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gh-111178: fix UBSan failures in Modules/_jsonmodule.c #129781

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Merged
encukou merged 5 commits into from
Feb 17, 2025
Merged

gh-111178: fix UBSan failures in Modules/_jsonmodule.c #129781

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a94db65
fix UBSan failures for `json::PyScannerObject`
picnixz Jan 25, 2025
2f41394
fix UBSan failures for `json::PyEncoderObject`
picnixz Jan 25, 2025
ec3b018
Merge remote-tracking branch 'upstream/main' into fix/ubsan/json-111178
picnixz Feb 7, 2025
e199b8b
Do not use `_` + capital letter in new code as it is also UB.
picnixz Feb 8, 2025
271a75c
Merge branch 'main' into fix/ubsan/json-111178
encukou Feb 17, 2025
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Do not use _ + capital letter in new code as it is also UB.
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@picnixz
picnixz committed Feb 8, 2025
commit e199b8b4e83201164b6e0ca1487717b670be0c49
16 changes: 8 additions & 8 deletions Modules/_json.c
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Original file line number Diff line number Diff line change
Expand Up @@ -27,7 +27,7 @@ typedef struct _PyScannerObject {
PyObject *parse_constant;
} PyScannerObject;

#define _PyScannerObject_CAST(op) ((PyScannerObject *)(op))
#define PyScannerObject_CAST(op) ((PyScannerObject *)(op))

static PyMemberDef scanner_members[] = {
{"strict", Py_T_BOOL, offsetof(PyScannerObject, strict), Py_READONLY, "strict"},
Expand All @@ -53,7 +53,7 @@ typedef struct _PyEncoderObject {
PyCFunction fast_encode;
} PyEncoderObject;

#define _PyEncoderObject_CAST(op) ((PyEncoderObject *)(op))
#define PyEncoderObject_CAST(op) ((PyEncoderObject *)(op))

static PyMemberDef encoder_members[] = {
{"markers", _Py_T_OBJECT, offsetof(PyEncoderObject, markers), Py_READONLY, "markers"},
Expand Down Expand Up @@ -640,7 +640,7 @@ scanner_dealloc(PyObject *self)
static int
scanner_traverse(PyObject *op, visitproc visit, void *arg)
{
PyScannerObject *self = _PyScannerObject_CAST(op);
PyScannerObject *self = PyScannerObject_CAST(op);
Py_VISIT(Py_TYPE(self));
Py_VISIT(self->object_hook);
Py_VISIT(self->object_pairs_hook);
Expand All @@ -653,7 +653,7 @@ scanner_traverse(PyObject *op, visitproc visit, void *arg)
static int
scanner_clear(PyObject *op)
{
PyScannerObject *self = _PyScannerObject_CAST(op);
PyScannerObject *self = PyScannerObject_CAST(op);
Py_CLEAR(self->object_hook);
Py_CLEAR(self->object_pairs_hook);
Py_CLEAR(self->parse_float);
Expand Down Expand Up @@ -1145,7 +1145,7 @@ scanner_call(PyObject *self, PyObject *args, PyObject *kwds)
if (memo == NULL) {
return NULL;
}
rval = scan_once_unicode(_PyScannerObject_CAST(self),
rval = scan_once_unicode(PyScannerObject_CAST(self),
memo, pystr, idx, &next_idx);
Py_DECREF(memo);
if (rval == NULL)
Expand Down Expand Up @@ -1362,7 +1362,7 @@ encoder_call(PyObject *op, PyObject *args, PyObject *kwds)
static char *kwlist[] = {"obj", "_current_indent_level", NULL};
PyObject *obj;
Py_ssize_t indent_level;
PyEncoderObject *self = _PyEncoderObject_CAST(op);
PyEncoderObject *self = PyEncoderObject_CAST(op);

if (!PyArg_ParseTupleAndKeywords(args, kwds, "On:_iterencode", kwlist,
&obj, &indent_level))
Expand Down Expand Up @@ -1842,7 +1842,7 @@ encoder_dealloc(PyObject *self)
static int
encoder_traverse(PyObject *op, visitproc visit, void *arg)
{
PyEncoderObject *self = _PyEncoderObject_CAST(op);
PyEncoderObject *self = PyEncoderObject_CAST(op);
Py_VISIT(Py_TYPE(self));
Py_VISIT(self->markers);
Py_VISIT(self->defaultfn);
Expand All @@ -1856,7 +1856,7 @@ encoder_traverse(PyObject *op, visitproc visit, void *arg)
static int
encoder_clear(PyObject *op)
{
PyEncoderObject *self = _PyEncoderObject_CAST(op);
PyEncoderObject *self = PyEncoderObject_CAST(op);
/* Deallocate Encoder */
Py_CLEAR(self->markers);
Py_CLEAR(self->defaultfn);
Expand Down