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| author | Guenter Roeck <linux@roeck-us.net> | 2015-01-19 09:16:53 -0800 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2015-01-25 21:23:59 -0800 |
| commit | e2c26f058e31619b548046b84fe2c2116cb5016f (patch) | |
| tree | 889f1f0e0b4c96ca91eb35972d5afa1131022c19 /drivers/hwmon | |
| parent | 3a05633b042fb4aea65b09ce2d0d43689df6eb9a (diff) | |
| download | linux-e2c26f058e31619b548046b84fe2c2116cb5016f.tar.gz linux-e2c26f058e31619b548046b84fe2c2116cb5016f.tar.bz2 linux-e2c26f058e31619b548046b84fe2c2116cb5016f.zip | |
hwmon: (jc42) Fix integer overflow when writing hysteresis value
Subtracting an unsigned long from a signed value causes an overflow with large
values. Use clamp_val() to reduce the number range prior to subtracting it
from the temperature limit.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/jc42.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/hwmon/jc42.c b/drivers/hwmon/jc42.c index f8e3bbbf019c..a46cb65cacb5 100644 --- a/drivers/hwmon/jc42.c +++ b/drivers/hwmon/jc42.c @@ -312,7 +312,9 @@ static ssize_t set_temp_crit_hyst(struct device *dev, if (kstrtoul(buf, 10, &val) < 0) return -EINVAL; + val = clamp_val(val, 0, JC42_TEMP_MAX); diff = jc42_temp_from_reg(data->temp[t_crit]) - val; + hyst = 0; if (diff > 0) { if (diff < 2250) |