From: Vince Weaver <vincent.weaver@maine.edu>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>,
Vince Weaver <vincent.weaver@maine.edu>,
Steven Rostedt <rostedt@goodmis.org>,
LKML <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@kernel.org>, Dave Jones <davej@redhat.com>
Subject: Re: perf/tracepoint: another fuzzer generated lockup
Date: Thu, 14 Nov 2013 12:20:35 -0500 (EST) [thread overview]
Message-ID: <alpine.DEB.2.10.1311141217470.8746@vincent-weaver-1.um.maine.edu> (raw)
In-Reply-To: <20131114152304.GC5364@laptop.programming.kicks-ass.net>
possibly not an issue with your patch, but found in nearby code:
in perf_trace_init:
int event_id = p_event->attr.config;
...
if (tp_event->event.type == event_id &&
note that "attr.config" is 64-bit but "event_id" is only 32-bit,
so things like 0xffffffff00000018 will map to irq_work_exit.
I'm not sure if your PERM code properly handles this case, I don't have
time to work through the macro-magic in your patch.
Vince
next prev parent reply other threads:[~2013-11-14 17:12 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-08 19:45 perf/tracepoint: another fuzzer generated lockup Vince Weaver
2013-11-08 20:06 ` Vince Weaver
2013-11-08 20:02 ` Frederic Weisbecker
2013-11-08 20:23 ` Vince Weaver
2013-11-08 20:48 ` Frederic Weisbecker
2013-11-08 21:15 ` Vince Weaver
2013-11-08 22:24 ` Frederic Weisbecker
2013-11-08 22:36 ` Frederic Weisbecker
2013-11-09 1:09 ` Steven Rostedt
2013-11-09 14:10 ` Peter Zijlstra
2013-11-09 14:20 ` Frederic Weisbecker
2013-11-11 12:44 ` Ingo Molnar
2013-11-11 15:53 ` Peter Zijlstra
2013-11-11 21:13 ` Ingo Molnar
2013-11-09 14:52 ` Frederic Weisbecker
2013-11-09 15:13 ` Peter Zijlstra
2013-11-09 15:27 ` Frederic Weisbecker
2013-11-09 15:59 ` Peter Zijlstra
2013-11-09 16:08 ` Frederic Weisbecker
2013-11-09 15:11 ` Peter Zijlstra
2013-11-09 15:22 ` Frederic Weisbecker
2013-11-09 15:30 ` Peter Zijlstra
2013-11-14 15:23 ` Peter Zijlstra
2013-11-14 15:33 ` Peter Zijlstra
2013-11-14 15:35 ` Frederic Weisbecker
2013-11-15 1:16 ` Masami Hiramatsu
2013-11-15 12:28 ` Peter Zijlstra
2013-11-15 14:15 ` Steven Rostedt
2013-11-15 14:28 ` Frederic Weisbecker
2013-11-17 7:53 ` Masami Hiramatsu
2013-11-17 9:43 ` Peter Zijlstra
2013-11-14 16:03 ` Frederic Weisbecker
2013-11-14 17:20 ` Vince Weaver [this message]
2013-11-14 17:14 ` Peter Zijlstra
2013-11-14 17:41 ` Steven Rostedt
2013-11-14 19:18 ` Vince Weaver
2013-11-19 19:18 ` [tip:perf/urgent] ftrace, perf: Avoid infinite event generation loop tip-bot for Peter Zijlstra
2013-11-09 0:25 ` perf/tracepoint: another fuzzer generated lockup Frederic Weisbecker
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