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

[Viresh Kumar <viresh.kumar@linaro.org>]

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>

-- 
viresh