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gh-148651: Fix refcount leak in _zstd decompressor options (#148657)

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The option parsing in Modules/_zstd/decompressor.c had a missing Py_DECREF(value) before the early return -1 when PyLong_AsInt(key) fails. The identical code in Modules/_zstd/compressor.c line 158 has the fix.
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Michael Bommarito 2026-04-17 11:42:41 -04:00 • committed by GitHub
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commit 446edda209
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Misc/NEWS.d/next/Library/2026-04-16-13-30-00.gh-issue-148651.ZsTdLk.rst Normal file
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@ -0,0 +1,2 @@
Fix reference leak in :class:`compression.zstd.ZstdDecompressor` when an
invalid option key is passed.

1
Modules/_zstd/decompressor.c
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@ -111,6 +111,7 @@ _zstd_set_d_parameters(ZstdDecompressor *self, PyObject *options)
int key_v = PyLong_AsInt(key);
Py_DECREF(key);
if (key_v == -1 && PyErr_Occurred()) {
Py_DECREF(value);
return -1;
}