On Sun, 4 Dec 2016 20:55:31 -0800, Guenter Roeck wrote: > Fix overflows seen when writing large values into various temperature limit > attributes. > > The input value passed to DIC_ROUND_CLOSEST() needs to be clamped to avoid > such overflows. > > Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx> > --- > drivers/hwmon/adt7470.c | 9 +++------ > 1 file changed, 3 insertions(+), 6 deletions(-) > > diff --git a/drivers/hwmon/adt7470.c b/drivers/hwmon/adt7470.c > index 6e60ca53406e..8996120b8170 100644 > --- a/drivers/hwmon/adt7470.c > +++ b/drivers/hwmon/adt7470.c > @@ -483,8 +483,7 @@ static ssize_t set_temp_min(struct device *dev, > if (kstrtol(buf, 10, &temp)) > return -EINVAL; > > - temp = DIV_ROUND_CLOSEST(temp, 1000); > - temp = clamp_val(temp, -128, 127); > + temp = DIV_ROUND_CLOSEST(clamp_val(temp, -128000, 127000), 1000); > > mutex_lock(&data->lock); > data->temp_min[attr->index] = temp; > @@ -517,8 +516,7 @@ static ssize_t set_temp_max(struct device *dev, > if (kstrtol(buf, 10, &temp)) > return -EINVAL; > > - temp = DIV_ROUND_CLOSEST(temp, 1000); > - temp = clamp_val(temp, -128, 127); > + temp = DIV_ROUND_CLOSEST(clamp_val(temp, -128000, 127000), 1000); > > mutex_lock(&data->lock); > data->temp_max[attr->index] = temp; > @@ -880,8 +878,7 @@ static ssize_t set_pwm_tmin(struct device *dev, > if (kstrtol(buf, 10, &temp)) > return -EINVAL; > > - temp = DIV_ROUND_CLOSEST(temp, 1000); > - temp = clamp_val(temp, -128, 127); > + temp = DIV_ROUND_CLOSEST(clamp_val(temp, -128000, 127000), 1000); > > mutex_lock(&data->lock); > data->pwm_tmin[attr->index] = temp; Seems more readable on 2 lines, but other than this: Reviewed-by: Jean Delvare <jdelvare@xxxxxxx> -- Jean Delvare SUSE L3 Support -- To unsubscribe from this list: send the line "unsubscribe linux-hwmon" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
