55fe26a4b5
The allocation of the cryptohash context data when building with OpenSSL was happening in the memory context of the caller of pg_cryptohash_create(), which could lead to issues with resowner cleanup if cascading resources are cleaned up on an error. Like other facilities using resowners, move the base allocation to TopMemoryContext to ensure a correct cleanup on failure. The resulting code gets simpler with this commit as the context data is now hold by a unique opaque pointer, so as there is only one single allocation done in TopMemoryContext. After discussion, also change the cryptohash subroutines to return an error if the caller provides NULL for the context data to ease error detection on OOM. Author: Heikki Linnakangas Discussion: https://postgr.es/m/X9xbuEoiU3dlImfa@paquier.xyz
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/.