From: Andres Freund <andres@anarazel.de>
To: pgsql-committers@lists.postgresql.org
Subject: pgsql: Add pg_encoding_set_invalid()
Date: Mon, 10 Feb 2025 15:09:48 +0000
Message-ID: <E1thVPw-006Nxb-L2@gemulon.postgresql.org> (raw)
Add pg_encoding_set_invalid()
There are cases where we cannot / do not want to error out for invalidly
encoded input. In such cases it can be useful to replace e.g. an incomplete
multi-byte characters with bytes that will trigger an error when getting
validated as part of a larger string.
Unfortunately, until now, for some encoding no such sequence existed. For
those encodings this commit removes one previously accepted input combination
- we consider that to be ok, as the chosen bytes are outside of the valid
ranges for the encodings, we just previously failed to detect that.
As we cannot add a new field to pg_wchar_table without breaking ABI, this is
implemented "in-line" in the newly added function.
Author: Noah Misch <noah@leadboat.com>
Reviewed-by: Andres Freund <andres@anarazel.de>
Backpatch-through: 13
Security: CVE-2025-1094
Branch
------
REL_17_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/7d43ca6fe068015b403ffa1762f4df4efdf68b69
Modified Files
--------------
src/common/wchar.c | 55 +++++++++++++++++++++++++++++++-
src/include/mb/pg_wchar.h | 1 +
src/test/regress/expected/conversion.out | 7 ++++
src/test/regress/regress.c | 50 +++++++++++++++++++++++++++++
src/test/regress/sql/conversion.sql | 5 +++
5 files changed, 117 insertions(+), 1 deletion(-)
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To: pgsql-committers@postgresql.org
Cc: andres@anarazel.de, pgsql-committers@lists.postgresql.org
Subject: Re: pgsql: Add pg_encoding_set_invalid()
In-Reply-To: <E1thVPw-006Nxb-L2@gemulon.postgresql.org>
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