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gh-111178: fix UBSan failures in Modules/_ssl.c #130719

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Merged
encukou merged 10 commits into from
Mar 17, 2025
Merged

gh-111178: fix UBSan failures in Modules/_ssl.c #130719

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801a41c
fix UBSan failures for `PySSLContext`
picnixz Feb 8, 2025
e1c5020
fix UBSan failures for `PySSLSocket`
picnixz Feb 8, 2025
e101a98
fix UBSan failures for `PySSLMemoryBIO`
picnixz Feb 8, 2025
d734c1e
fix UBSan failures for `PySSLSession`
picnixz Feb 8, 2025
fe9f918
Do not use `_` + capital letter in cast macros as it is also UB.
picnixz Feb 8, 2025
9a88242
Merge remote-tracking branch 'upstream/main' into fix/ubsan/ssl-111178
picnixz Mar 1, 2025
58d5d42
Merge remote-tracking branch 'upstream/main' into fix/ubsan/ssl-111178
picnixz Mar 1, 2025
62cfada
Assume (and then assert, a bit too late) that left is of the right type
encukou Mar 5, 2025
dc0a521
Victor's review (part 1)
picnixz Mar 16, 2025
9a4079c
Update Modules/_ssl.c
picnixz Mar 16, 2025
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fix UBSan failures for PySSLMemoryBIO
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@picnixz
picnixz committed Feb 8, 2025
commit e101a98ba00594d1681280aba2f3b29d2d5c481d
13 changes: 8 additions & 5 deletions Modules/_ssl.c
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Original file line number Diff line number Diff line change
Expand Up @@ -347,6 +347,8 @@ typedef struct {
int eof_written;
} PySSLMemoryBIO;

#define PySSLMemoryBIO_CAST(op) ((PySSLMemoryBIO *)(op))

typedef struct {
PyObject_HEAD
SSL_SESSION *session;
Expand Down Expand Up @@ -5314,19 +5316,20 @@ _ssl_MemoryBIO_impl(PyTypeObject *type)
}

static int
memory_bio_traverse(PySSLMemoryBIO *self, visitproc visit, void *arg)
memory_bio_traverse(PyObject *op, visitproc visit, void *arg)
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{
Py_VISIT(Py_TYPE(self));
Py_VISIT(Py_TYPE(op));
return 0;
}

static void
memory_bio_dealloc(PySSLMemoryBIO *self)
memory_bio_dealloc(PyObject *op)
{
PySSLMemoryBIO *self = PySSLMemoryBIO_CAST(op);
PyTypeObject *tp = Py_TYPE(self);
PyObject_GC_UnTrack(self);
BIO_free(self->bio);
Py_TYPE(self)->tp_free(self);
(void)BIO_free(self->bio);
tp->tp_free(self);
Py_DECREF(tp);
}

Expand Down