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hwmon: (nct6775-core) Fix underflows seen when writing limit attributes

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[ Upstream commit 0403e10bf0824bf0ec2bb135d4cf1c0cc3bf4bf0 ]

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>
This commit is contained in:
Guenter Roeck
2024-07-06 23:50:08 -07:00
committed by Greg Kroah-Hartman
parent da765bebd9
commit 0c23e18cef
1 changed files with 1 additions and 1 deletions
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2
drivers/hwmon/nct6775-core.c
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@@ -2171,7 +2171,7 @@ store_temp_offset(struct device *dev, struct device_attribute *attr,
if (err < 0)
return err;
val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), -128, 127);
val = DIV_ROUND_CLOSEST(clamp_val(val, -128000, 127000), 1000);
mutex_lock(&data->update_lock);
data->temp_offset[nr] = val;