Message-ID: <558C6082.90608@oracle.com>
Date: Thu, 25 Jun 2015 16:11:46 -0400
From: Sasha Levin <sasha.levin@oracle.com>
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To: Steven Rostedt <rostedt@goodmis.org>
CC: Linus Torvalds <torvalds@linux-foundation.org>,
        LKML <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Vince Weaver <vincent.weaver@maine.edu>,
        Arnaldo Carvalho de Melo <acme@kernel.org>
Subject: Re: [GIT PULL] tracing: Have filter check for balanced ops
References: <20150617083638.20304e44@gandalf.local.home>	<558B7D76.4020705@oracle.com> <20150625003510.1ea5a750@grimm.local.home>
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On 06/25/2015 12:35 AM, Steven Rostedt wrote:
> On Thu, 25 Jun 2015 00:03:02 -0400
> Sasha Levin <sasha.levin@oracle.com> wrote:
> 
>> On 06/17/2015 08:36 AM, Steven Rostedt wrote:
>>> Linus,
>>>
>>> Vince Weaver reported a warning when he added perf event filters
>>> into his fuzzer tests. There's a missing check of balanced
>>> operations when parenthesis are used, and this triggers a WARN_ON()
>>> and when reading the failure, the filter reports no failure occurred.
>>
>> Hey Steven,
>>
>> My fuzzings are hitting the warning added by this patch:
> 
> Yes, Vince said he was able to hit it as well. But the warning itself
> is useless if you don't supply what filter was used to trigger it.

# echo ">" > events/ext4/ext4_truncate_exit/filter


Thanks,
Sasha
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