Re: [PATCH] thermal: cpu_cooling: fix out of bounds access in time_in_idle

[Javi Merino <javi.merino@arm.com>]

Eduardo, Rui,

On Mon, Dec 21, 2015 at 08:49:40AM +0530, Viresh Kumar wrote:
> On 19-12-15, 12:54, Javi Merino wrote:
> > In __cpufreq_cooling_register() we allocate the arrays for time_in_idle
> > and time_in_idle_timestamp to be as big as the number of cpus in this
> > cpufreq device.  However, in get_load() we access this array using the
> > cpu number as index, which can result in an out of bound access.
> > 
> > Index time_in_idle{,_timestamp} using the index in the cpufreq_device's
> > allowed_cpus mask, as we do for the load_cpu array in
> > cpufreq_get_requested_power()
> > 
> > Reported-by: Nicolas Boichat <drinkcat@chromium.org>
> > Cc: Amit Daniel Kachhap <amit.kachhap@gmail.com>
> > Cc: Viresh Kumar <viresh.kumar@linaro.org>
> > Cc: Zhang Rui <rui.zhang@intel.com>
> > Cc: Eduardo Valentin <edubezval@gmail.com>
> > Signed-off-by: Javi Merino <javi.merino@arm.com>
> > ---
> >  drivers/thermal/cpu_cooling.c | 14 ++++++++------
> >  1 file changed, 8 insertions(+), 6 deletions(-)
> 
> Acked-by: Viresh Kumar <viresh.kumar@linaro.org>

If there are no more objections, can you pick this up?

Thanks,
Javi