c6e7a9ef30
Although pg_strftime() has defined error conditions, no callers bother to check for errors. This is problematic because the output string is very likely not null-terminated if an error occurs, so that blindly using it is unsafe. Rather than trusting that we can find and fix all the callers, let's alter the function's API spec slightly: make it guarantee a null-terminated result so long as maxsize > 0. Furthermore, if we do get an error, let's make that null-terminated result be an empty string. We could instead truncate at the buffer length, but that risks producing mis-encoded output if the tz_name string contains multibyte characters. It doesn't seem reasonable for src/timezone/ to make use of our encoding-aware truncation logic. Also, the only really likely source of a failure is a user-supplied timezone name that is intentionally trying to overrun our buffers. I don't feel a need to be particularly friendly about that case. Author: Tom Lane <tgl@sss.pgh.pa.us> Reviewed-by: John Naylor <johncnaylorls@gmail.com> Backpatch-through: 14 Security: CVE-2026-6474 |
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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/18/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/18/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/.