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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"socketmodule.c: Reference and buffer leaks via audit hook failures","articleBody":"# Bug report\n\n### Bug description:\n\n## Summary\n\nTwo leak bugs in `socketmodule.c` triggered when `PySys_Audit` raises:\n\n1. `getaddrinfo` (line 6983): `idna` and/or `pstr` refs leaked when audit hook raises. ~657 objects leaked per 1000 calls.\n2. `sock_sendto` (line 4810): `pbuf` Py_buffer not released when audit hook raises.\n\n## Reproducer (getaddrinfo leak)\n\n```python\nimport socket, sys\n\nsys.addaudithook(lambda *a: (_ for _ in ()).throw(RuntimeError(\"audit\")))\nbefore = sys.gettotalrefcount()\nfor i in range(1000):\n    try:\n        socket.getaddrinfo(\"localhost\", 80)\n    except RuntimeError:\n        pass\nafter = sys.gettotalrefcount()\nprint(f\"Leaked {after - before} objects in 1000 calls\")\n```\n\n### CPython versions tested on:\n\nCPython main branch\n\n### Operating systems tested on:\n\n_No response_\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-146247\n* gh-146248\n* gh-146274\n* gh-146275\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/aisk","@type":"Person","name":"aisk"},"datePublished":"2026-03-21T08:30:40.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":5},"url":"https://github.com/146245/cpython/issues/146245"}