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[3.14] gh-151295: Fix use-after-free in bytes.join()/bytearray.join() via re-entrant __buffer__ (GH-151296) #196077

[3.14] gh-151295: Fix use-after-free in bytes.join()/bytearray.join() via re-entrant __buffer__ (GH-151296)

[3.14] gh-151295: Fix use-after-free in bytes.join()/bytearray.join() via re-entrant __buffer__ (GH-151296) #196077

Triggered via pull request June 11, 2026 07:52
Status Success
Total duration 26m 35s
Artifacts 1

build.yml

on: pull_request
Change detection  /  Create context from changed files
11s
Change detection / Create context from changed files
Matrix: Address sanitizer
Matrix: build-macos
Matrix: build-san
Matrix: Ubuntu SSL tests
Matrix: build-ubuntu
Matrix: build-windows-msi
Waiting for pending jobs
Matrix: build-windows
Matrix: cifuzz
Waiting for pending jobs
Docs  /  Docs
2m 1s
Docs / Docs
Docs  /  Doctest
6m 51s
Docs / Doctest
Docs  /  Check EPUB
2m 14s
Docs / Check EPUB
Check if Autoconf files are up to date
24s
Check if Autoconf files are up to date
Check if generated files are up to date
3m 43s
Check if generated files are up to date
iOS
15m 55s
iOS
Emscripten  /  build and test
18m 0s
Emscripten / build and test
WASI  /  build and test
7m 9s
WASI / build and test
Hypothesis tests on Ubuntu
8m 17s
Hypothesis tests on Ubuntu
Cross build Linux
3m 58s
Cross build Linux
Check if the ABI has changed
1m 37s
Check if the ABI has changed
Matrix: build-android
All required checks pass
5s
All required checks pass
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2 errors and 16 warnings
Docs / Docs
Process completed with exit code 2.
Docs / Check EPUB
Process completed with exit code 1.
Hypothesis tests on Ubuntu
No files were found with the provided path: /home/runner/work/cpython/cpython-builddir/.hypothesis/examples/. No artifacts will be uploaded.
macOS (free-threading) / build and test (macos-26)
`$HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK` is set: not checking for outdated dependents or dependents with broken linkage!
macOS / build and test (macos-26)
`$HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK` is set: not checking for outdated dependents or dependents with broken linkage!
Windows / Build and test (x64): Modules/unicodedata.c#L1569
'function': conversion from 'size_t' to 'int', possible loss of data [D:\a\cpython\cpython\PCbuild\unicodedata.vcxproj]
Windows / Build and test (x64): Python/generated_cases.c.h#L12346
'initializing': conversion from '__int64' to 'int', possible loss of data [D:\a\cpython\cpython\PCbuild\pythoncore.vcxproj]
Windows / Build and test (x64): Python/generated_cases.c.h#L7662
'initializing': conversion from '__int64' to 'int', possible loss of data [D:\a\cpython\cpython\PCbuild\pythoncore.vcxproj]
Windows / Build and test (arm64): Modules/unicodedata.c#L1569
'function': conversion from 'size_t' to 'int', possible loss of data [C:\a\cpython\cpython\PCbuild\unicodedata.vcxproj]
Windows / Build and test (arm64): Python/generated_cases.c.h#L12346
'initializing': conversion from '__int64' to 'int', possible loss of data [C:\a\cpython\cpython\PCbuild\pythoncore.vcxproj]
Windows / Build and test (arm64): Python/generated_cases.c.h#L7662
'initializing': conversion from '__int64' to 'int', possible loss of data [C:\a\cpython\cpython\PCbuild\pythoncore.vcxproj]
macOS / build and test (macos-15-intel)
`$HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK` is set: not checking for outdated dependents or dependents with broken linkage!
Windows (free-threading) / Build and test (x64): Modules/unicodedata.c#L1569
'function': conversion from 'size_t' to 'int', possible loss of data [D:\a\cpython\cpython\PCbuild\unicodedata.vcxproj]
Windows (free-threading) / Build and test (x64): Python/generated_cases.c.h#L12346
'initializing': conversion from '__int64' to 'int', possible loss of data [D:\a\cpython\cpython\PCbuild\pythoncore.vcxproj]
Windows (free-threading) / Build and test (x64): Python/generated_cases.c.h#L7662
'initializing': conversion from '__int64' to 'int', possible loss of data [D:\a\cpython\cpython\PCbuild\pythoncore.vcxproj]
Windows (free-threading) / Build and test (arm64): Modules/unicodedata.c#L1569
'function': conversion from 'size_t' to 'int', possible loss of data [C:\a\cpython\cpython\PCbuild\unicodedata.vcxproj]
Windows (free-threading) / Build and test (arm64): Python/generated_cases.c.h#L12346
'initializing': conversion from '__int64' to 'int', possible loss of data [C:\a\cpython\cpython\PCbuild\pythoncore.vcxproj]
Windows (free-threading) / Build and test (arm64): Python/generated_cases.c.h#L7662
'initializing': conversion from '__int64' to 'int', possible loss of data [C:\a\cpython\cpython\PCbuild\pythoncore.vcxproj]

Artifacts

Produced during runtime
Name Size Digest
UBSan-logs-default
1.55 KB
sha256:3c2b53fa379c5203e36161ef072736620b9adde0b578e50a45f3d100f69a465f