"PostgreSQL Bugs List" <pgsql-bugs@postgresql.org> writes:
> With the THREAD_SAFETY changes, a buffer is defined on the stack as:
> char pwdbuf[BUFSIZ];
> This buffer overflows the stack when used in a thread. As the application
> creating the thread cannot be modified to increase the stack size, it would
> probably be prudent to reduce this buffer size (I believe that BUFSIZ is
> around 8192 bytes on most modern Unix implementations).
No, it would be prudent to fix the app. While this one particular
buffer might be larger than needed, we are *not* going to buy into the
notion that libpq needs to run successfully in an 8K stack. This
particular problem is only the tip of the iceberg; hewing to any
such limit is going to require far more drastic changes that just don't
seem worthwhile.
regards, tom lane