linux-kernel - Re: suspicious RCU usage (perf)

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Message-ID: <20130827121629.GE10002@twins.programming.kicks-ass.net>
Date:	Tue, 27 Aug 2013 14:16:29 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Dave Jones <davej@...hat.com>, paulmck@...ux.vnet.ibm.com,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...nel.org>, Jiri Olsa <jolsa@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: suspicious RCU usage (perf)

On Mon, Aug 26, 2013 at 03:03:04PM -0400, Steven Rostedt wrote:
> > Is there some path through sys_perf_open_event that might be
> > missing a capability check perhaps ?
> > 
> 
> That's a question for Ingo, Peter or Jiri.

Its not something I've looked at recently, git blames Jiri and fweisbec
for most of that code.

Permission checks appear to live in
kernel/trace/trace_event_perf.c:perf_trace_event_perm().
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