd806b9b97b8, 0x0, 0, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip ffffffff831def38 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff8000fffe91f0
gsbase 0xffffffff837d7ff0  kgsbase 0x0
panic: trap type 6, code=0, pc=ffffffff831def38
Starting stack trace...
panic(ffffffff833a4594) at panic+0x1d0 sys/kern/subr_prf.c:229
kerntrap(ffff8000fffe9140) at kerntrap+0x30b
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
dt_ioctl_record_stop(ffff8000016a5000) at
 dt_ioctl_record_stop+0x108
dtclose(11e5f,81,2000,ffff80002a29ca78) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline]
dtclose(11e5f,81,2000,ffff80002a29ca78) at dtclose+0x109 sys/dev/dt/dt_dev.c:232
spec_close(ffff8000fffe92f0) at spec_close+0x466 sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd805a5c2bf0,81,fffffd80097fb750,ffff80002a29ca78) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156
vn_closefile(fffffd806c40da18,ffff80002a29ca78) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806c40da18,ffff80002a29ca78) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615
fdrop(fffffd806c40da18,ffff80002a29ca78) at fdrop+0x121 sys/kern/kern_descrip.c:1280
closef(fffffd806c40da18,ffff80002a29ca78) at closef+0x192 sys/kern/kern_descrip.c:1264
fdfree(ffff80002a29ca78) at fdfree+0x116 sys/kern/kern_descrip.c:1195
exit1(ffff80002a29ca78,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff80002a29ca78,ffff8000fffe9660,ffff8000fffe95b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff8000fffe9660) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000fffe9660) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x74d73386bd10, count: 242
End of stack trace.

dump to dev 4,1 not possible