linux-kernel - Re: [PATCH 1/1] stackleak: Disable ftrace for stackleak.c

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Message-ID: <20181112115228.1c747426@vmware.local.home>
Date:   Mon, 12 Nov 2018 11:52:28 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc:     Masami Hiramatsu <mhiramat@...nel.org>,
        Alexander Popov <alex.popov@...ux.com>,
        kernel-hardening <kernel-hardening@...ts.openwall.com>,
        Kees Cook <keescook@...omium.org>,
        Jann Horn <jannh@...gle.com>, Ingo Molnar <mingo@...nel.org>,
        Andy Lutomirski <luto@...nel.org>,
        Joerg Roedel <joro@...tes.org>, Borislav Petkov <bp@...en8.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>, Jan Kara <jack@...e.cz>,
        Dan Williams <dan.j.williams@...el.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        x86 <x86@...nel.org>, linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/1] stackleak: Disable ftrace for stackleak.c

On Mon, 12 Nov 2018 09:53:29 -0500 (EST)
Mathieu Desnoyers <mathieu.desnoyers@...icios.com> wrote:


> Just to clarify: AFAIU you guys are recommending to add _both_ a "notrace"
> annotation to stackleak_erase() _and_ a NOKPROBE_SYMBOL(stackleak_erase),
> so neither function tracing nor kprobes can hook on that function.

Correct.

-- Steve