From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Peter Zijlstra <peterz@infradead.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
stable@vger.kernel.org,
Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Subject: Re: [RFA][PATCH 5/5] tracepoint: Warn and notify if tracepoints are not loaded due to module taint
Date: Thu, 27 Feb 2014 17:16:52 +0000 (UTC) [thread overview]
Message-ID: <1115204009.31806.1393521412861.JavaMail.zimbra@efficios.com> (raw)
In-Reply-To: <20140227120925.7da36f0b@gandalf.local.home>
----- Original Message -----
> From: "Steven Rostedt" <rostedt@goodmis.org>
> To: "Mathieu Desnoyers" <mathieu.desnoyers@efficios.com>
> Cc: linux-kernel@vger.kernel.org, "Ingo Molnar" <mingo@kernel.org>, "Andrew Morton" <akpm@linux-foundation.org>,
> "Peter Zijlstra" <peterz@infradead.org>, "Frederic Weisbecker" <fweisbec@gmail.com>, stable@vger.kernel.org,
> "Mathieu Desnoyers" <mathieu.desnoyers@polymtl.ca>
> Sent: Thursday, February 27, 2014 12:09:25 PM
> Subject: Re: [RFA][PATCH 5/5] tracepoint: Warn and notify if tracepoints are not loaded due to module taint
>
> On Thu, 27 Feb 2014 16:33:50 +0000 (UTC)
> Mathieu Desnoyers <mathieu.desnoyers@efficios.com> wrote:
>
>
> > I'd recommend the following message instead:
> >
> > pr_err("Module '%s' is tainted, ignoring its tracepoints\n",
> >
>
> Better?
Yep, thanks!
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
>
> -- Steve
>
> From 08ea384dc937d75a2a1444a06c3e4553bd118fc1 Mon Sep 17 00:00:00 2001
> From: "Steven Rostedt (Red Hat)" <rostedt@goodmis.org>
> Date: Mon, 24 Feb 2014 11:06:04 -0500
> Subject: [PATCH] tracepoint: Warn and notify if tracepoints are not loaded
> due
> to module taint
>
> If a module is loaded that is tainted with anything but OOT or CRAP, then
> it will not create the tracepoint infrastructure for the module. The user
> needs
> to be warned when this happens instead of exiting silently.
>
> Fixes: 97e1c18e8d17 "tracing: Kernel Tracepoints"
> Cc: stable@vger.kernel.org
> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
> ---
> kernel/tracepoint.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/kernel/tracepoint.c b/kernel/tracepoint.c
> index 63630ae..1d33831 100644
> --- a/kernel/tracepoint.c
> +++ b/kernel/tracepoint.c
> @@ -649,8 +649,12 @@ static int tracepoint_module_coming(struct module *mod)
> * module headers (for forced load), to make sure we don't cause a crash.
> * Staging and out-of-tree GPL modules are fine.
> */
> - if (trace_module_has_bad_taint(mod))
> + if (trace_module_has_bad_taint(mod)) {
> + pr_err("Module '%s' is tainted, ignoring its tracepoints\n",
> + mod->name);
> return 0;
> + }
> +
> mutex_lock(&tracepoints_mutex);
> tp_mod = kmalloc(sizeof(struct tp_module), GFP_KERNEL);
> if (!tp_mod) {
> --
> 1.8.1.4
>
>
--
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com
prev parent reply other threads:[~2014-02-27 17:16 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-27 15:46 [RFA][PATCH 0/5] tracing: Ftrace error sync fix and tracepoint warn on failure Steven Rostedt
2014-02-27 15:46 ` [RFA][PATCH 1/5] ftrace/x86: Run a sync after fixup " Steven Rostedt
2014-02-27 15:58 ` Petr Mládek
2014-02-27 16:02 ` Steven Rostedt
2014-03-03 22:12 ` H. Peter Anvin
2014-03-03 22:18 ` Steven Rostedt
2014-03-03 22:27 ` H. Peter Anvin
2014-03-03 22:31 ` Steven Rostedt
2014-02-27 15:46 ` [RFA][PATCH 2/5] ftrace/x86: One more missing sync after fixup of function modification failure Steven Rostedt
2014-02-27 16:05 ` Steven Rostedt
2014-02-27 16:37 ` Frederic Weisbecker
2014-02-27 17:00 ` Steven Rostedt
2014-02-27 17:19 ` Frederic Weisbecker
2014-02-27 17:35 ` Steven Rostedt
2014-02-27 17:52 ` Frederic Weisbecker
2014-02-27 15:46 ` [RFA][PATCH 3/5] tracing: Do not add event files for modules that fail tracepoints Steven Rostedt
2014-02-27 16:31 ` Mathieu Desnoyers
2014-02-27 15:46 ` [RFA][PATCH 4/5] tracepoint: Do not waste memory on mods with no tracepoints Steven Rostedt
2014-02-27 15:46 ` [RFA][PATCH 5/5] tracepoint: Warn and notify if tracepoints are not loaded due to module taint Steven Rostedt
2014-02-27 16:33 ` Mathieu Desnoyers
2014-02-27 17:06 ` Steven Rostedt
2014-02-27 17:09 ` Steven Rostedt
2014-02-27 17:16 ` Mathieu Desnoyers [this message]
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