Re: Memory leak in pg_stat_statements when qtext file contains invalid encoding

From: Lukas Fittl <lukas(at)fittl(dot)com>
To: Heikki Linnakangas <hlinnaka(at)iki(dot)fi>
Cc: Daniel Gustafsson <daniel(at)yesql(dot)se>, Gaurav Singh <gaurav(dot)singh(at)yugabyte(dot)com>, pgsql-bugs(at)lists(dot)postgresql(dot)org
Subject: Re: Memory leak in pg_stat_statements when qtext file contains invalid encoding
Date: 2026-03-27 15:25:47
Message-ID: CAP53PkwciXaP2TQLjkjLGHD1+HEtBfCcpfd25xCnGbgQErpocA@mail.gmail.com
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On Fri, Mar 27, 2026 at 4:13 AM Heikki Linnakangas <hlinnaka(at)iki(dot)fi> wrote:
>
> On 27/03/2026 11:05, Daniel Gustafsson wrote:
> >> On 27 Mar 2026, at 09:59, Heikki Linnakangas <hlinnaka(at)iki(dot)fi> wrote:
> >
> >> Hmm, perhaps. But there's a simpler, less invasive fix. When that code was written, we didn't have MCXT_ALLOC_HUGE nor MCXT_ALLOC_NO_OOM. Now that we do, we can just use palloc_extended(MCXT_ALLOC_HUGE | MCXT_ALLOC_NO_OOM) instead of raw malloc(). Per attached.
> >
> > LGTM.
>
> Committed, thanks!

Thanks for the quick fix!

TIL about MCXT_ALLOC_NO_OOM, that's useful to know about.

Thanks,
Lukas

--
Lukas Fittl

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