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ri_FastPathCheck() called index_beginscan() before switching to the referenced relation's owner for the permission check and probe. For btree this has no consequence, but starting the scan before the user id switch sets a poor example for code dealing with out-of-tree access methods, whose beginscan could observe the wrong user id. Move index_beginscan() after the SetUserIdAndSecContext() call. Reported-by: Noah Misch <noah@leadboat.com> Reviewed-by: Ayush Tiwari <ayushtiwari.slg01@gmail.com> Discussion: https://postgr.es/m/20260705210533.ee.noahmisch@microsoft.com Backpatch-through: 19
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/.