panic: trap type 4, code=0, pc=ffffffff8252530b
Starting stack trace...
panic(ffffffff82febd9b) at panic+0x1d0 sys/kern/subr_prf.c:229
kerntrap(ffff80002a0988c0) at kerntrap+0x29b sys/arch/amd64/amd64/trap.c:327
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
sys_semop(ffff8000ffff2a40,ffff80002a098b70,ffff80002a098ac0) at sys_semop+0x45b sys/kern/sysv_sem.c:615
syscall(ffff80002a098b70) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline]
syscall(ffff80002a098b70) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb7de92cb840, count: 251
End of stack trace.