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It was possible for the code to read out-of-bound data from the "day_tab" table with some crafted input data. Let's treat these as invalid input as the month number is incorrect. A test is added to test this case with a check on the errno returned by the decoding routine. A test close to the new one added in this commit was testing for a failure, but did not look at the errno generated, so let's use this commit to also change it, adding a check on the errno returned by DecodeDateTime(). Like the other test scripts, dt_test should likely be expanded to include more checks based on the errnos generated in these code paths. This is left as future work. This issue exists since 2e6f97560a83, so backpatch all the way down. Reported-by: Pavel Nekrasov Author: Bruce Momjian, Pavel Nekrasov Discussion: https://postgr.es/m/18614-6bbe00117352309e@postgresql.org Backpatch-through: 12
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/.