Re: [PATCH v2 1/2] mm, kasan: improve double-free detection

[Dmitry Vyukov]

On Mon, May 9, 2016 at 3:01 PM, Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx> wrote:
>
>
> On 05/09/2016 02:35 PM, Luruo, Kuthonuzo wrote:
>>
>> This patch with atomic bit op is similar in spirit to v1 except that it increases metadata size.
>>
>
> I don't think that this is a big deal. That will slightly increase size of objects <= (128 - 32) bytes.
> And if someone think otherwise, we can completely remove 'alloc_size'
> (we use it only to print size in report - not very useful).


Where did 128 come from?
We now should allocate only 32 bytes for 16-byte user object. If not,
there is something to fix.