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authorMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>2014-04-17 10:17:19 +0200
committerIngo Molnar <mingo@kernel.org>2014-04-24 10:02:58 +0200
commit8027197220e02d5cebbbfdff36c2827661fbc692 (patch)
treec1f5505611ab6364599486f95370f6ba72411367 /arch/x86/kernel/paravirt.c
parentkprobes, x86: Prohibit probing on debug_stack_*() (diff)
downloadlinux-8027197220e02d5cebbbfdff36c2827661fbc692.tar.xz
linux-8027197220e02d5cebbbfdff36c2827661fbc692.zip
kprobes, x86: Prohibit probing on native_set_debugreg()/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 <masami.hiramatsu.pt@hitachi.com> Reviewed-by: Steven Rostedt <rostedt@goodmis.org> Cc: Alok Kataria <akataria@vmware.com> Cc: Chris Wright <chrisw@sous-sol.org> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: virtualization@lists.linux-foundation.org Link: http://lkml.kernel.org/r/20140417081719.26341.65542.stgit@ltc230.yrl.intra.hitachi.co.jp Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/paravirt.c')
-rw-r--r--arch/x86/kernel/paravirt.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index e136869ae42e..548d25f00c90 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 a real function entry */
+/* At this point, native_get/set_debugreg has real function entries */
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