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authorJan Beulich <JBeulich@novell.com>2005-11-13 16:06:52 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-13 18:14:13 -0800
commite27182088e607880713d9c286a3d92d861c280e4 (patch)
tree2d2f43b45e377c3bfe093c2c0ca037d930f20176
parent27d99f7ead8cd6d2231798bff0d4c38814afea22 (diff)
[PATCH] i386: NMI pointer comparison fix
Instruction pointer comparisons for the NMI on debug stack check/fixup were incorrect. From: Jan Beulich <jbeulich@novell.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Zwane Mwaikambo <zwane@holomorphy.com> Acked-by: "Seth, Rohit" <rohit.seth@intel.com> Cc: Zachary Amsden <zach@vmware.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--arch/i386/kernel/entry.S7
1 files changed, 3 insertions, 4 deletions
diff --git a/arch/i386/kernel/entry.S b/arch/i386/kernel/entry.S
index 9e24f7b207e..e50b9315524 100644
--- a/arch/i386/kernel/entry.S
+++ b/arch/i386/kernel/entry.S
@@ -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