uvm_fault(0xfffffd806b3fd208, 0x0, 0, 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip ffffffff82a8eed8 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80002a37a7a0
gsbase 0xffffffff83856ff0  kgsbase 0x0
panic: trap type 6, code=0, pc=ffffffff82a8eed8
Starting stack trace...
panic(ffffffff833a159c) at panic+0x1d0 sys/kern/subr_prf.c:229
kerntrap(ffff80002a37a6f0) at kerntrap+0x30b
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
dt_ioctl_record_stop(ffff800001517000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586
dtclose(11e5f,1,2000,ffff8000fffe7780) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline]
dtclose(11e5f,1,2000,ffff8000fffe7780) at dtclose+0x109 sys/dev/dt/dt_dev.c:232
spec_close(ffff80002a37a8a0) at spec_close+0x466 sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd8075fd0888,1,fffffd80097fb4e0,ffff8000fffe7780) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156
vn_closefile(fffffd806ae54ad8,ffff8000fffe7780) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806ae54ad8,ffff8000fffe7780) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615
fdrop(fffffd806ae54ad8,ffff8000fffe7780) at fdrop+0x121 sys/kern/kern_descrip.c:1280
closef(fffffd806ae54ad8,ffff8000fffe7780) at closef+0x192 sys/kern/kern_descrip.c:1264
fdfree(ffff8000fffe7780) at fdfree+0x116 sys/kern/kern_descrip.c:1195
exit1(ffff8000fffe7780,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff8000fffe7780,ffff80002a37ac10,ffff80002a37ab60) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a37ac10) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a37ac10) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x736d66a06d10, count: 242
End of stack trace.

dump to dev 4,1 not possible