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Masahiko Sawada bd88404d3c Fix crash with RemoveFromWaitQueue() when detecting a deadlock. 
Commit 5764f611e used dclist_delete_from() to remove the proc from the
wait queue. However, since it doesn't clear dist_node's next/prev to
NULL, it could call RemoveFromWaitQueue() twice: when the process
detects a deadlock and then when cleaning up locks on aborting the
transaction. The waiting lock information is cleared in the first
call, so it led to a crash in the second call.

Backpatch to v16, where the change was introduced.

Bug: #18031
Reported-by: Justin Pryzby, Alexander Lakhin
Reviewed-by: Andres Freund
Discussion: https://postgr.es/m/ZKy4AdrLEfbqrxGJ%40telsasoft.com
Discussion: https://postgr.es/m/18031-ebe2d08cb405f6cc@postgresql.org
Backpatch-through: 16
2023-07-26 14:41:26 +09:00
config All supported systems have locale_t. 2023-07-09 11:55:18 +12:00
contrib Make test_decoding ddl.out shorter 2023-07-24 17:48:06 +02:00
doc pgbench: Use COPY for client-side data generation 2023-07-24 13:48:22 +09:00
src Fix crash with RemoveFromWaitQueue() when detecting a deadlock. 2023-07-26 14:41:26 +09:00
.cirrus.yml cirrus/freebsd: define ENFORCE_REGRESSION_TEST_NAME_RESTRICTIONS 2023-07-03 10:35:48 +02:00
.dir-locals.el
.editorconfig Add .editorconfig 2019-12-18 09:13:13 +01:00
.git-blame-ignore-revs Add b334612b8 to .git-blame-ignore-revs. 2023-06-20 09:52:52 -04:00
.gitattributes gitattributes: Ignore imported pg_bsd_indent code for whitespace checks 2023-02-22 09:00:28 +01:00
.gitignore Update top-level .gitignore. 2022-12-04 15:23:00 -05:00
aclocal.m4 autoconf: Move export_dynamic determination to configure 2022-12-06 18:55:28 -08:00
configure Remove --disable-thread-safety and related code. 2023-07-12 08:20:43 +12:00
configure.ac Remove --disable-thread-safety and related code. 2023-07-12 08:20:43 +12:00
COPYRIGHT Update copyright for 2023 2023-01-02 15:00:37 -05:00
GNUmakefile.in Integrate pg_bsd_indent into our build/test infrastructure. 2023-02-12 12:22:21 -05:00
HISTORY Canonicalize some URLs 2020-02-10 20:47:50 +01:00
Makefile Dynamically find correct installation docs in Makefile. 2022-01-19 14:48:25 +01:00
meson_options.txt meson: Attach colon to keyword argument 2023-06-29 12:53:41 +02:00
meson.build meson: Tie adding C++ support to the llvm Meson option 2023-07-12 16:26:02 -07:00
README Canonicalize some URLs 2020-02-10 20:47:50 +01:00
README.git Canonicalize some URLs 2020-02-10 20:47:50 +01:00

README 

PostgreSQL Database Management System
=====================================

This directory contains the source code distribution of the PostgreSQL
database management system.

PostgreSQL is an advanced object-relational database management system
that supports an extended subset of the SQL standard, including
transactions, foreign keys, subqueries, triggers, user-defined types
and functions.  This distribution also contains C language bindings.

PostgreSQL has many language interfaces, many of which are listed here:

	https://www.postgresql.org/download/

See the file INSTALL for instructions on how to build and install
PostgreSQL.  That file also lists supported operating systems and
hardware platforms and contains information regarding any other
software packages that are required to build or run the PostgreSQL
system.  Copyright and license information can be found in the
file COPYRIGHT.  A comprehensive documentation set is included in this
distribution; it can be read as described in the installation
instructions.

The latest version of this software may be obtained at
https://www.postgresql.org/download/.  For more information look at our
web site located at https://www.postgresql.org/.