kprobes, x86: Prohibit probing on native_set_debugreg()/load_idt()
authorMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Thu, 17 Apr 2014 08:17:19 +0000 (17:17 +0900)
committerIngo Molnar <mingo@kernel.org>
Thu, 24 Apr 2014 08:02:58 +0000 (10:02 +0200)
commit8027197220e02d5cebbbfdff36c2827661fbc692
treec1f5505611ab6364599486f95370f6ba72411367
parent0f46efeb44e360b78f54a968b4d92e6877c35891
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>
arch/x86/kernel/paravirt.c