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When processing the "publish" options of an ALTER PUBLICATION command, we call SplitIdentifierString() to split the options into a List of strings. Since SplitIdentifierString() modifies the delimiter character and puts NULs in their place, this would overwrite the memory of the AlterPublicationStmt. Later in AlterPublicationOptions(), the modified AlterPublicationStmt is copied for event triggers, which would result in the event trigger only seeing the first "publish" option rather than all options that were specified in the command. To fix this, make a copy of the string before passing to SplitIdentifierString(). Here we also adjust a similar case in the pgoutput plugin. There's no known issues caused by SplitIdentifierString() here, so this is being done out of paranoia. Thanks to Henson Choi for putting together an example case showing the ALTER PUBLICATION issue. Author: sunil s <sunilfeb26@gmail.com> Reviewed-by: Henson Choi <assam258@gmail.com> Reviewed-by: zengman <zengman@halodbtech.com> Backpatch-through: 14 |
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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/.