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[Python-Dev] Challenge: Please break this! (a.k.a restricted mode revisited)

Nikolaus Rath Nikolaus at rath.org
Sun Apr 10 17:08:16 EDT 2016 
On Apr 10 2016, Jon Ribbens <jon+python-dev at unequivocal.co.uk> wrote:
> On Sat, Apr 09, 2016 at 02:43:19PM +0200, Victor Stinner wrote:
>>    Please don't loose time trying yet another sandbox inside CPython. It's
>>    just a waste of time. It's broken by design.
>> 
>>    Please read my email about my attempt (pysandbox):
>>    https://lwn.net/Articles/574323/
>> 
>>    And the LWN article:
>>    https://lwn.net/Articles/574215/
>> 
>>    There are a lot of safe ways to run CPython inside a sandbox (and not rhe
>>    opposite).
>> 
>>    I started as you, add more and more things to a blacklist, but it doesn't
>>    work.
>
> That's the opposite of my approach though - I'm starting small and
> adding things, not starting with everything and removing stuff.

That contradicts what you said in another mail:


On Apr 08 2016, Jon Ribbens <jon+python-dev at unequivocal.co.uk> wrote:
> Ah, I've not used Python 3.5, and I can't find any documentation on
> this cr_frame business, but I've added cr_frame and f_back to the
> disallowed attributes list.


Best,
-Nikolaus

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