linux-kernel - Re: [PATCH] hwmon: coretemp: fix oops on cpu unplug

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Message-ID: <20120501152014.GA2629@ericsson.com>
Date:	Tue, 1 May 2012 08:20:14 -0700
From:	Guenter Roeck <guenter.roeck@...csson.com>
To:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
CC:	Fenghua Yu <fenghua.yu@...el.com>, Andi Kleen <ak@...ux.intel.com>,
	Jean Delvare <khali@...ux-fr.org>,
	"lm-sensors@...sensors.org" <lm-sensors@...sensors.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] hwmon: coretemp: fix oops on cpu unplug

On Mon, Apr 30, 2012 at 09:18:01AM -0400, Kirill A. Shutemov wrote:
> From: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
> 
> coretemp tries to access core_data array beyond bounds on cpu unplug if
> core id of the cpu if more than NUM_REAL_CORES-1.
> 
[ ... ]
> 
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>

Looking at it again, you were right. Adding the check to get_core_online()
doesn't really help as the platform device is per CPU, not per core.

Applied. I'll submit a separate patch to increase NUM_REAL_CORES.

Guenter
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