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gh-111178: fix UBSan failures in Modules/_pickle.c #129787

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Merged
encukou merged 10 commits into from
Feb 20, 2025
+62 −39
Merged

gh-111178: fix UBSan failures in Modules/_pickle.c #129787

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47cddff
fix UBSan failures for `Pdata`
picnixz Jan 25, 2025
61da4f2
fix UBSan failures for `PicklerObject`
picnixz Jan 25, 2025
d1e782c
fix UBSan failures for `UnpicklerObject`
picnixz Jan 25, 2025
0b1d726
fix UBSan failures for `PicklerMemoProxyObject`
picnixz Jan 25, 2025
e3bcf30
fix UBSan failures for `UnpicklerMemoProxyObject`
picnixz Jan 25, 2025
fc28046
indicate safe fast cast to avoid redundant future checks
picnixz Jan 25, 2025
d019c95
use semantically correct parameter names
picnixz Feb 6, 2025
8c290f6
Merge remote-tracking branch 'upstream/main' into fix/ubsan/pickle-11…
picnixz Feb 7, 2025
2e46447
Do Do not use `_` + capital letter in new code as it is also UB.
picnixz Feb 8, 2025
045b936
Merge branch 'main' into fix/ubsan/pickle-111178
encukou Feb 17, 2025
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fix UBSan failures for Pdata
  • Loading branch information
@picnixz
picnixz committed Jan 25, 2025
commit 47cddff3315d899828778ffcb1dc1b479265865e
9 changes: 6 additions & 3 deletions Modules/_pickle.c
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Original file line number Diff line number Diff line change
Expand Up @@ -410,24 +410,27 @@ typedef struct {
Py_ssize_t allocated; /* number of slots in data allocated */
} Pdata;

#define _Pdata_CAST(op) ((Pdata *)(op))

static int
Pdata_traverse(Pdata *self, visitproc visit, void *arg)
Pdata_traverse(PyObject *self, visitproc visit, void *arg)
{
Py_VISIT(Py_TYPE(self));
return 0;
}

static void
Pdata_dealloc(Pdata *self)
Pdata_dealloc(PyObject *op)
{
Pdata *self = _Pdata_CAST(op);
PyTypeObject *tp = Py_TYPE(self);
PyObject_GC_UnTrack(self);
Py_ssize_t i = Py_SIZE(self);
while (--i >= 0) {
Py_DECREF(self->data[i]);
}
PyMem_Free(self->data);
tp->tp_free((PyObject *)self);
tp->tp_free(self);
Py_DECREF(tp);
}

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