From: Jan Beulich <jbeulich@novell.com>
Date: Fri, 6 Jan 2006 08:11:49 +0000 (-0800)
Subject: [PATCH] i386: fix bound check IDT gate
X-Git-Tag: v2.6.16-rc1~936^2~208
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=eb05c3249a8e8a675e79d221f4a0874dc10ec903;p=linux-2.6

[PATCH] i386: fix bound check IDT gate

Other than apparently commonly assumed, the bound instruction does not
require the corresponding IDT entry to have DPL 3.

Acked-by: "Seth, Rohit" <rohit.seth@intel.com>
Acked-by: Zachary Amsden <zach@vmware.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/arch/i386/kernel/traps.c b/arch/i386/kernel/traps.c
index f0c4060bd4..53ad954e3b 100644
--- a/arch/i386/kernel/traps.c
+++ b/arch/i386/kernel/traps.c
@@ -1078,9 +1078,9 @@ void __init trap_init(void)
 	set_trap_gate(0,&divide_error);
 	set_intr_gate(1,&debug);
 	set_intr_gate(2,&nmi);
-	set_system_intr_gate(3, &int3); /* int3-5 can be called from all */
+	set_system_intr_gate(3, &int3); /* int3/4 can be called from all */
 	set_system_gate(4,&overflow);
-	set_system_gate(5,&bounds);
+	set_trap_gate(5,&bounds);
 	set_trap_gate(6,&invalid_op);
 	set_trap_gate(7,&device_not_available);
 	set_task_gate(8,GDT_ENTRY_DOUBLEFAULT_TSS);