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e7428a99a1
Add hardening to the heapam index tuple deletion path to catch TIDs in index pages that point to a heap item that index tuples should never point to. The corruption we're trying to catch here is particularly tricky to detect, since it typically involves "extra" (corrupt) index tuples, as opposed to the absence of required index tuples in the index. For example, a heap TID from an index page that turns out to point to an LP_UNUSED item in the heap page has a good chance of being caught by one of the new checks. There is a decent chance that the recently fixed parallel VACUUM bug (see commit 9bacec15) would have been caught had that particular check been in place for Postgres 14. No backpatch of this extra hardening for now, though. Author: Peter Geoghegan <pg@bowt.ie> Reviewed-By: Andres Freund <andres@anarazel.de> Discussion: https://postgr.es/m/CAH2-Wzk-4_raTzawWGaiqNvkpwDXxv3y1AQhQyUeHfkU=tFCeA@mail.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. 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/.