From 8db54c2637b1d79e99793231e0b0a9a381997932 Mon Sep 17 00:00:00 2001
From: NAKAMURA Gou <go.nakamura.yw@hitachi-solutions.com>
Date: Tue, 3 Mar 2015 17:30:34 +0900
Subject: [PATCH] make GPE on CPL0 cause panic

---
 arch/x86/kernel/cpu.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/kernel/cpu.c b/arch/x86/kernel/cpu.c
index f2ddfa96..105c5f7c 100644
--- a/arch/x86/kernel/cpu.c
+++ b/arch/x86/kernel/cpu.c
@@ -615,6 +615,9 @@ void gpe_handler(struct x86_user_context *regs)
 	kprintf("General protection fault (err: %lx, %lx:%lx)\n",
 	        regs->gpr.error, regs->gpr.cs, regs->gpr.rip);
 	arch_show_interrupt_context(regs);
+	if ((regs->gpr.cs & 3) == 0) {
+		panic("gpe_handler");
+	}
 	set_signal(SIGSEGV, regs, NULL);
 	check_signal(0, regs);
 	check_need_resched();