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gh-156939: Detect buffer overflow in bytes and bytearray - #157529
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vstinner merged 6 commits intoSep 15, 2026
Merged
vstinner merged 6 commits into
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When Python is built in debug mode, bytes an bytearray destructors now check if the trailing null byte has been overridden to detect overflow. Add bytes_dealloc() to implement the check.
cmaloney
approved these changes
Sep 14, 2026
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Objects/bytearrayobject.c
Exit also earlier in byteswriter_reset_trailing_byte()
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"Tests / CIFuzz / cpython3 (address)" failed with a network failure. Since the job is not mandatory, I ignore it for now. 2026-09-15 13:42:11,991 - urllib3.connectionpool - DEBUG - Starting new HTTPS connection (1): storage.googleapis.com:443
...
requests.exceptions.ConnectionError: ('Connection aborted.', ConnectionResetError(104, 'Connection reset by peer'))
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Merged. Thanks for the review @cmaloney. |
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When Python is built in debug mode, bytes an bytearray destructors now check if the trailing null byte has been overridden to detect overflow. Add bytes_dealloc() to implement the check.