On Sun, 4 Dec 2016 20:55:37 -0800, Guenter Roeck wrote: > Writes into temperature and voltage limit attributes can overflow > due to multiplications with unchecked parameters. Also, the input > parameter to DIV_ROUND_CLOSEST() needis to be range checked. > > Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx> > --- > drivers/hwmon/emc6w201.c | 9 +++++---- > 1 file changed, 5 insertions(+), 4 deletions(-) > > diff --git a/drivers/hwmon/emc6w201.c b/drivers/hwmon/emc6w201.c > index f37fe2011640..f8c776c49df9 100644 > --- a/drivers/hwmon/emc6w201.c > +++ b/drivers/hwmon/emc6w201.c > @@ -215,12 +215,13 @@ static ssize_t set_in(struct device *dev, struct device_attribute *devattr, > if (err < 0) > return err; > > - val = DIV_ROUND_CLOSEST(val * 0xC0, nominal_mv[nr]); > + val = DIV_ROUND_CLOSEST(clamp_val(val, 0, 255 * nominal_mv[nr] / 192) > + * 192, nominal_mv[nr]); > reg = (sf == min) ? EMC6W201_REG_IN_LOW(nr) > : EMC6W201_REG_IN_HIGH(nr); > > mutex_lock(&data->update_lock); > - data->in[sf][nr] = clamp_val(val, 0, 255); > + data->in[sf][nr] = val; > err = emc6w201_write8(client, reg, data->in[sf][nr]); > mutex_unlock(&data->update_lock); > > @@ -252,12 +253,12 @@ static ssize_t set_temp(struct device *dev, struct device_attribute *devattr, > if (err < 0) > return err; > > - val = DIV_ROUND_CLOSEST(val, 1000); > + val = DIV_ROUND_CLOSEST(clamp_val(val, -127000, 127000), 1000); > reg = (sf == min) ? EMC6W201_REG_TEMP_LOW(nr) > : EMC6W201_REG_TEMP_HIGH(nr); > > mutex_lock(&data->update_lock); > - data->temp[sf][nr] = clamp_val(val, -127, 127); > + data->temp[sf][nr] = val; > err = emc6w201_write8(client, reg, data->temp[sf][nr]); > mutex_unlock(&data->update_lock); > Keep on separate lines? Other than this, looks good: 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
