Re: Possible memory corruption (src/timezone/zic.c b/src/timezone/zic.c)

Em sex., 14 de mai. de 2021 às 19:52, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> escreveu:

> I wrote:
> > So the question for us is whether it's worth trying to make pgreadlink
> > conform to the letter of the POSIX spec in this detail. TBH, I can't
> > get excited about that, at least not so far as zic's usage is concerned.
>
> Hmmm ... on closer inspection, though, it might not be that hard.
> pgreadlink is already using a fixed-length buffer (with only enough
> room for MAX_PATH WCHARs) for the input of WideCharToMultiByte. So
> it could use a fixed-length buffer of say 4 * MAX_PATH bytes for the
> output, and then transfer just the appropriate amount of data to the
> caller's buffer.
>
Following your directions, maybe something like this will solve?

regards,
Ranier Vilela