linux-kernel - Re: [PATCH v3] oprofile, x86: Convert memory allocation to static array

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Message-ID: <20110801214130.GF27083@one.firstfloor.org>
Date:	Mon, 1 Aug 2011 23:41:30 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Robert Richter <robert.richter@....com>
Cc:	Maarten Lankhorst <m.b.lankhorst@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Thomas Gleixner <tglx@...utronix.de>,
	"x86@...nel.org" <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andi Kleen <andi@...stfloor.org>
Subject: Re: [PATCH v3] oprofile, x86: Convert memory allocation to static array

On Mon, Aug 01, 2011 at 11:31:42PM +0200, Robert Richter wrote:
> On 01.08.11 11:08:59, Maarten Lankhorst wrote:
> > On -rt, allocators don't work from atomic context any more,
> > and the maximum size of the array is known at compile time.
> > 
> > Signed-off-by: Maarten Lankhorst <m.b.lankhorst@...il.com>
> 
> Applied to oprofile/core. Thanks, Maarten.

And what happens when the CPU reports more than 32 counters?
You have a silent buffer overflow then.

Besides I bet there are other cases like this all over the tree.

And the whole thing is tasteless. 

Nacked-by: Andi Kleen <ak@...ux.intel.com>

-Andi

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