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Commita65fe07

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[3.13]gh-123243: Fix reference leak in_decimal (GH-123244) (#123280)
gh-123243: Fix reference leak in `_decimal` (GH-123244)(cherry picked from commit5ff638f)Co-authored-by: neonene <53406459+neonene@users.noreply.github.com>
1 parent935b8b4 commita65fe07

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Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
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1+
Fix memory leak in:mod:`!_decimal`.

‎Modules/_decimal/_decimal.c‎

Lines changed: 24 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -1390,6 +1390,10 @@ context_new(PyTypeObject *type, PyObject *args UNUSED, PyObject *kwds UNUSED)
13901390
CtxCaps(self)=1;
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self->tstate=NULL;
13921392

1393+
if (type==state->PyDecContext_Type) {
1394+
PyObject_GC_Track(self);
1395+
}
1396+
assert(PyObject_GC_IsTracked((PyObject*)self));
13931397
return (PyObject*)self;
13941398
}
13951399

@@ -2038,6 +2042,10 @@ PyDecType_New(PyTypeObject *type)
20382042
MPD(dec)->alloc=_Py_DEC_MINALLOC;
20392043
MPD(dec)->data=dec->data;
20402044

2045+
if (type==state->PyDec_Type) {
2046+
PyObject_GC_Track(dec);
2047+
}
2048+
assert(PyObject_GC_IsTracked((PyObject*)dec));
20412049
return (PyObject*)dec;
20422050
}
20432051
#definedec_alloc(st) PyDecType_New((st)->PyDec_Type)
@@ -6143,8 +6151,22 @@ decimal_clear(PyObject *module)
61436151
Py_CLEAR(state->SignalTuple);
61446152
Py_CLEAR(state->PyDecimal);
61456153

6146-
PyMem_Free(state->signal_map);
6147-
PyMem_Free(state->cond_map);
6154+
if (state->signal_map!=NULL) {
6155+
for (DecCondMap*cm=state->signal_map;cm->name!=NULL;cm++) {
6156+
Py_DECREF(cm->ex);
6157+
}
6158+
PyMem_Free(state->signal_map);
6159+
state->signal_map=NULL;
6160+
}
6161+
6162+
if (state->cond_map!=NULL) {
6163+
// cond_map[0].ex has borrowed a reference from signal_map[0].ex
6164+
for (DecCondMap*cm=state->cond_map+1;cm->name!=NULL;cm++) {
6165+
Py_DECREF(cm->ex);
6166+
}
6167+
PyMem_Free(state->cond_map);
6168+
state->cond_map=NULL;
6169+
}
61486170
return0;
61496171
}
61506172

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