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hwmon: (pmbus) Fix krealloc() misuse in pmbus_add_attribute()

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If krealloc() returns NULL, it *doesn't* free the original. So any code
of the form 'foo = krealloc(foo, …);' is almost certainly a bug.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
David Woodhouse 2013-03-14 13:30:20 +00:00 committed by Guenter Roeck
parent df069079c1
commit 6975404fb9
1 changed files with 7 additions and 5 deletions
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12
drivers/hwmon/pmbus/pmbus_core.c
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@ -766,12 +766,14 @@ static ssize_t pmbus_show_label(struct device *dev,
static int pmbus_add_attribute(struct pmbus_data *data, struct attribute *attr)
{
if (data->num_attributes >= data->max_attributes - 1) {
data->max_attributes += PMBUS_ATTR_ALLOC_SIZE;
data->group.attrs = krealloc(data->group.attrs,
sizeof(struct attribute *) *
data->max_attributes, GFP_KERNEL);
if (data->group.attrs == NULL)
int new_max_attrs = data->max_attributes + PMBUS_ATTR_ALLOC_SIZE;
void *new_attrs = krealloc(data->group.attrs,
new_max_attrs * sizeof(void *),
GFP_KERNEL);
if (!new_attrs)
return -ENOMEM;
data->group.attrs = new_attrs;
data->max_attributes = new_max_attrs;
}
data->group.attrs[data->num_attributes++] = attr;