John Naylor 176dffdf7d Fix various instances of undefined behavior ...

Mostly this involves checking for NULL pointer before doing operations
that add a non-zero offset.

The exception is an overflow warning in heap_fetch_toast_slice(). This
was caused by unneeded parentheses forcing an expression to be
evaluated to a negative integer, which then got cast to size_t.

Per clang 21 undefined behavior sanitizer.

Backpatch to all supported versions.

Co-authored-by: Alexander Lakhin <exclusion@gmail.com>
Reported-by: Alexander Lakhin <exclusion@gmail.com>
Discussion: https://postgr.es/m/777bd201-6e3a-4da0-a922-4ea9de46a3ee@gmail.com
Backpatch-through: 14

2026-02-04 18:09:35 +07:00

..

data

Add files forgotten in f576b17cd6ba653bdace1f0da9a3b57f4984e460

2016-03-16 19:23:41 +03:00

expected

Force standard_conforming_strings to always be ON.

2026-01-21 15:08:38 -05:00

sql

Force standard_conforming_strings to always be ON.

2026-01-21 15:08:38 -05:00

.gitignore

Support "make check" in contrib

2011-04-25 22:27:11 +03:00

Makefile

Handle equality operator in contrib/pg_trgm

2020-11-15 08:52:35 +03:00

meson.build

Update copyright for 2026

2026-01-01 13:24:10 -05:00

pg_trgm--1.0--1.1.sql

Fix typo in update scripts for some contrib modules.

2013-07-19 04:13:01 +09:00

pg_trgm--1.1--1.2.sql

Add word_similarity to pg_trgm contrib module.

2016-03-16 18:59:21 +03:00

pg_trgm--1.2--1.3.sql

Make contrib modules' installation scripts more secure.

2020-08-10 10:44:42 -04:00

pg_trgm--1.3--1.4.sql

Add strict_word_similarity to pg_trgm module

2018-03-21 14:57:42 +03:00

pg_trgm--1.3.sql

Remove support for upgrading extensions from "unpackaged" state.

2020-02-19 16:59:14 -05:00

pg_trgm--1.4--1.5.sql

Fix typo in contrib/pg_trgm/pg_trgm--1.4--1.5.sql

2020-11-12 08:55:09 +03:00

pg_trgm--1.5--1.6.sql

Handle equality operator in contrib/pg_trgm

2020-11-15 08:52:35 +03:00

pg_trgm.control

Handle equality operator in contrib/pg_trgm

2020-11-15 08:52:35 +03:00

trgm_gin.c

Mark commented out code as unused

2026-01-22 12:44:07 +01:00

trgm_gist.c

Fix various instances of undefined behavior

2026-02-04 18:09:35 +07:00

trgm_op.c

Use palloc_object() and palloc_array(), the last change

2025-12-11 14:29:12 +09:00

trgm_regexp.c

Update copyright for 2026

2026-01-01 13:24:10 -05:00

trgm.h

Fix an issue with index scan using pg_trgm due to char signedness on different architectures.

2025-02-21 10:27:39 -08:00