Prohibit probing on native_set_debugreg and native_load_idt. Since the kprobes uses do_debug for single stepping, functions called from do_debug before notify_die must not be probed. And also native_load_idt is called from paranoid_exit when returning int3, this also must not be probed.
Signed-off-by: Masami Hiramatsu <[email protected]> Cc: Jeremy Fitzhardinge <[email protected]> Cc: Chris Wright <[email protected]> Cc: Alok Kataria <[email protected]> Cc: Rusty Russell <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: "H. Peter Anvin" <[email protected]> --- arch/x86/kernel/paravirt.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index 4c785fd..abff75f 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -390,8 +390,10 @@ __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); +NOKPROBE_SYMBOL(native_load_idt); struct pv_apic_ops pv_apic_ops = { #ifdef CONFIG_X86_LOCAL_APIC -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
