panic: trap type 4, code=0, pc=ffffffff81c5284b
Starting stack trace...
panic(ffffffff832dfc53) at panic+0x1ba sys/kern/subr_prf.c:229
kerntrap(ffff80003c9974c0) at kerntrap+0x28b sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
sys_semop(ffff80002a807c48,ffff80003c997770,ffff80003c9976c0) at sys_semop+0x45b sys/kern/sysv_sem.c:615
syscall(ffff80003c997770) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x348d37e1510, count: 251
End of stack trace.