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Date: Tue, 28 Nov 2017 08:58:44 +0530
From: Kaiwan N Billimoria <>
To: "Tobin C. Harding" <>
Cc: Kees Cook <>,, 
	LKML <>, Network Development <>, 
	Steven Rostedt <>, Tycho Andersen <>
Subject: Re: Re: [RFC 0/3] kallsyms: don't leak address
 when printing symbol

On Tue, Nov 28, 2017 at 7:20 AM, Tobin C. Harding <> wrote:
> Noob question: how do we _know_ this. In other words how do we know no
> userland tools rely on the current behaviour? No stress to answer Kees,
> this is a pretty general kernel dev question.

Perhaps I'm reading this wrong, but anyway: besides ftrace, kprobes
will require a
symbol-to-address lookup. Specifically, in the function
kprobe_lookup_name() which
in turn invokes kallsyms_lookup_name().
AFAIK, SystemTap (userland) is built on top of the kprobes infrastructure..


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