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Date:   Wed, 25 Jan 2017 11:45:03 +0100
From:   Greg KH <>
To:     Mathieu Poirier <>
Subject: Re: [PATCH 1/3] coresight: fix kernel panic caused by invalid CPU

On Mon, Jan 23, 2017 at 10:41:22AM -0700, Mathieu Poirier wrote:
> From: Wang Nan <>
> Commit d52c9750f150 ("coresight: reset "enable_sink" flag when need be")
> caused a kernel panic because of the using of an invalid value: after
> 'for_each_cpu(cpu, mask)', value of local variable 'cpu' become invalid,
> causes following 'cpu_to_node' access invalid memory area.

You should add a "Fixes:" tag when you write something like this, as you
have all of the information here. I'll add it, and the stable tag as


greg k-h

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