panic: trap type 4, code=0, pc=ffffffff8173de50
Starting stack trace...
panic(ffffffff823b43f9) at panic+0x14c sys/kern/subr_prf.c:218
kerntrap(ffff8000222e30d0) at kerntrap+0x1c7 sys/arch/amd64/amd64/trap.c:316
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
pfi_ifhead_RB_REMOVE(ffffffff828d2c50,ffff800000b41900) at pfi_i