panic: trap type 4, code=0, pc=ffffffff81e94c5e
Starting stack trace...
panic(ffffffff82fb332d) at panic+0x1ba sys/kern/subr_prf.c:229
kerntrap(ffff800037630dd0) at kerntrap+0x28b sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
sys_semop(ffff80002a4d3460,ffff800037631080,ffff800037630fd0) at sys_semop+0x3ae sys/kern/sysv_sem.c:620
syscall(ffff800037631080) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x3d08316dd50, count: 251
End of stack trace.