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Attempting to use this function with a raw page not coming from a GiST index would cause a crash, as it was missing the same sanity checks as gist_page_items_bytea(). This slightly refactors the code so as all the basic validation checks for GiST pages are done in a single routine, in the same fashion as the pageinspect functions for hash and BRIN. This fixes an issue similar to 076f4d9. A test is added to stress for this case. While on it, I have added a similar test for brin_page_items() with a combination make of a valid GiST index and a raw btree page. This one was already protected, but it was not tested. Reported-by: Egor Chindyaskin Author: Dmitry Koval Discussion: https://postgr.es/m/17815-fc4a2d3b74705703@postgresql.org Backpatch-through: 14
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/.