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gh-111178: fix UBSan failures in Modules/_winapi.c #129796

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Merged
encukou merged 5 commits into from
Feb 24, 2025
Merged

gh-111178: fix UBSan failures in Modules/_winapi.c #129796

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fccf4cb
fix UBSan failures for `OverlappedObject`
picnixz Jan 25, 2025
c38e3d3
suppress unused return values
picnixz Jan 25, 2025
cc1f0c1
Merge remote-tracking branch 'upstream/main' into fix/ubsan/winapi-11…
picnixz Feb 7, 2025
72737d0
Do Do not use `_` + capital letter in new code as it is also UB.
picnixz Feb 8, 2025
30a8a6b
Merge branch 'main' into fix/ubsan/winapi-111178
encukou Feb 18, 2025
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Do Do not use _ + capital letter in new code as it is also UB.
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@picnixz
picnixz committed Feb 8, 2025
commit 72737d076ac4358ba60063a95c7599fff620040c
6 changes: 3 additions & 3 deletions Modules/_winapi.c
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Original file line number Diff line number Diff line change
Expand Up @@ -144,7 +144,7 @@ typedef struct {
Py_buffer write_buffer;
} OverlappedObject;

#define _OverlappedObject_CAST(op) ((OverlappedObject *)(op))
#define OverlappedObject_CAST(op) ((OverlappedObject *)(op))

/*
Note: tp_clear (overlapped_clear) is not implemented because it
Expand All @@ -154,7 +154,7 @@ quite complex and can fail (see: overlapped_dealloc).
static int
overlapped_traverse(PyObject *op, visitproc visit, void *arg)
{
OverlappedObject *self = _OverlappedObject_CAST(op);
OverlappedObject *self = OverlappedObject_CAST(op);
Py_VISIT(self->read_buffer);
Py_VISIT(self->write_buffer.obj);
Py_VISIT(Py_TYPE(self));
Expand All @@ -166,7 +166,7 @@ overlapped_dealloc(PyObject *op)
{
DWORD bytes;
int err = GetLastError();
OverlappedObject *self = _OverlappedObject_CAST(op);
OverlappedObject *self = OverlappedObject_CAST(op);

PyObject_GC_UnTrack(self);
if (self->pending) {
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