Re: Fix calloc check if oom (PQcancelCreate)

Ranier Vilela <ranier.vf@gmail.com>

From: Ranier Vilela <ranier.vf@gmail.com>
To: Daniel Gustafsson <daniel@yesql.se>
Cc: PostgreSQL Hackers <pgsql-hackers@postgresql.org>
Date: 2024-05-27T14:06:30Z
Lists: pgsql-hackers

Attachments

Hi Daniel,

Em seg., 27 de mai. de 2024 às 10:23, Daniel Gustafsson <daniel@yesql.se>
escreveu:

> > On 27 May 2024, at 14:25, Ranier Vilela <ranier.vf@gmail.com> wrote:
>
> > I think that commit 61461a3, left some oversight.
> > The function *PQcancelCreate* fails in check,
> > return of *calloc* function.
> >
> > Trivial fix is attached.
>
> Agreed, this looks like a copy/paste from the calloc calls a few lines up.
>
Yeah.


>
> > But, IMO, I think that has more problems.
> > If any allocation fails, all allocations must be cleared.
> > Or is the current behavior acceptable?
>
> Since this is frontend library code I think we should free all the
> allocations
> in case of OOM.
>
Agreed.

With v1 patch, it is handled.

best regards,
Ranier Vilela

Commits

  1. Fix check for memory allocation

  2. libpq: Add encrypted and non-blocking query cancellation routines