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| author | Guenter Roeck <linux@roeck-us.net> | 2016-12-03 11:09:55 -0800 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2016-12-09 21:54:31 -0800 |
| commit | b94793b4da1011f24321e2ecc5e173a7198358a5 (patch) | |
| tree | 366f8acd3e355bb0d782038768ab98b6ed5d77a7 /drivers/hwmon/adt7462.c | |
| parent | f1b9baa99bd98f83e8601e5cfd3bd28027a6f5a8 (diff) | |
| download | linux-b94793b4da1011f24321e2ecc5e173a7198358a5.tar.gz linux-b94793b4da1011f24321e2ecc5e173a7198358a5.tar.bz2 linux-b94793b4da1011f24321e2ecc5e173a7198358a5.zip | |
hwmon: (adt7462) Fix overflows seen when writing into limit attributes
Fix overflows seen when writing large values into temperature limit,
voltage limit, and pwm hysteresis attributes.
The input parameter to DIV_ROUND_CLOSEST() needs to be clamped to avoid
such overflows.
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon/adt7462.c')
| -rw-r--r-- | drivers/hwmon/adt7462.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/hwmon/adt7462.c b/drivers/hwmon/adt7462.c index 5929e126da63..19f2a6d48bac 100644 --- a/drivers/hwmon/adt7462.c +++ b/drivers/hwmon/adt7462.c @@ -810,8 +810,8 @@ static ssize_t set_temp_min(struct device *dev, if (kstrtol(buf, 10, &temp) || !temp_enabled(data, attr->index)) return -EINVAL; + temp = clamp_val(temp, -64000, 191000); temp = DIV_ROUND_CLOSEST(temp, 1000) + 64; - temp = clamp_val(temp, 0, 255); mutex_lock(&data->lock); data->temp_min[attr->index] = temp; @@ -848,8 +848,8 @@ static ssize_t set_temp_max(struct device *dev, if (kstrtol(buf, 10, &temp) || !temp_enabled(data, attr->index)) return -EINVAL; + temp = clamp_val(temp, -64000, 191000); temp = DIV_ROUND_CLOSEST(temp, 1000) + 64; - temp = clamp_val(temp, 0, 255); mutex_lock(&data->lock); data->temp_max[attr->index] = temp; @@ -912,9 +912,9 @@ static ssize_t set_volt_max(struct device *dev, if (kstrtol(buf, 10, &temp) || !x) return -EINVAL; + temp = clamp_val(temp, 0, 255 * x / 1000); temp *= 1000; /* convert mV to uV */ temp = DIV_ROUND_CLOSEST(temp, x); - temp = clamp_val(temp, 0, 255); mutex_lock(&data->lock); data->volt_max[attr->index] = temp; @@ -954,9 +954,9 @@ static ssize_t set_volt_min(struct device *dev, if (kstrtol(buf, 10, &temp) || !x) return -EINVAL; + temp = clamp_val(temp, 0, 255 * x / 1000); temp *= 1000; /* convert mV to uV */ temp = DIV_ROUND_CLOSEST(temp, x); - temp = clamp_val(temp, 0, 255); mutex_lock(&data->lock); data->volt_min[attr->index] = temp; @@ -1220,8 +1220,8 @@ static ssize_t set_pwm_hyst(struct device *dev, if (kstrtol(buf, 10, &temp)) return -EINVAL; + temp = clamp_val(temp, 0, 15000); temp = DIV_ROUND_CLOSEST(temp, 1000); - temp = clamp_val(temp, 0, 15); /* package things up */ temp &= ADT7462_PWM_HYST_MASK; @@ -1306,8 +1306,8 @@ static ssize_t set_pwm_tmin(struct device *dev, if (kstrtol(buf, 10, &temp)) return -EINVAL; + temp = clamp_val(temp, -64000, 191000); temp = DIV_ROUND_CLOSEST(temp, 1000) + 64; - temp = clamp_val(temp, 0, 255); mutex_lock(&data->lock); data->pwm_tmin[attr->index] = temp; |