panic: trap type 4, code=0, pc=ffffffff828c7bfb
Starting stack trace...
panic(ffffffff832e4cd7) at panic+0x1ba sys/kern/subr_prf.c:229
kerntrap(ffff80003ca05960) at kerntrap+0x28b sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
sys_semop(ffff80002a7bd9b8,ffff80003ca05c10,ffff80003ca05b60) at sys_semop+0x45b sys/kern/sysv_sem.c:615
syscall(ffff80003ca05c10) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xdd21c5c61b0, count: 251
End of stack trace.