10000 [3.12] gh-135034: Normalize link targets in tarfile, add `os.path.realpath(strict='allow_missing')` (GH-135037) by Yhg1s · Pull Request #135066 · python/cpython · GitHub
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[3.12] gh-135034: Normalize link targets in tarfile, add os.path.realpath(strict='allow_missing') (GH-135037) #135066

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Merged
merged 10 commits into from
Jun 3, 2025
+1,064 −139
Merged

[3.12] gh-135034: Normalize link targets in tarfile, add os.path.realpath(strict='allow_missing') (GH-135037) #135066

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c358142
[3.12] gh-135034: Normalize link targets in tarfile, add `os.path.rea…
ambv Jun 3, 2025
3c10cf0
Fix merge snafu
Yhg1s Jun 3, 2025
f5f9555
Fix test failure in test_tarfile
Yhg1s Jun 3, 2025
2b5673e
Drop backport of extra tests that don't really address security conce…
Yhg1s Jun 3, 2025
70f9db5
Fix a few tests, and a glaring logic error in the posixpath backport.
Yhg1s Jun 3, 2025
1d242c3
Fix Windows test_ntpath failures.
Yhg1s Jun 3, 2025
12ac4a5
Drop test methods for unreadable symlinks (on darwin), which aren't
Yhg1s Jun 3, 2025
8f53def
Don't export LinkFallbackError from tarfile.
Yhg1s Jun 3, 2025
2c2df0d
Add back test_realpath_unreadable_symlink_strict
encukou Jun 3, 2025
ead96bb
Fix merge error in backport.
Yhg1s Jun 3, 2025
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Don't export LinkFallbackError from tarfile.
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@Yhg1s
Yhg1s committed Jun 3, 2025
commit 8f53def844c5d10b221f52413a01590d1eec3549
2 changes: 1 addition & 1 deletion Lib/tarfile.py
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Expand Up @@ -69,7 +69,7 @@
"DEFAULT_FORMAT", "open","fully_trusted_filter", "data_filter",
"tar_filter", "FilterError", "AbsoluteLinkError",
"OutsideDestinationError", "SpecialFileError", "AbsolutePathError",
"LinkOutsideDestinationError", "LinkFallbackError"]
"LinkOutsideDestinationError"]


#---------------------------------------------------------
A4E6 Expand Down
3 changes: 2 additions & 1 deletion Lib/test/test_tarfile.py
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Expand Up @@ -2630,7 +2630,8 @@ def test__all__(self):
'PAX_NUMBER_FIELDS', 'stn', 'nts', 'nti', 'itn', 'calc_chksums',
'copyfileobj', 'filemode', 'EmptyHeaderError',
'TruncatedHeaderError', 'EOFHeaderError', 'InvalidHeaderError',
'SubsequentHeaderError', 'ExFileObject', 'main'}
'SubsequentHeaderError', 'ExFileObject', 'main',
"LinkFallbackError"}
support.check__all__(self, tarfile, not_exported=not_exported)

def test_useful_error_message_when_modules_missing(self):
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