hwmon: (peci/cputemp) Fix off-by-one in coretemp_label allocation

The find_last_bit() call produces the index of the highest-numbered
core in core_mask; because cores are numbered from zero, the number of
elements we need to allocate is one more than that.
Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
Cc: stable@kernel.org # v5.18
Fixes: bf3608f3 ("hwmon: peci: Add cputemp driver")
Reviewed-by: Iwona Winiarska <iwona.winiarska@intel.com>
Link: https://lore.kernel.org/r/20230202021825.21486-1-zev@bewilderbeest.netSigned-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/peci/cputemp.c

@@ -402,7 +402,7 @@ static int create_temp_label(struct peci_cputemp *priv)
 	unsigned long core_max = find_last_bit(priv->core_mask, CORE_NUMS_MAX);
 	int i;
 
-	priv->coretemp_label = devm_kzalloc(priv->dev, core_max * sizeof(char *), GFP_KERNEL);
+	priv->coretemp_label = devm_kzalloc(priv->dev, (core_max + 1) * sizeof(char *), GFP_KERNEL);
 	if (!priv->coretemp_label)
 		return -ENOMEM;