8000 gh-111178: fix UBSan failures in `Modules/_interp*module.c` by picnixz · Pull Request #129779 · python/cpython · GitHub
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gh-111178: fix UBSan failures in Modules/_interp*module.c #129779

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Merged
merged 10 commits into from
Feb 17, 2025
Merged

gh-111178: fix UBSan failures in Modules/_interp*module.c #129779

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be385ff
remove redundant casts in `Modules/_interpchannelsmodule.c`
picnixz Jan 25, 2025
ae33ded
suppress unused return values in `Modules/_interpchannelsmodule.c`
picnixz Jan 25, 2025
712953d
suppress unused return values in `Modules/_interpqueuesmodule.c`
picnixz Jan 25, 2025
7dad552
fix UBSan failures for `XIBufferViewObject`
picnixz Jan 25, 2025
81d2315
suppress unused return values in `Modules/_interpretersmodule.c`
picnixz Jan 25, 2025
baee622
Merge remote-tracking branch 'upstream/main' into fix/ubsan/interp-11…
picnixz Feb 7, 2025
d4483e0
do not use the macro when the type is already checked
picnixz Feb 7, 2025
e2ee75e
fix compilation
picnixz Feb 7, 2025
2794f87
Do not add an underscore to the macro if none is needed.
picnixz Feb 8, 2025
9c6f69c
Do Do not use `_` + capital letter in new code as it is also UB.
picnixz Feb 8, 2025
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fix UBSan failures for XIBufferViewObject
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@picnixz
picnixz committed Jan 25, 2025
commit 7dad5529e4d6d532f3d0cb957d5b7a7225a2b6fd
14 changes: 9 additions & 5 deletions Modules/_interpretersmodule.c
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Original file line number Diff line number Diff line change
Expand Up @@ -83,6 +83,8 @@ typedef struct {
int64_t interpid;
} XIBufferViewObject;

#define _XIBufferViewObject_CAST(op) ((XIBufferViewObject *)(op))

static PyObject *
xibufferview_from_xid(PyTypeObject *cls, _PyXIData_t *data)
{
Expand All @@ -100,8 +102,9 @@ xibufferview_from_xid(PyTypeObject *cls, _PyXIData_t *data)
}

static void
xibufferview_dealloc(XIBufferViewObject *self)
xibufferview_dealloc(PyObject *op)
{
XIBufferViewObject *self = _XIBufferViewObject_CAST(op);
PyInterpreterState *interp = _PyInterpreterState_LookUpID(self->interpid);
/* If the interpreter is no longer alive then we have problems,
since other objects may be using the buffer still. */
Expand All @@ -124,20 +127,21 @@ xibufferview_dealloc(XIBufferViewObject *self)
}

static int
xibufferview_getbuf(XIBufferViewObject *self, Py_buffer *view, int flags)
xibufferview_getbuf(PyObject *op, Py_buffer *view, int flags)
{
/* Only PyMemoryView_FromObject() should ever call this,
via _memoryview_from_xid() below. */
XIBufferViewObject *self = _XIBufferViewObject_CAST(op);
*view = *self->view;
view->obj = (PyObject *)self;
view->obj = op;
// XXX Should we leave it alone?
view->internal = NULL;
return 0;
}

static PyType_Slot XIBufferViewType_slots[] = {
{Py_tp_dealloc, (destructor)xibufferview_dealloc},
{Py_bf_getbuffer, (getbufferproc)xibufferview_getbuf},
{Py_tp_dealloc, xibufferview_dealloc},
{Py_bf_getbuffer, xibufferview_getbuf},
// We don't bother with Py_bf_releasebuffer since we don't need it.
{0, NULL},
};
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