From: "Jan Beulich" <JBeulich@novell.com>
To: <linux-kernel@vger.kernel.org>
Subject: [PATCH] i386 NMI pointer comparison fix
Date: Mon, 07 Nov 2005 13:52:04 +0100 [thread overview]
Message-ID: <436F5C04.76F0.0078.0@novell.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 153 bytes --]
Instruction pointer comparisons for the NMI on debug stack check/fixup
were incorrect.
From: Jan Beulich <jbeulich@novell.com>
(actual patch attached)
[-- Attachment #2: linux-2.6.14-i386-nmi-stack.patch --]
[-- Type: application/octet-stream, Size: 679 bytes --]
Instruction pointer comparisons for the NMI on debug stack check/fixup
were incorrect.
From: Jan Beulich <jbeulich@novell.com>
--- /home/jbeulich/tmp/linux-2.6.14/arch/i386/kernel/entry.S 2005-10-28 02:02:08.000000000 +0200
+++ 2.6.14/arch/i386/kernel/entry.S 2005-11-04 12:18:57.000000000 +0100
@@ -560,11 +560,10 @@ nmi_stack_fixup:
nmi_debug_stack_check:
cmpw $__KERNEL_CS,16(%esp)
jne nmi_stack_correct
- cmpl $debug - 1,(%esp)
- jle nmi_stack_correct
+ cmpl $debug,(%esp)
+ jb nmi_stack_correct
cmpl $debug_esp_fix_insn,(%esp)
- jle nmi_debug_stack_fixup
-nmi_debug_stack_fixup:
+ ja nmi_stack_correct
FIX_STACK(24,nmi_stack_correct, 1)
jmp nmi_stack_correct
reply other threads:[~2005-11-07 12:51 UTC|newest]
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