8000 gh-111178: fix UBSan failures in `Modules/_ssl.c` by picnixz · Pull Request #130719 · python/cpython · GitHub
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gh-111178: fix UBSan failures in Modules/_ssl.c #130719

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Merged
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 PySSLSession
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@picnixz
picnixz committed Feb 8, 2025
commit d734c1e8cb8258ff27b25f28f1e3d098de1bda30
14 changes: 10 additions & 4 deletions Modules/_ssl.c
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Original file line number Diff line number Diff line change
Expand Up @@ -355,6 +355,8 @@ typedef struct {
PySSLContext *ctx;
} PySSLSession;

#define PySSLSession_CAST(op) ((PySSLSession *)(op))

static inline _PySSLError _PySSL_errno(int failed, const SSL *ssl, int retcode)
{
_PySSLError err = { 0 };
Expand Down Expand Up @@ -5509,8 +5511,9 @@ static PyType_Spec PySSLMemoryBIO_spec = {
*/

static void
PySSLSession_dealloc(PySSLSession *self)
PySSLSession_dealloc(PyObject *op)
{
PySSLSession *self = PySSLSession_CAST(op);
PyTypeObject *tp = Py_TYPE(self);
/* bpo-31095: UnTrack is needed before calling any callbacks */
PyObject_GC_UnTrack(self);
Expand All @@ -5531,7 +5534,8 @@ PySSLSession_richcompare(PyObject *left, PyObject *right, int op)
}

int result;
PyTypeObject *sesstype = ((PySSLSession*)left)->ctx->state->PySSLSession_Type;
_sslmodulestate *state = get_state_obj(left);
PyTypeObject *sesstype = state->PySSLSession_Type;

if (!Py_IS_TYPE(left, sesstype) || !Py_IS_TYPE(right, sesstype)) {
Py_RETURN_NOTIMPLEMENTED;
Expand Down Expand Up @@ -5581,16 +5585,18 @@ PySSLSession_richcompare(PyObject *left, PyObject *right, int op)
}

static int
PySSLSession_traverse(PySSLSession *self, visitproc visit, void *arg)
PySSLSession_traverse(PyObject *op, visitproc visit, void *arg)
{
PySSLSession *self = PySSLSession_CAST(op);
Py_VISIT(self->ctx);
Py_VISIT(Py_TYPE(self));
return 0;
}

static int
PySSLSession_clear(PySSLSession *self)
PySSLSession_clear(PyObject *op)
{
PySSLSession *self = PySSLSession_CAST(op);
Py_CLEAR(self->ctx);
return 0;
}
Expand Down
0