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help / color / mirror / Atom feedFrom: Jacob Champion <jchampion@postgresql.org>
To: pgsql-committers@lists.postgresql.org
Subject: pgsql: libpq-oauth: Avoid overflow for very large intervals
Date: Fri, 31 Jul 2026 18:27:10 +0000
Message-ID: <E1wprws-0000000182p-22cs@gemulon.postgresql.org> (raw)
libpq-oauth: Avoid overflow for very large intervals
The slow_down interval parsing code checks explicitly for overflow, but
since it does that after the signed overflow has already occurred, we
end up inviting undefined behavior from the compiler anyway.
Use checked arithmetic instead. set_timer() takes a long int in order to
interface nicely with libcurl, so use an int32 as the interval counter
and clamp to LONG_MAX during conversion to milliseconds.
Backpatch to 18, where libpq-oauth was introduced.
Reported-by: Andres Freund <andres@anarazel.de>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Discussion: https://postgr.es/m/qtclihmrkq67ach3xjxyi4qcksstin5qxwsnkqefkmotxwh4g6%40ae2bj6jvcmry
Backpatch-through: 18
Branch
------
REL_19_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/19ff9a1ae04087ff324dc2180c757d56258ab89a
Modified Files
--------------
src/interfaces/libpq-oauth/oauth-curl.c | 35 +++++++++++++++++++++++----------
1 file changed, 25 insertions(+), 10 deletions(-)
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To: pgsql-committers@postgresql.org
Cc: jchampion@postgresql.org, pgsql-committers@lists.postgresql.org
Subject: Re: pgsql: libpq-oauth: Avoid overflow for very large intervals
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