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gh-143543: Fix re-entrant use-after-free in itertools.groupby - #143738

Merged

encukou merged 22 commits into

python:mainfrom

VanshAgarwal24036:gh-143543-groupby-uaf

Feb 9, 2026

Merged

gh-143543: Fix re-entrant use-after-free in itertools.groupby#143738
encukou merged 22 commits into
python:mainfrom
VanshAgarwal24036:gh-143543-groupby-uaf

Commits on Jan 13, 2026
- gh-143543: Fix re-entrant use-after-free in itertools.groupby
  VanshAgarwal24036
  committed
  e898626
- Fix whitespace per prek
  VanshAgarwal24036
  committed
  ba974bc
- Add NEWS entry for itertools.groupby crash fix
  VanshAgarwal24036
  committed
  0debc2a
- Fix NEWS filename for gh-143543
  VanshAgarwal24036
  committed
  8d83176
- Fix NEWS entry type for gh-143543
  VanshAgarwal24036
  committed
  ca932bf
- Remove incorrect NEWS files for gh-143543
  VanshAgarwal24036
  committed
  0e86303
- Avoid borrowed references during groupby key comparison
  VanshAgarwal24036
  committed
  740218c
- Clarify NEWS entry wording
  VanshAgarwal24036
  committed
  e3a54be
- Fix refcounting during groupby key comparison
  VanshAgarwal24036
  committed
  9983345
- Add NEWS entry via blurb for itertools.groupby crash
  VanshAgarwal24036
  committed
  1ea51c0
- Fix duplicate variable declarations in groupby_next
  VanshAgarwal24036
  committed
  336c367
- itertools: hold strong references during groupby key comparison
  VanshAgarwal24036
  committed
  9cbe1a6
Commits on Jan 14, 2026
- Clarify re-entrant groupby key comparison comment
  VanshAgarwal24036
  committed
  8c61450
- Update Modules/itertoolsmodule.c
  
  VanshAgarwal24036
  and
  skirpichev
  authored
  90e995b
- Update Lib/test/test_itertools.py
  
  VanshAgarwal24036
  and
  skirpichev
  authored
  4f2338f
- Simplify groupby re-entrancy test
  VanshAgarwal24036
  committed
  2cac26b
- Move rcmp declaration and clarify re-entrancy comment
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  committed
  fed7db7
- Move comment before declarations and inline rcmp
  VanshAgarwal24036
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  4939083
- Remove Extra lines
  VanshAgarwal24036
  committed
  e42b9b4
Commits on Jan 15, 2026
- Remove extra Lines
  VanshAgarwal24036
  committed
  e29c818
Commits on Feb 3, 2026
- Update Lib/test/test_itertools.py
  
  VanshAgarwal24036
  and
  encukou
  authored
  4be9d4f
Commits on Feb 4, 2026
- Merge branch 'main' into gh-143543-groupby-uaf
  encukou
  authored
  b48d388

gh-143543: Fix re-entrant use-after-free in itertools.groupby by VanshAgarwal24036 · Pull Request #143738 · python/cpython · GitHub

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gh-143543: Fix re-entrant use-after-free in itertools.groupby - #143738

gh-143543: Fix re-entrant use-after-free in itertools.groupby#143738encukou merged 22 commits intopython:mainpython/cpython:mainfrom VanshAgarwal24036:gh-143543-groupby-uafVanshAgarwal24036/cpython:gh-143543-groupby-uafCopy head branch name to clipboard

Commits

Commits on Jan 13, 2026

Commits on Jan 14, 2026

Commits on Jan 15, 2026

Commits on Feb 3, 2026

Commits on Feb 4, 2026

gh-143543: Fix re-entrant use-after-free in itertools.groupby#143738
encukou merged 22 commits into
python:mainfrom
VanshAgarwal24036:gh-143543-groupby-uaf