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gh-111178: fix UBSan failures in Modules/_bz2module.c #128238

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Merged
merged 1 commit into from
Jan 10, 2025
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gh-111178: fix UBSan failures in Modules/_bz2module.c #128238

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14 changes: 10 additions & 4 deletions Modules/_bz2module.c
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Original file line number Diff line number Diff line change
Expand Up @@ -129,6 +129,9 @@ typedef struct {
PyThread_type_lock lock;
} BZ2Decompressor;

#define _BZ2Compressor_CAST(op) ((BZ2Compressor *)(op))
#define _BZ2Decompressor_CAST(op) ((BZ2Decompressor *)(op))

/* Helper functions. */

static int
Expand Down Expand Up @@ -376,8 +379,9 @@ _bz2_BZ2Compressor_impl(PyTypeObject *type, int compresslevel)
}

static void
BZ2Compressor_dealloc(BZ2Compressor *self)
BZ2Compressor_dealloc(PyObject *op)
{
BZ2Compressor *self = _BZ2Compressor_CAST(op);
BZ2_bzCompressEnd(&self->bzs);
if (self->lock != NULL) {
PyThread_free_lock(self->lock);
Expand All @@ -388,7 +392,7 @@ BZ2Compressor_dealloc(BZ2Compressor *self)
}

static int
BZ2Compressor_traverse(BZ2Compressor *self, visitproc visit, void *arg)
BZ2Compressor_traverse(PyObject *self, visitproc visit, void *arg)
{
Py_VISIT(Py_TYPE(self));
return 0;
Expand Down Expand Up @@ -680,8 +684,10 @@ _bz2_BZ2Decompressor_impl(PyTypeObject *type)
}

static void
BZ2Decompressor_dealloc(BZ2Decompressor *self)
BZ2Decompressor_dealloc(PyObject *op)
{
BZ2Decompressor *self = _BZ2Decompressor_CAST(op);

if(self->input_buffer != NULL) {
PyMem_Free(self->input_buffer);
}
Expand All @@ -697,7 +703,7 @@ BZ2Decompressor_dealloc(BZ2Decompressor *self)
}

static int
BZ2Decompressor_traverse(BZ2Decompressor *self, visitproc visit, void *arg)
BZ2Decompressor_traverse(PyObject *self, visitproc visit, void *arg)
{
Py_VISIT(Py_TYPE(self));
return 0;
Expand Down
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