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| author | Andi Kleen <ak@suse.de> | 2006-02-03 21:50:41 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-02-04 16:43:12 -0800 |
| commit | eddb6fb9a54cdc8c7c37e056a2b4bbbc8a128a36 (patch) | |
| tree | c8b9a0773518f45aa86d861fce959c3c4f946b06 /arch/x86_64/kernel/entry.S | |
| parent | 2f01942536d8c686a3f6b3b38f1257caa2fb763e (diff) | |
| download | lwn-eddb6fb9a54cdc8c7c37e056a2b4bbbc8a128a36.tar.gz lwn-eddb6fb9a54cdc8c7c37e056a2b4bbbc8a128a36.zip | |
[PATCH] x86_64: Disallow kprobes on NMI handlers
A kprobe executes IRET early and that could cause NMI recursion
and stack corruption.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/x86_64/kernel/entry.S')
| -rw-r--r-- | arch/x86_64/kernel/entry.S | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86_64/kernel/entry.S b/arch/x86_64/kernel/entry.S index dbdba56e8faa..cdf9cb1288c1 100644 --- a/arch/x86_64/kernel/entry.S +++ b/arch/x86_64/kernel/entry.S @@ -922,7 +922,7 @@ KPROBE_ENTRY(debug) .previous .text /* runs on exception stack */ -ENTRY(nmi) +KPROBE_ENTRY(nmi) INTR_FRAME pushq $-1 CFI_ADJUST_CFA_OFFSET 8 @@ -969,6 +969,7 @@ paranoid_schedule: cli jmp paranoid_userspace CFI_ENDPROC + .previous .text KPROBE_ENTRY(int3) INTR_FRAME |