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If an error occurs before we close the fake relcache entry, the the fake relcache entry will be destroyed by the SmgrRelation will survive until end of transaction. Its smgr_owner pointer ends up pointing to already-freed memory. The original reason for using a fake relcache entry here was to try to avoid reusing an SMgrRelation across a relevant invalidation. To avoid that problem, just call smgropen() again each time we need a reference to it. Hopefully someday we will come up with a more elegant approach, but accessing uninitialized memory is bad so let's do this for now. Dilip Kumar, reviewed by Andres Freund and Tom Lane. Report by Justin Pryzby. Discussion: http://postgr.es/m/20220802175043.GA13682@telsasoft.com Discussion: http://postgr.es/m/CAFiTN-vSFeE6_W9z698XNtFROOA_nSqUXWqLcG0emob_kJ+dEQ@mail.gmail.com
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/.