blob: f3ca35016da08a1b47d4df2571b322af4f12414f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
"""
_PyType_Lookup() returns a borrowed reference.
This attacks PyObject_GenericSetAttr().
NB. on my machine this crashes in 2.5 debug but not release.
"""
class A(object):
pass
class B(object):
def __del__(self):
print("hi")
del C.d
class D(object):
def __set__(self, obj, value):
self.hello = 42
class C(object):
d = D()
def g():
pass
c = C()
a = A()
a.cycle = a
a.other = B()
lst = [None] * 1000000
i = 0
del a
while 1:
c.d = 42 # segfaults in PyMethod_New(im_func=D.__set__, im_self=d)
lst[i] = c.g # consume the free list of instancemethod objects
i += 1
|
