[PATCH] stdio: Remove memory leak from multibyte convertion (BZ#25691)

[Adhemerval Zanella]

On 19/03/2020 12:52, Florian Weimer wrote:
> * Adhemerval Zanella via Libc-alpha:
> 
>> Both default and wide printf functions might leak memory when
>> manipulate multibyte characters conversion depending of the size
>> of the input (whether __libc_use_alloca trigger or not the fallback
>> heap allocation).
>>
>> This patch fixes it by issuing the required memory free operation
>> and also change the alloca/malloc strategy to a scratch buffer.
>>
>> The testcase uses input argument size that trigger memory leaks
>> on unpatched code, using a scratch buffer the threashold to use
>> heap allocation is lower.
> 
> Should we remove the malloc altogether?
> 
> I think we already have patches for that.
> 

Which malloc exactly (there are still some in printf) and which 
patches are you referring ?