linux-kernel - Re: [PATCH] Prevent crash on missing sysfs attribute group

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Date:	Tue, 03 Apr 2012 16:22:46 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Bruno Prémont <bonbons@...ux-vserver.org>,
	Greg KH <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH] Prevent crash on missing sysfs attribute group

Peter Zijlstra <peterz@...radead.org> writes:

> On Tue, 2012-04-03 at 00:50 -0700, Eric W. Biederman wrote:
>> 
>> So I am asking that since perf is built in a way that actively makes
>> debugging these kinds of problems hard that you please add additional
>> debugging code to perf_pmu_register or some other better location so
>> that simply registering something buggy with perf will show the bug.
>> 
>> 
> Is there a convenient helper function that we can use that validates the
> attribute_group structure? We could use such a function to do the
> validation at a point where we still know where it came from.

There isn't but I was just thinking before you sent this that we could
really use one.

Eric
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