3191a593d6
stats_fetch_consistency set to "snapshot" causes the backend entry "beentry" retrieved by pgstat_get_beentry_by_proc_number() to be reset at the beginning of pgstat_fetch_stat_backend() when fetching the backend pgstats entry. As coded, "beentry" was being accessed after being freed. This commit moves all the accesses to "beentry" to happen before calling pgstat_fetch_stat_backend(), fixing the problem. This problem could be reached by calling the SQL functions pg_stat_get_backend_io() or pg_stat_get_backend_wal(). Issue caught by valgrind. Reported-by: Alexander Lakhin <exclusion@gmail.com> Author: Bertrand Drouvot <bertranddrouvot.pg@gmail.com> Discussion: https://postgr.es/m/f1788cc0-253a-4a3a-aee0-1b8ab9538736@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.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.