[3.13] gh-142560: prevent use-after-free in search-like methods by exporting buffer in bytearray (GH-142938)#142986
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serhiy-storchaka merged 3 commits intopython:3.13from Dec 24, 2025
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… by exporting buffer in bytearray (pythonGH-142938) (cherry picked from commit 220f0b1) Co-authored-by: wangxiaolei <fatelei@gmail.com>
cmaloney
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kumaraditya303,
serhiy-storchaka and
vstinner
This was referenced Dec 19, 2025
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Sadly, the build fails :-( |
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Will work on resolving in a bit; free threaded build worked for me... i need to improve my local tools for doing multiple builds |
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Updated to drop the critical sections / locking |
kumaraditya303
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Dec 20, 2025
serhiy-storchaka
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Dec 22, 2025
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LGTM. 👍
But the NEWS entry should be in the Core and Builtins section.
vstinner
approved these changes
Dec 23, 2025
serhiy-storchaka
approved these changes
Dec 24, 2025
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This backport is more intricate as free threading / locking / critical sections was only added to
bytearrayin 3.14. This drops all critical section pieces (thread-safety forbytearraywas added in 3.14)this makesbytearraysafer in 3.13 (The methods that use_bytearray_with_buffershould now be thread safe as it does the critical section), but I did not make all the methods thread safe that are thread safe in 3.14 (Without the clinic annotation doing so well is a lot more difficult)(cherry picked from commit 220f0b1)
bytearraysearch methods via re-entrant__index__#142560