GeezerVison

The most straightforward approach to solving this issue is to re-consult the filter_function just before updating the attributes in the directory within extract_all(). However, this would result in stateful extraction filters receiving a redundant call for a file that has already passed the filter.

Inspired by GNU Tar, I decided to save the exact inode number of the created directory to ensure it hasn't changed.
The only downside I can see is that stat() is called shortly after the directory is created, which introduces a race condition. Since the entire module is already susceptible to these kinds of races (the path is resolved in the filter_function and then re-resolved in the actual file creation methods), I believe this is acceptable.

• Issue: TarFile.extractall(..., filter='tar') arbitrary file chmod #127987