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GeezerVison is showing github.com — [3.11] gh-160506: Fix ntpath.realpath() for broken links via directory links (GH-160507) by miss-islington · Pull Request #161030 · python/cpython

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@miss-islington

@miss-islington miss-islington commented Oct 31, 2026 •
edited by bedevere-app Bot
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Resolve the directory containing a broken relative symlink before
joining the link target to it, so that '..' in the target is applied
to the real directory.

ANT-2026-27II3A20
(cherry picked from commit 65665a4)

Co-authored-by: Gregory P. Smith [email protected]

  • Issue: os.path.realpath() on Windows misresolves a broken symlink reached through a directory symlink #160506

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@gpshead @miss-islington
pythongh-160506: Fix ntpath.realpath() for broken links via directory…
bcb431c 
… links (pythonGH-160507)

Resolve the directory containing a broken relative symlink before
joining the link target to it, so that '..' in the target is applied
to the real directory.

ANT-2026-27II3A20
(cherry picked from commit 65665a4)

Co-authored-by: Gregory P. Smith <[email protected]>
@miss-islington
miss-islington requested a review from ethanfurman as a code owner October 31, 2026 19:09
@bedevere-app bedevere-app Bot added the awaiting review label Oct 31, 2026
This was referenced Oct 31, 2026
os.path.realpath() on Windows misresolves a broken symlink reached through a directory symlink #160506
Closed
gh-160506: Fix ntpath.realpath() for broken links via directory links #160507
Merged
@bedevere-app bedevere-app Bot added sprint type-security A security issue labels Oct 31, 2026
@github-project-automation github-project-automation Bot added this to Sprint Oct 31, 2026
@github-project-automation github-project-automation Bot moved this to Todo in Sprint Oct 31, 2026
@gpshead gpshead added the release-blocker label Oct 31, 2026
@github-project-automation github-project-automation Bot added this to Release and Deferred blockers 🚫 Oct 31, 2026
@github-project-automation github-project-automation Bot moved this to Todo in Release and Deferred blockers 🚫 Oct 31, 2026
@gpshead
Drop ALL_BUT_LAST from the backported test; it does not exist in 3.11
3691085
@gpshead gpshead closed this Nov 9, 2026
@gpshead gpshead reopened this Nov 9, 2026
@github-project-automation github-project-automation Bot moved this from Todo to Done in Release and Deferred blockers 🚫 Nov 9, 2026
@github-project-automation github-project-automation Bot moved this from Todo to Done in Sprint Nov 9, 2026
@github-project-automation github-project-automation Bot moved this from Done to In Progress in Release and Deferred blockers 🚫 Nov 9, 2026
@github-project-automation github-project-automation Bot moved this from Done to In Progress in Sprint Nov 9, 2026
gpshead added 2 commits November 9, 2026 02:16
@gpshead
Expect an OSError from test_parent_symlink3 fully_trusted on Windows
b4f2766 
Before 3.15, tarfile keeps the '/' in symlink targets on Windows
(pythongh-57911), so writing through the '../evil' link fails, as already
handled in test_parent_symlink2.
@gpshead
Skip test_parent_symlink3 on Windows
3d03089 
Before 3.15, tarfile keeps the '/' in symlink targets on Windows
(pythongh-57911), so the links it creates cannot be followed and realpath()
fails on them.  test_ntpath covers the fix on Windows.
@gpshead gpshead assigned pablogsal Nov 9, 2026
@hugovk hugovk mentioned this pull request Nov 9, 2026
[3.11] gh-128504: Pin the doctest workflow to Ubuntu 24.04 #161664
Merged
@hugovk
Merge branch '3.11' into backport-65665a4-3.11
9971cb3
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@ethanfurman ethanfurman Awaiting requested review from ethanfurman ethanfurman is a code owner

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4 participants

@miss-islington @gpshead @pablogsal @hugovk
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