pgpool: Fix possible integer overflow.

From: Tatsuo Ishii <ishii(at)postgresql(dot)org>
To: pgpool-committers(at)lists(dot)postgresql(dot)org
Subject: pgpool: Fix possible integer overflow.
Date: 2025-12-23 06:15:35
Message-ID: E1vXvgF-007mC6-24@gothos.postgresql.org
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Fix possible integer overflow.

In pool_write_flush() and pool_flus_it() write(2) is used. write(2)
returns ssize_t and in the code there are some places where the return
value was assigned to an int variable. As a result it was possible
that the return value was evaluated to negative value, which led to an
error.

Backpatch-through: v4.3

Branch
------
master

Details
-------
https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=4990d8bc9a4f9e240828fab19ee233ebfbc180d8

Modified Files
--------------
src/utils/pool_stream.c | 49 +++++++++++++++++++++++--------------------------
1 file changed, 23 insertions(+), 26 deletions(-)

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