On 12/10/2020 19:06, Joe Perches wrote:
> On Mon, 2020-10-12 at 13:51 -0400, Mimi Zohar wrote:
>> On Wed, 2020-10-07 at 11:27 -0700, Joe Perches wrote:
>>> On Wed, 2020-10-07 at 12:02 +0100, Colin King wrote:
>>>> An incorrect sizeof is being used, sizeof(*fields) is not correct,
>>>> it should be sizeof(**fields). This is not causing a problem since
>>>> the size of these is the same. Fix this in the kmalloc_array and
>>>> memcpy calls.
>>> []
>>>> diff --git a/security/integrity/ima/ima_template.c
>>>> b/security/integrity/ima/ima_template.c
>>> []
>>>> @@ -216,11 +216,11 @@ int template_desc_init_fields(const char
>>>> *template_fmt,
>>>> }
>>>>
>>>> if (fields && num_fields) {
>>>> - *fields = kmalloc_array(i, sizeof(*fields), GFP_KERNEL);
>>>> + *fields = kmalloc_array(i, sizeof(**fields), GFP_KERNEL);
>>>> if (*fields == NULL)
>>>> return -ENOMEM;
>>>>
>>>> - memcpy(*fields, found_fields, i * sizeof(*fields));
>>>> + memcpy(*fields, found_fields, i * sizeof(**fields));
>>>
>>> Maybe use kmemdup instead.
>>>
>>> if (fields && num_fields) {
>>> *fields = kmemdup(found_fields, i * sizeof(**fields),
>>> GFP_KERNEL);
>>> etc...
>>>
>>
>> Thanks, Joe. Since this patch will be backported, perhaps it would be
>> better to leave this as a bug fix and upstream other changes
>> independently.
>
> IMO:
>
> This patch doesn't need need backporting as it doesn't
> actually fix anything other than a style defect.
>
> void * and void ** are the same size.
indeed, same size, it's a semantic difference *and* a style fix :-)
Colin
>
> cheers, Joe
>
