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bde2f1847f
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Thomas Munro bde2f1847f Fix edge-case for xl_tot_len broken by bae868ca. 
bae868ca removed a check that was still needed.  If you had an
xl_tot_len at the end of a page that was too small for a record header,
but not big enough to span onto the next page, we'd immediately perform
the CRC check using a bogus large length.  Because of arbitrary coding
differences between the CRC implementations on different platforms,
nothing very bad happened on common modern systems.  On systems using
the _sb8.c fallback we could segfault.

Restore that check, add a new assertion and supply a test for that case.
Back-patch to 12, like bae868ca.

Tested-by: Tom Lane <tgl@sss.pgh.pa.us>
Tested-by: Alexander Lakhin <exclusion@gmail.com>
Discussion: https://postgr.es/m/CA%2BhUKGLCkTT7zYjzOxuLGahBdQ%3DMcF%3Dz5ZvrjSOnW4EDhVjT-g%40mail.gmail.com
2023-09-26 10:59:49 +13:00
config Use --strip-unneeded when stripping static libraries with GNU strip. 2023-04-20 18:12:32 -04:00
contrib postgres_fdw: Fix test for parameterized foreign scan. 2023-08-30 17:15:08 +09:00
doc Doc: copy-edit the introductory para for the pg_class catalog. 2023-09-22 14:52:36 -04:00
src Fix edge-case for xl_tot_len broken by bae868ca. 2023-09-26 10:59:49 +13:00
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.gitignore Add portlock directory to .gitignore 2022-11-26 07:47:22 -05:00
aclocal.m4
configure Stamp 12.16. 2023-08-07 16:13:41 -04:00
configure.in Stamp 12.16. 2023-08-07 16:13:41 -04:00
COPYRIGHT Update copyright for 2023 2023-01-02 15:00:36 -05:00
GNUmakefile.in Remove temporary portlock directory during make [dist]clean. 2022-11-26 10:31:03 -05:00
HISTORY
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README
README.git

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/.