John Naylor 6b81a1c7c9 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 17:59:18 +07:00

..

access

Fix various instances of undefined behavior

2026-02-04 17:59:18 +07:00

backup

Fix error message related to end TLI in backup manifest

2026-01-18 17:25:03 +09:00

bootstrap

Process session_preload_libraries within InitPostgres's transaction.

2022-07-25 10:27:43 -04:00

catalog

For inplace update, send nontransactional invalidations.

2025-12-16 16:13:55 -08:00

commands

Fix trigger transition table capture for MERGE in CTE queries.

2026-01-24 11:30:51 +00:00

executor

Fix bogus ctid requirement for dummy-root partitioned targets

2026-01-23 10:23:14 +09:00

foreign

Restrict accesses to non-system views and foreign tables during pg_dump.

2024-08-05 06:05:25 -07:00

jit

jit: Add missing inline pass for LLVM >= 17.

2026-01-22 16:09:29 +13:00

lib

Accommodate very large dshash tables.

2024-12-17 15:24:45 -06:00

libpq

Fix build breakage on Solaris-alikes with late-model GCC.

2025-07-23 15:44:29 -04:00

main

Fix elog(FATAL) before PostmasterMain() or just after fork().

2024-12-10 13:52:02 -08:00

nodes

Build whole-row Vars the same way during parsing and planning.

2025-03-12 11:47:19 -04:00

optimizer

Allow indexscans on partial hash indexes with implied quals.

2025-11-27 13:09:59 -05:00

parser

Fix possible incorrect column reference in ERROR message

2026-01-09 11:04:12 +13:00

partitioning

Fix creation of partition descriptor during concurrent detach+drop

2024-08-12 18:17:56 -04:00

po

Translation updates

2025-11-10 13:05:20 +01:00

port

Don't treat EINVAL from semget() as a hard failure.

2025-08-13 11:59:47 -04:00

postmaster

Fix snapshot handling bug in recent BRIN fix

2025-11-04 20:31:43 +01:00

regex

Fix recently-exposed portability issue in regex optimization.

2024-11-17 14:14:06 -05:00

replication

Prevent invalidation of newly created replication slots.

2026-01-08 06:54:52 +00:00

rewrite

Avoid rewriting data-modifying CTEs more than once.

2025-11-29 12:33:35 +00:00

snowball

Avoid null pointer dereference crash after OOM in Snowball stemmers.

2025-02-18 21:23:59 -05:00

statistics

Fix security checks in selectivity estimation functions.

2025-08-11 09:11:02 +01:00

storage

Fix segfault from releasing locks in detached DSM segments

2026-01-16 13:20:05 +09:00

tcop

Check for CREATE privilege on the schema in CREATE STATISTICS.

2025-11-10 09:00:00 -06:00

tsearch

Clear errno before calling strtol() in spell.c.

2025-03-08 11:24:52 -05:00

utils

Fix various instances of undefined behavior

2026-02-04 17:59:18 +07:00

.gitignore

…

common.mk

…

Makefile

Move basebackup code to new directory src/backend/backup

2022-08-10 14:03:09 -04:00

nls.mk

Translation updates

2023-11-06 13:16:22 +01:00