linux-kernel - Re: [PATCH 2/2] kprobe: fix: Add ftrace_ops_assist

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Date:   Fri, 16 Mar 2018 12:48:40 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc:     Francis Deslauriers <francis.deslauriers@...icios.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH 2/2] kprobe: fix: Add ftrace_ops_assist_func to kprobe
 blacklist

On Fri, 16 Mar 2018 12:41:34 -0400
Steven Rostedt <rostedt@...dmis.org> wrote:

> Yes, kprobes are dangerous. I'm not saying it shouldn't be fixed, I'm
> saying that I don't have time to fix it now, but would be happy to
> accept patches if someone else does so.

And looking at what I replied before for the original patch. It would
probably be a good idea to blacklist directories. Like we do with
function tracing. We probably should black list both kernel/tracing and
kernel/events from being probed.

Did this come up at plumbers? You were there too, I don't remember
discussing it there.

-- Steve