[New-bugs-announce] [issue38540] Possible leaks in PyArg_Parse for "es#" and "et#"

[Serhiy Storchaka]

New submission from Serhiy Storchaka <storchaka+cpython at gmail.com>:

There are possible leaks in PyArg_Parse and similar functions for format units "es#" and "et#". Macros STORE_SIZE and (since 3.8) FETCH_SIZE can leave the function despite there is an own reference to an encoded string (s). The leak is only possible when PY_SSIZE_T_CLEAN is not defined.

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components: Interpreter Core
messages: 355022
nosy: inada.naoki, serhiy.storchaka
priority: normal
severity: normal
status: open
title: Possible leaks in PyArg_Parse for "es#" and "et#"
type: resource usage
versions: Python 2.7, Python 3.7, Python 3.8, Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue38540>
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