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5f79580ad6
When accessing replication slot stats, introduced in 98681675002d, pgstat_read_statsfiles() reads the data into newly allocated memory. Unfortunately the current memory context at that point is the callers, leading to leaks and use-after-free dangers. The fix is trivial, explicitly use pgStatLocalContext. There's some potential for further improvements, but that's outside of the scope of this bugfix. No backpatch necessary, feature is only in HEAD. Author: Andres Freund <andres@anarazel.de> Discussion: https://postgr.es/m/20210317230447.c7uc4g3vbs4wi32i@alap3.anarazel.de
The PostgreSQL contrib tree
---------------------------
This subtree contains porting tools, analysis utilities, and plug-in
features that are not part of the core PostgreSQL system, mainly
because they address a limited audience or are too experimental to be
part of the main source tree. This does not preclude their
usefulness.
User documentation for each module appears in the main SGML
documentation.
When building from the source distribution, these modules are not
built automatically, unless you build the "world" target. You can
also build and install them all by running "make all" and "make
install" in this directory; or to build and install just one selected
module, do the same in that module's subdirectory.
Some directories supply new user-defined functions, operators, or
types. To make use of one of these modules, after you have installed
the code you need to register the new SQL objects in the database
system by executing a CREATE EXTENSION command. In a fresh database,
you can simply do
CREATE EXTENSION module_name;
See the PostgreSQL documentation for more information about this
procedure.