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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/nmi.c | |
| parent | 2f01942536d8c686a3f6b3b38f1257caa2fb763e (diff) | |
| download | talos-obmc-linux-eddb6fb9a54cdc8c7c37e056a2b4bbbc8a128a36.tar.gz talos-obmc-linux-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/nmi.c')
| -rw-r--r-- | arch/x86_64/kernel/nmi.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/x86_64/kernel/nmi.c b/arch/x86_64/kernel/nmi.c index 5fae6f0cd994..8be407a1f62d 100644 --- a/arch/x86_64/kernel/nmi.c +++ b/arch/x86_64/kernel/nmi.c @@ -24,6 +24,7 @@ #include <linux/sysdev.h> #include <linux/nmi.h> #include <linux/sysctl.h> +#include <linux/kprobes.h> #include <asm/smp.h> #include <asm/mtrr.h> @@ -468,7 +469,7 @@ void touch_nmi_watchdog (void) touch_softlockup_watchdog(); } -void nmi_watchdog_tick (struct pt_regs * regs, unsigned reason) +void __kprobes nmi_watchdog_tick(struct pt_regs * regs, unsigned reason) { int sum; int touched = 0; @@ -512,14 +513,14 @@ void nmi_watchdog_tick (struct pt_regs * regs, unsigned reason) } } -static int dummy_nmi_callback(struct pt_regs * regs, int cpu) +static __kprobes int dummy_nmi_callback(struct pt_regs * regs, int cpu) { return 0; } static nmi_callback_t nmi_callback = dummy_nmi_callback; -asmlinkage void do_nmi(struct pt_regs * regs, long error_code) +asmlinkage __kprobes void do_nmi(struct pt_regs * regs, long error_code) { int cpu = safe_smp_processor_id(); |
