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bpo-25455: Fixed crashes in repr of recursive buffered file-like objects. (#514)

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This commit is contained in:
Serhiy Storchaka 2017-03-19 19:25:29 +02:00 • committed by GitHub
parent 77ed11552d
commit a5af6e1af7
6 changed files with 74 additions and 9 deletions
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23
Modules/_io/textio.c
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@ -2483,6 +2483,7 @@ static PyObject *
textiowrapper_repr(textio *self)
{
PyObject *nameobj, *modeobj, *res, *s;
int status;
CHECK_INITIALIZED(self);
@ -2490,6 +2491,15 @@ textiowrapper_repr(textio *self)
if (res == NULL)
return NULL;
status = Py_ReprEnter((PyObject *)self);
if (status != 0) {
if (status > 0) {
PyErr_Format(PyExc_RuntimeError,
"reentrant call inside %s.__repr__",
Py_TYPE(self)->tp_name);
}
goto error;
}
nameobj = _PyObject_GetAttrId((PyObject *) self, &PyId_name);
if (nameobj == NULL) {
if (PyErr_ExceptionMatches(PyExc_Exception))
@ -2504,7 +2514,7 @@ textiowrapper_repr(textio *self)
goto error;
PyUnicode_AppendAndDel(&res, s);
if (res == NULL)
return NULL;
goto error;
}
modeobj = _PyObject_GetAttrId((PyObject *) self, &PyId_mode);
if (modeobj == NULL) {
@ -2520,14 +2530,21 @@ textiowrapper_repr(textio *self)
goto error;
PyUnicode_AppendAndDel(&res, s);
if (res == NULL)
return NULL;
goto error;
}
s = PyUnicode_FromFormat("%U encoding=%R>",
res, self->encoding);
Py_DECREF(res);
if (status == 0) {
Py_ReprLeave((PyObject *)self);
}
return s;
error:
error:
Py_XDECREF(res);
if (status == 0) {
Py_ReprLeave((PyObject *)self);
}
return NULL;
}