There is an OpenQA anaconda test failure with Python 3.14 that manifests like this: install_default_update_netinst _boot_to_anaconda https://openqa.stg.fedoraproject.org/tests/5055781#step/_boot_to_anaconda/5 >>> from pyanaconda.argument_parsing import get_help_width ... >>> get_help_width() Traceback (most recent call last): File "<python-input-1>", line 1, in <module> get_help_width() ~~~~~~~~~~~~~~^^ File "/usr/lib64/python3.14/site-packages/pyanaconda/argument_parsing.py", line 68, in get_help_width data = fcntl.ioctl(sys.stdout, termios.TIOCGWINSZ, '1234') SystemError: buffer overflow $ python3.13 Python 3.13.3 (main, Apr 22 2025, 00:00:00) [GCC 14.2.1 20250110 (Red Hat 14.2.1-7)] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import sys, termios >>> import sys, termios, fcntl >>> fcntl.ioctl(sys.stdout, termios.TIOCGWINSZ, "1234") b'=\x00\xe1\x00' $ python3.14 Python 3.14.0b2 (main, May 26 2025, 00:00:00) [GCC 14.3.1 20250523 (Red Hat 14.3.1-1)] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import sys, termios, fcntl >>> fcntl.ioctl(sys.stdout, termios.TIOCGWINSZ, "1234") Traceback (most recent call last): File "<python-input-1>", line 1, in <module> fcntl.ioctl(sys.stdout, termios.TIOCGWINSZ, "1234") ~~~~~~~~~~~^^^^^^^^^^^^^^^^^ This might be a bug in Python.
Created attachment 2093342 [details] screen from OpenQA
>>> termios.TIOCGWINSZ 21523 This is the same on both.
https://github.com/python/cpython/commit/c2eaeee3dc3306ca486b0377b07b1a957584b691 Try to detect a buffer overflow in fcntl() and ioctl()
This works. >>> import sys, termios, fcntl, struct >>> data = fcntl.ioctl(sys.stdout, termios.TIOCGWINSZ, "12345678") >>> int(struct.unpack('hhhh', data)[1]) 225 We need to read 4 shorts, not 2: struct winsize { unsigned short ws_row; unsigned short ws_col; unsigned short ws_xpixel; unsigned short ws_ypixel; };
FEDORA-2025-d33ca319e1 (anaconda-43.24-1.fc43 and anaconda-webui-40-1.fc43) has been submitted as an update to Fedora 43. https://bodhi.fedoraproject.org/updates/FEDORA-2025-d33ca319e1
FEDORA-2025-d33ca319e1 (anaconda-43.24-1.fc43 and anaconda-webui-40-1.fc43) has been pushed to the Fedora 43 stable repository. If problem still persists, please make note of it in this bug report.