linux-kernel - Re: [PATCH -tip v6 06/22] [BUGFIX] x86: Prohibit probing on memcpy/memset

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Message-ID: <CAGdX0WFKYHqXrVQ6LBw0YgH_H6cP=LZVCBe1iOvEXsHQPD8Zmg@mail.gmail.com>
Date:	Thu, 19 Dec 2013 17:37:25 +0800
From:	Jovi Zhangwei <jovi.zhangwei@...il.com>
To:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc:	Ingo Molnar <mingo@...nel.org>, linux-arch@...r.kernel.org,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Sandeepa Prabhu <sandeepa.prabhu@...aro.org>, x86@...nel.org,
	lkml <linux-kernel@...r.kernel.org>,
	"Steven Rostedt (Red Hat)" <rostedt@...dmis.org>,
	Ingo Molnar <mingo@...hat.com>, systemtap@...rceware.org,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH -tip v6 06/22] [BUGFIX] x86: Prohibit probing on memcpy/memset

Hi Masami,

On Thu, Dec 19, 2013 at 5:04 PM, Masami Hiramatsu
<masami.hiramatsu.pt@...achi.com> wrote:
> memcpy/memset functions are fundamental functions and
> those are involved in kprobe's exception handling.
> Prohibit probing on them to avoid kernel crash.
>
Would you please let me know the LKML link of that bugfix, I cannot
find it in my LKML fold.

No objection on this patch. :) just want to know more, It seems there
have no problem to probe memcpy in my box, maybe I didn't hit the
crash code path.

Thanks.

Jovi
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