Re: wrong query results on bf leafhopper

From: Robins Tharakan <tharakan(at)gmail(dot)com>
To: Andres Freund <andres(at)anarazel(dot)de>
Cc: pgsql-hackers(at)postgresql(dot)org, David Rowley <dgrowleyml(at)gmail(dot)com>, Alena Rybakina <a(dot)rybakina(at)postgrespro(dot)ru>
Subject: Re: wrong query results on bf leafhopper
Date: 2025-05-19 03:19:26
Message-ID: CAEP4nAy7dRwS3EkvzgbQp5cL-sp0tnvPgyQOmNqQzHmpaRfjGw@mail.gmail.com
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Hi Andres,

On Fri, 16 May 2025 at 22:49, Andres Freund <andres(at)anarazel(dot)de> wrote:
>
> There have been other odd things on leafhopper, see e.g.:
>
https://www.postgresql.org/message-id/35d87371-f3ab-42c8-9aac-bb39ab5bd987%40gmail.com
> https://postgr.es/m/Z4npAKvchWzKfb_r%40paquier.xyz
>

Any chances this could be linked to the openssl bug [2] highlighted
in this other hacker thread [1]? The postgres issue is quite unrelated,
but the openssl bug seems non-trivial and may be good to rule out.

To confirm, leafhopper is on Graviton4, uses openssl v3.2 and is
compiled --with-openssl. I've been unable to triage the recent
leafhopper failures myself and upgrading its openssl (to v3.3+)
has been a pending task (just to rule it out).

[bf(at)ip-172-31-72-114 ~]$ openssl --version
OpenSSL 3.2.2 4 Jun 2024 (Library: OpenSSL 3.2.2 4 Jun 2024)

-
robins

Reference:
1.
https://www.postgresql.org/message-id/6fxlmnyagkycru3bewa4ympknywnsswlqzvwfft3ifqqiioxlv%40ax53pv7xdrc2
2. https://github.com/openssl/openssl/pull/26469

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