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Add some missing NULL checks which trigger crashes on low-memory conditions. 

Found by Victor Stinner. Will backport when 2.5 branch is unfrozen.
This commit is contained in:
Georg Brandl 2007-04-11 17:16:24 +00:00
parent 5bf02cd17f
commit c02e13122b
2 changed files with 10 additions and 0 deletions
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2
Objects/exceptions.c
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@ -33,6 +33,8 @@ BaseException_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
PyBaseExceptionObject *self;
self = (PyBaseExceptionObject *)type->tp_alloc(type, 0);
if (!self)
return NULL;
/* the dict is created on the fly in PyObject_GenericSetAttr */
self->message = self->dict = NULL;

8
Objects/longobject.c
View File

@ -1739,6 +1739,8 @@ long_divrem(PyLongObject *a, PyLongObject *b,
a->ob_digit[size_a-1] < b->ob_digit[size_b-1])) {
/* |a| < |b|. */
*pdiv = _PyLong_New(0);
if (*pdiv == NULL)
return -1;
Py_INCREF(a);
*prem = (PyLongObject *) a;
return 0;
@ -1749,6 +1751,10 @@ long_divrem(PyLongObject *a, PyLongObject *b,
if (z == NULL)
return -1;
*prem = (PyLongObject *) PyLong_FromLong((long)rem);
if (*prem == NULL) {
Py_DECREF(z);
return -1;
}
}
else {
z = x_divrem(a, b, prem);
@ -3204,6 +3210,8 @@ long_coerce(PyObject **pv, PyObject **pw)
{
if (PyInt_Check(*pw)) {
*pw = PyLong_FromLong(PyInt_AS_LONG(*pw));
if (*pw == NULL)
return -1;
Py_INCREF(*pv);
return 0;
}