panic: trap type 4, code=0, pc=ffffffff81901920
Starting stack trace...
panic(ffffffff823b5436) at panic+0x14c sys/kern/subr_prf.c:218
kerntrap(ffff80002235d5e0) at kerntrap+0x1c7 sys/arch/amd64/amd64/trap.c:316
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
pfi_ifhead_RB_REMOVE(ffffffff828e2a80,ffff800000b7d000) at pfi_ifhead_RB_REMOVE+0x50 sys/net/pf_if.c:80
pfi_detach_ifgroup(ffff800000b3db80) at pfi_detach_ifgroup+0x11b pfi_kif_unref sys/net/pf_if.c:211 [inline]
pfi_detach_ifgroup(ffff800000b3db80) at pfi_detach_ifgroup+0x11b sys/net/pf_if.c:304
if_delgroup(ffff800000b1a000,ffff800000b3db80) at if_delgroup+0x193 sys/net/if.c:2681
if_detach(ffff800000b1a000) at if_detach+0x1ab sys/net/if.c:1044
tun_clone_destroy(ffff800000b1a000) at tun_clone_destroy+0x1e1 sys/net/if_tun.c:325
if_clone_destroy(ffff80002235d890) at if_clone_destroy+0x146 sys/net/if.c:1203
tun_dev_close(5d01,7) at tun_dev_close+0x140 sys/net/if_tun.c:476
spec_close(ffff80002235d960) at spec_close+0x311 sys/kern/spec_vnops.c:560
VOP_CLOSE(fffffd806e9385c8,7,fffffd807f7b7ae0,ffff8000222b57a0) at VOP_CLOSE+0xeb sys/kern/vfs_vops.c:177
vn_closefile(fffffd8069df1e58,ffff8000222b57a0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline]
vn_closefile(fffffd8069df1e58,ffff8000222b57a0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614
fdrop(fffffd8069df1e58,ffff8000222b57a0) at fdrop+0xc2 sys/kern/kern_descrip.c:1279
closef(fffffd8069df1e58,ffff8000222b57a0) at closef+0x11c sys/kern/kern_descrip.c:1263
fdfree(ffff8000222b57a0) at fdfree+0xf4 sys/kern/kern_descrip.c:1195
exit1(ffff8000222b57a0,0,0,1) at exit1+0x335 sys/kern/kern_exit.c:200
sys_exit(ffff8000222b57a0,ffff80002235dbf0,ffff80002235dc40) at sys_exit+0x16 sys/kern/kern_exit.c:96
syscall(ffff80002235dcc0) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002235dcc0) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffe8e20, count: 237
End of stack trace.