panic: trap type 4, code=0, pc=ffffffff81c5f8fb
Starting stack trace...
panic(ffffffff832e2a56) at panic+0x1ba sys/kern/subr_prf.c:229
kerntrap(ffff80003c9bd1f0) at kerntrap+0x28b sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
sys_semop(ffff80002a7ab4b8,ffff80003c9bd4a0,ffff80003c9bd3f0) at 
sys_semop+0x45b
syscall(ffff80003c9bd4a0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x50a697d1af0, count: 251
End of stack trace.
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