linux-kernel - Re: [PATCH -tip v3 00/23] kprobes: introduce NOKPROBE_SYMBOL() and general cleaning of kprobe blacklist

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Message-ID: <y0mvbznxi6k.fsf@fche.csb>
Date:	Wed, 20 Nov 2013 09:26:59 -0500
From:	fche@...hat.com (Frank Ch. Eigler)
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>,
	virtualization@...ts.linux-foundation.org,
	systemtap@...rceware.org, "David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH -tip v3 00/23] kprobes: introduce NOKPROBE_SYMBOL() and general cleaning of kprobe blacklist


masami.hiramatsu.pt wrote:

> [...]  This series also includes a change which prohibits probing on
> the address in .entry.text because the code is used for very
> low-level sensitive interrupt/syscall entries. Probing such code may
> cause unexpected result (actually most of that area is already in
> the kprobe blacklist).  So I've decide to prohibit probing all of
> them. [...]

Does this new blacklist cover enough that the kernel now survives a
broadly wildcarded perf-probe, e.g. over e.g. all of its kallsyms?


- FChE
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