linux-kernel - Re: [PATCH] PM / devfreq: Fix out of bounds access of transition table array

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Date:	Tue, 25 Feb 2014 13:13:56 -0800
From:	Saravana Kannan <skannan@...eaurora.org>
To:	Saravana Kannan <skannan@...eaurora.org>
CC:	MyungJoo Ham <myungjoo.ham@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-msm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] PM / devfreq: Fix out of bounds access of transition
 table array

On 02/23/2014 11:15 PM, Saravana Kannan wrote:
> The previous_freq value for a device could be an invalid frequency that
> results in a error value being returned from devfreq_get_freq_level().
> Check for an error value before using that to index into the transition
> table.
>
> Not doing this check will result in memory corruption when previous_freq is
> not a valid frequency.
>
> Signed-off-by: Saravana Kannan <skannan@...eaurora.org>

MyungJoo/Kyungmin,

Would either of you have some time to respond to this?

Thanks,
Saravana


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