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Message-ID: <20240801002107.3934037-79-sashal@kernel.org> Date: Wed, 31 Jul 2024 20:18:34 -0400 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Guenter Roeck <linux@...ck-us.net>, Sasha Levin <sashal@...nel.org>, jdelvare@...e.com, linux-hwmon@...r.kernel.org Subject: [PATCH AUTOSEL 6.6 79/83] hwmon: (nct6775-core) Fix underflows seen when writing limit attributes From: Guenter Roeck <linux@...ck-us.net> [ 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@...ck-us.net> Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/hwmon/nct6775-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/hwmon/nct6775-core.c b/drivers/hwmon/nct6775-core.c index f3bf2e4701c38..8da7aa1614d7d 100644 --- a/drivers/hwmon/nct6775-core.c +++ b/drivers/hwmon/nct6775-core.c @@ -2262,7 +2262,7 @@ 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; -- 2.43.0
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