Edit report at https://bugs.php.net/bug.php?id=49664&edit=1
ID: 49664
Updated by: cataphr...@php.net
Reported by: patrik dot lermon at gmail dot com
Summary: Clone causes Segmentation fault
-Status: Not a bug
+Status: Re-Opened
Type: Bug
Package: Reproducible crash
Operating System: Linux
PHP Version: 5.*, 6 (2009-09-20)
Block user comment: N
Private report: N
New Comment:
Still present in trunk; reopening.
Previous Comments:
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[2013-01-28 13:43:17] cf0hay at gmail dot com
Same az OP (with PHP 5.4.8):
$ php a.php
a before cloning:
a: [- >]
Segmentation fault
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[2013-01-23 12:07:28] patrik dot lermon at gmail dot com
And what do you get when you try with the reproduce code?
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[2013-01-23 11:27:55] cf0hay at gmail dot com
> Infinite recursion crashes. There's no fix for that.
Err, what?
$ php -r 'function a(){ a(); } a();'
PHP Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to
allocate 130968 bytes) in Command line code on line 1
Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to
allocate
130968 bytes) in Command line code on line 1
This is the intended behaviour on infinite recursion, not a segmentation fault.
I wouldn't be surprised this could lead a security problem rather just a simple
crash.
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[2012-12-18 23:53:05] kurt at kurtrose dot com
Python handles this kind of recursion fine:
class F(object):
def __repr__(self): return self.__repr__()
>>> repr(F())
File "<stdin>", line 2, in __repr__
File "<stdin>", line 2, in __repr__
...
File "<stdin>", line 2, in __repr__
File "<stdin>", line 2, in __repr__
RuntimeError: maximum recursion depth exceeded
No segfault.
------------------------------------------------------------------------
[2009-10-19 15:31:17] patrik dot lermon at gmail dot com
I don't agree. Perhaps my knowledge is not detailed enough, but an infinte
recursion should:
a) run out of memory and die, or
b) detect the recursion and die.
In both these cases PHP should die in a controlled manner, not segfault.
My understanding is that segfault is never ok - that means the code is faulty.
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