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help / color / mirror / Atom feedFrom: Noah Misch <noah@leadboat.com>
To: pgsql-committers@lists.postgresql.org
Subject: pgsql: Add pg_add_size_overflow() and friends
Date: Mon, 11 May 2026 12:19:40 +0000
Message-ID: <E1wMPbo-0002eX-1v@gemulon.postgresql.org> (raw)
Add pg_add_size_overflow() and friends
Commit 600086f47 added (several bespoke copies of) size_t addition with
overflow checks to libpq. Move this to common/int.h, along with
its subtraction and multiplication counterparts.
pg_neg_size_overflow() is intentionally omitted; I'm not sure we should
add SSIZE_MAX to win32_port.h for the sake of a function with no
callers.
Back-patch of commit 8934f2136, done now because pg_add_size_overflow()
and friends are needed more widely for security fixes.
Author: Jacob Champion <jacob.champion@enterprisedb.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://postgr.es/m/CAOYmi%2B%3D%2BpqUd2MUitvgW1pAJuXgG_TKCVc3_Ek7pe8z9nkf%2BAg%40mail.gmail.com
Backpatch-through: 14-18
Security: CVE-2026-6473
Branch
------
REL_14_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/37842f3dc6c2da8eb71816698e99391a0e0d4441
Author: Tom Lane <tgl@sss.pgh.pa.us>
Modified Files
--------------
src/include/common/int.h | 67 +++++++++++++++++++++++++++++++++++++
src/interfaces/libpq/fe-exec.c | 44 +++++++-----------------
src/interfaces/libpq/fe-print.c | 36 +++++---------------
src/interfaces/libpq/fe-protocol3.c | 27 +++------------
4 files changed, 91 insertions(+), 83 deletions(-)
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Subject: Re: pgsql: Add pg_add_size_overflow() and friends
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