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| author | Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> | 2014-04-17 08:17:19 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-04-24 08:02:58 (GMT) |
| commit | 8027197220e02d5cebbbfdff36c2827661fbc692 (patch) | |
| tree | c1f5505611ab6364599486f95370f6ba72411367 /arch/x86/kernel/paravirt.c | |
| parent | 0f46efeb44e360b78f54a968b4d92e6877c35891 (diff) | |
| download | linux-8027197220e02d5cebbbfdff36c2827661fbc692.tar.xz | |
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.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index e136869..548d25f 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 |