31ad154242
When a hash table grows large enough we try to expand the directory, but we shouldn't try to do that if the hash table is marked as HASH_FIXED_SIZE. Before commit9fe9ecd516that was harmless, although it was a little weird to expand the directory when allocating the new element was doomed to fail later anyway. But the new allocator function added in that commit for shared memory hash tables did not expect to be called after hash table creation at all and would just crash. Fix by ensuring that the allocator is not called after hash table creation for HASH_FIXED_SIZE tables. The crash started with commit9fe9ecd516in v19, so backpatch to v19. To trigger the crash, you needed a shared memory hash table of just the right size so that we would attempt to resize it: power-of-2 and at least HASH_SEGSIZE (256) elements. With any other size, you would run out of allocated elements first. Author: Konstantin Knizhnik <knizhnik@garret.ru> Reviewed-by: Rahila Syed <rahilasyed90@gmail.com> Discussion: https://www.postgresql.org/message-id/d59221f2-b3d2-41ad-8bf0-d581b42e4cba@garret.ru 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/19/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/19/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/.