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Re: [PATCH -tip v8 06/26] [BUGFIX] x86: Prohibit probing on native_set_debugreg/load_idt
- From: Steven Rostedt <rostedt at goodmis dot org>
- To: Masami Hiramatsu <masami dot hiramatsu dot pt at hitachi dot com>
- Cc: linux-kernel at vger dot kernel dot org, Ingo Molnar <mingo at kernel dot org>, Jeremy Fitzhardinge <jeremy at goop dot org>, x86 at kernel dot org, Andi Kleen <andi at firstfloor dot org>, Ananth N Mavinakayanahalli <ananth at in dot ibm dot com>, Sandeepa Prabhu <sandeepa dot prabhu at linaro dot org>, Frederic Weisbecker <fweisbec at gmail dot com>, Rusty Russell <rusty at rustcorp dot com dot au>, Chris Wright <chrisw at sous-sol dot org>, fche at redhat dot com, mingo at redhat dot com, systemtap at sourceware dot org, "H. Peter Anvin" <hpa at zytor dot com>, Thomas Gleixner <tglx at linutronix dot de>, Alok Kataria <akataria at vmware dot com>
- Date: Fri, 21 Mar 2014 20:53:19 -0400
- Subject: Re: [PATCH -tip v8 06/26] [BUGFIX] x86: Prohibit probing on native_set_debugreg/load_idt
- Authentication-results: sourceware.org; auth=none
- References: <20140305115843 dot 22766 dot 8355 dot stgit at ltc230 dot yrl dot intra dot hitachi dot co dot jp> <20140305115925 dot 22766 dot 31964 dot stgit at ltc230 dot yrl dot intra dot hitachi dot co dot jp>
On Wed, 05 Mar 2014 20:59:25 +0900
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> wrote:
> 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 <masami.hiramatsu.pt@hitachi.com>
> Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Reviewed-by: Steven Rostedt <rostedt@goodmis.org>
-- Steve