panic: trap type 4, code=0, pc=ffffffff81721e20
Starting stack trace...
panic(ffffffff8239c3a5) at panic+0x14c sys/kern/subr_prf.c:218
kerntrap(ffff800020067710) at kerntrap+0x1b7 sys/arch/amd64/amd64/trap.c:317
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
pfi_ifhead_RB_REMOVE(ffffffff827def80,ffff800000b3d600) at pfi_ifhead_RB_REMOVE+0x50 sys/net/pf_if.c:80
pfi_detach_ifgroup(ffff800000aee980) at pfi_detach_ifgroup+0x11b pfi_kif_unref sys/net/pf_if.c:211 [inline]
pfi_detach_ifgroup(ffff800000aee980) at pfi_detach_ifgroup+0x11b sys/net/pf_if.c:304
if_delgroup(ffff800000ade800,ffff800000aee980) at if_delgroup+0x193 sys/net/if.c:2679
if_detach(ffff800000ade800) at if_detach+0x1ab sys/net/if.c:1042
tun_clone_destroy(ffff800000ade800) at tun_clone_destroy+0x1c7 sys/net/if_tun.c:325
if_clone_destroy(ffff8000200679c0) at if_clone_destroy+0x136 sys/net/if.c:1201
tun_dev_close(5d01,7) at tun_dev_close+0x140 sys/net/if_tun.c:476
spec_close(ffff800020067a90) at spec_close+0x311 sys/kern/spec_vnops.c:560
VOP_CLOSE(fffffd8067673b60,7,fffffd806c3bfa20,ffff80001d8e9218) at VOP_CLOSE+0xe2 sys/kern/vfs_vops.c:177
vn_closefile(fffffd8059790cc0,ffff80001d8e9218) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline]
vn_closefile(fffffd8059790cc0,ffff80001d8e9218) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614
fdrop(fffffd8059790cc0,ffff80001d8e9218) at fdrop+0xc2 sys/kern/kern_descrip.c:1279
closef(fffffd8059790cc0,ffff80001d8e9218) at closef+0x117 sys/kern/kern_descrip.c:1263
fdfree(ffff80001d8e9218) at fdfree+0xf3 sys/kern/kern_descrip.c:1195
exit1(ffff80001d8e9218,0,19,1) at exit1+0x320 sys/kern/kern_exit.c:197
postsig(ffff80001d8e9218,19) at postsig+0x4af sigexit sys/kern/kern_sig.c:1486 [inline]
postsig(ffff80001d8e9218,19) at postsig+0x4af sys/kern/kern_sig.c:1418
userret(ffff80001d8e9218) at userret+0x149 sys/kern/kern_sig.c:1906
syscall(ffff800020067f10) at syscall+0x429 mi_syscall_return sys/sys/syscall_mi.h:129 [inline]
syscall(ffff800020067f10) at syscall+0x429 sys/arch/amd64/amd64/trap.c:613
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7fffffab10, count: 236
End of stack trace.