linux-kernel - Re: powerpc/cell/oprofile: avoid double free of profile buffer

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Message-ID: <20080819115317.GD1488@erda.amd.com>
Date:	Tue, 19 Aug 2008 13:53:18 +0200
From:	Robert Richter <robert.richter@....com>
To:	Arnd Bergmann <arnd@...db.de>
CC:	linuxppc-dev@...abs.org, cbe-oss-dev@...abs.org,
	linux-kernel <linux-kernel@...r.kernel.org>,
	oprofile-list@...ts.sourceforge.net,
	Paul Mackerras <paulus@...ba.org>, cel <cel@...ux.vnet.ibm.com>
Subject: Re: powerpc/cell/oprofile: avoid double free of profile buffer

On 11.08.08 09:25:43, Arnd Bergmann wrote:
> From: Carl Love <cel@...ibm.com>
> 
> If an error occurs on opcontrol start, the event and per cpu buffers
> are released.  If later opcontrol shutdown is called then the free
> function will be called again to free buffers that no longer
> exist.  This results in a kernel oops.  The following changes
> prevent the call to delete buffers that don't exist.
> 
> Signed-off-by: Carl Love <carll@...ibm.com>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Acked-by: Robert Richter <robert.richter@....com>

-Robert

-- 
Advanced Micro Devices, Inc.
Operating System Research Center
email: robert.richter@....com

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