Bug report

Bug description:

TarFile.extractall() does not perform path normalization before calling os.lstat(). This is an issue on Windows as the resulting path ends us using Windows-style (\\) and unix-style (/) path separators. This results in the following error: OSError: [WinError 123] The filename, directory name, or volume label syntax is incorrect: '\\\\?\\Z:\\extracted\\double-conversion-v3.1.4.tar.gz\\double-conversion-3.1.4/test/cctest'.

from Lib import tarfile
with tarfile.open(r'\\?\Z:\downloads\double-conversion-v3.1.4.tar.gz') as t:
 t.extractall(r'\\?\Z:\extracted\double-conversion-v3.1.4.tar.gz')

CPython versions tested on:

3.13, CPython main branch

Operating systems tested on:

Windows

Linked PRs

• gh-143663: Perform path normalization in TarFile.extractall() #143665