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When pgbench runs with multiple threads and verbose error reporting is enabled (--verbose-errors), multiple clients can build verbose error messages concurrently. Previously, a function-local static PQExpBuffer was used for these messages, causing the buffer to be shared across threads. This was not thread-safe and could result in corrupted or incorrect log output. Fix this by using a local PQExpBufferData instead of a static buffer. This keeps verbose error messages correct during concurrent execution. Backpatch to v15, where this issue was introduced. Author: Fujii Masao <masao.fujii@gmail.com> Reviewed-by: Michael Paquier <michael@paquier.xyz> Reviewed-by: Alex Guo <guo.alex.hengchen@gmail.com> Reviewed-by: Chao Li <li.evan.chao@gmail.com> Discussion: https://postgr.es/m/CAHGQGwER1AjGXpkKB9t9820NBhMQ_Ghv7=HsKeodUr3=SZsF4g@mail.gmail.com Backpatch-through: 15 |
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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/.