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| author | Guenter Roeck <linux@roeck-us.net> | 2024-07-07 09:43:04 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-09-12 12:03:54 +0300 |
| commit | 7645d783df23878342d5d8d22030c3861d2d5426 (patch) | |
| tree | c7b00602d95fd8ecf60c89abcdf5f6b8c9f5071a | |
| parent | c4c681999d385e28f84808bbf3a85ea8e982da55 (diff) | |
| download | linux-7645d783df23878342d5d8d22030c3861d2d5426.tar.xz | |
hwmon: (adc128d818) Fix underflows seen when writing limit attributes
[ Upstream commit 8cad724c8537fe3e0da8004646abc00290adae40 ]
DIV_ROUND_CLOSEST() after kstrtol() results in an underflow if a large
negative number such as -9223372036854775808 is provided by the user.
Fix it by reordering clamp_val() and DIV_ROUND_CLOSEST() operations.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/hwmon/adc128d818.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/hwmon/adc128d818.c b/drivers/hwmon/adc128d818.c index f9edec195c35..08d8bd72ec0e 100644 --- a/drivers/hwmon/adc128d818.c +++ b/drivers/hwmon/adc128d818.c @@ -176,7 +176,7 @@ static ssize_t adc128_in_store(struct device *dev, mutex_lock(&data->update_lock); /* 10 mV LSB on limit registers */ - regval = clamp_val(DIV_ROUND_CLOSEST(val, 10), 0, 255); + regval = DIV_ROUND_CLOSEST(clamp_val(val, 0, 2550), 10); data->in[index][nr] = regval << 4; reg = index == 1 ? ADC128_REG_IN_MIN(nr) : ADC128_REG_IN_MAX(nr); i2c_smbus_write_byte_data(data->client, reg, regval); @@ -214,7 +214,7 @@ static ssize_t adc128_temp_store(struct device *dev, return err; mutex_lock(&data->update_lock); - regval = clamp_val(DIV_ROUND_CLOSEST(val, 1000), -128, 127); + regval = DIV_ROUND_CLOSEST(clamp_val(val, -128000, 127000), 1000); data->temp[index] = regval << 1; i2c_smbus_write_byte_data(data->client, index == 1 ? ADC128_REG_TEMP_MAX |