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Message-ID: <CANdKZ0fRckMSUwHyChgBw162cVQe9_mnd_G9vwt=+CV+Y0WFfw@mail.gmail.com>
Date: Wed, 30 Jan 2019 14:04:40 +0800
From: Peter Shih <pihsun@...omium.org>
To: unlisted-recipients:; (no To-header on input)
Cc: Zhang Rui <rui.zhang@...el.com>,
Eduardo Valentin <edubezval@...il.com>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Matthias Brugger <matthias.bgg@...il.com>,
"open list:THERMAL" <linux-pm@...r.kernel.org>,
"moderated list:ARM/Mediatek SoC support"
<linux-arm-kernel@...ts.infradead.org>,
"moderated list:ARM/Mediatek SoC support"
<linux-mediatek@...ts.infradead.org>,
open list <linux-kernel@...r.kernel.org>,
Michael.Kao@...iatek.com
Subject: Re: [PATCH] thermal: mtk: Allocate enough space for mtk_thermal.
Adding Michael Kao to cc list.
On Wed, Jan 9, 2019 at 1:57 PM Pi-Hsun Shih <pihsun@...omium.org> wrote:
>
> The mtk_thermal struct contains a 'struct mtk_thermal_bank banks[];',
> but the allocation only allocates sizeof(struct mtk_thermal) bytes,
> which cause out of bound access with the ->banks[] member. Change it to
> a fixed size array instead.
>
> Signed-off-by: Pi-Hsun Shih <pihsun@...omium.org>
> ---
> drivers/thermal/mtk_thermal.c | 7 +++++--
> 1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/thermal/mtk_thermal.c b/drivers/thermal/mtk_thermal.c
> index 0691f260f6eabe..ea11edb3fcced6 100644
> --- a/drivers/thermal/mtk_thermal.c
> +++ b/drivers/thermal/mtk_thermal.c
> @@ -159,6 +159,9 @@
> #define MT7622_NUM_SENSORS_PER_ZONE 1
> #define MT7622_TS1 0
>
> +/* The maximum number of banks */
> +#define MAX_NUM_ZONES 8
> +
> struct mtk_thermal;
>
> struct thermal_bank_cfg {
> @@ -178,7 +181,7 @@ struct mtk_thermal_data {
> const int *sensor_mux_values;
> const int *msr;
> const int *adcpnp;
> - struct thermal_bank_cfg bank_data[];
> + struct thermal_bank_cfg bank_data[MAX_NUM_ZONES];
> };
>
> struct mtk_thermal {
> @@ -197,7 +200,7 @@ struct mtk_thermal {
> s32 vts[MT8173_NUM_SENSORS];
>
> const struct mtk_thermal_data *conf;
> - struct mtk_thermal_bank banks[];
> + struct mtk_thermal_bank banks[MAX_NUM_ZONES];
> };
>
> /* MT8173 thermal sensor data */
> --
> 2.20.1.97.g81188d93c3-goog
>
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