Messages in this thread Patch in this message |  | | Subject | [PATCH -tip v4 4/6] [BUGFIX] x86: Prohibit probing on native_set_debugreg | From | Masami Hiramatsu <> | Date | Wed, 04 Dec 2013 01:28:51 +0000 |
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Since the kprobes uses do_debug for single stepping, functions called from do_debug before notify_die must not be probed. This prohibits probing on native_set_debugreg which is used in do_debug.
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Chris Wright <chrisw@sous-sol.org> Cc: Alok Kataria <akataria@vmware.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> --- arch/x86/kernel/paravirt.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index 4c785fd..108e685 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -390,8 +390,9 @@ __visible struct pv_cpu_ops pv_cpu_ops = { .end_context_switch = paravirt_nop, }; -/* At this point, native_get_debugreg has real function entry */ +/* At this point, native_get/set_debugreg has real function entry */ NOKPROBE_SYMBOL(native_get_debugreg); +NOKPROBE_SYMBOL(native_set_debugreg); struct pv_apic_ops pv_apic_ops = { #ifdef CONFIG_X86_LOCAL_APIC
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