[PATCH] i386: Disallow kprobes on NMI handlers

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A kprobe executes IRET early and that could cause NMI recursion and stack
corruption.

Note: This problem was originally spotted and solved by Andi Kleen in the
x86_64 architecture. This patch is an adaption of his patch for i386.

AK: Merged with current code which was a bit different.
AK: Removed printk in nmi handler that shouldn't be there in the first time
AK: Added missing include.
AK: added KPROBES_END

Signed-off-by: Fernando Vazquez <fernando@intellilink.co.jp>
Signed-off-by: Andi Kleen <ak@suse.de>

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This commit is contained in:

Fernando Luis V�zquez Cao 2006-09-26 10:52:36 +02:00 • committed by Andi Kleen

parent 6f6b1e0477

commit 06039754d7

3 changed files with 14 additions and 10 deletions

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3

arch/i386/kernel/entry.S

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6

arch/i386/kernel/nmi.c

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15

arch/i386/kernel/traps.c

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