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Issue #18560: Fix potential NULL pointer dereference in sum()

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Christian Heimes 2013-07-26 22:49:26 +02:00
parent 9ee5c37c8f
commit 704e2d374f
2 changed files with 7 additions and 0 deletions
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2
Misc/NEWS
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@ -12,6 +12,8 @@ What's New in Python 3.3.3 release candidate 1?
Core and Builtins Core and Builtins
----------------- -----------------
- Issue #18560: Fix potential NULL pointer dereference in sum().
- Issue #15905: Fix theoretical buffer overflow in handling of sys.argv[0], - Issue #15905: Fix theoretical buffer overflow in handling of sys.argv[0],
prefix and exec_prefix if the operation system does not obey MAXPATHLEN. prefix and exec_prefix if the operation system does not obey MAXPATHLEN.

5
Python/bltinmodule.c
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@ -2009,6 +2009,11 @@ builtin_sum(PyObject *self, PyObject *args)
} }
/* Either overflowed or is not an int. Restore real objects and process normally */ /* Either overflowed or is not an int. Restore real objects and process normally */
result = PyLong_FromLong(i_result); result = PyLong_FromLong(i_result);
if (result == NULL) {
Py_DECREF(item);
Py_DECREF(iter);
return NULL;
}
temp = PyNumber_Add(result, item); temp = PyNumber_Add(result, item);
Py_DECREF(result); Py_DECREF(result);
Py_DECREF(item); Py_DECREF(item);