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Robert Foggia of Trustwave reported that read_tablespace_map() fails to prevent an overrun of its on-stack input buffer. Since the tablespace map file is presumed trustworthy, this does not seem like an interesting security vulnerability, but still we should fix it just in the name of robustness. While here, document that pg_basebackup's --tablespace-mapping option doesn't work with tar-format output, because it doesn't. To make it work, we'd have to modify the tablespace_map file within the tarball sent by the server, which might be possible but I'm not volunteering. (Less-painful solutions would require changing the basebackup protocol so that the source server could adjust the map. That's not very appetizing either.)
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/.