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Re: building an online judge to evaluate Python programs

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  Re: building an online judge to evaluate Python programs Modulok <modulok@gmail.com> - 2013-09-23 11:32 -0600

#54654 — Re: building an online judge to evaluate Python programs

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>
>
> If you want to run untrusted Python code and prevent malice (or stupidity)
> from harming you, you need OS-level protection.
>
>
Agreed. Just for fun here's a simple example of what could be an honest
mistake
that consumes all physical memory and swap. A well behaved kernel will kill
the
process eventually when it can no longer allocate memory, but not before
bringing the machine to its knees:

    class Foo(object):
        def __init__(self):
            self.x = 1
        def __iter__(self):
            return self
        def next(self):
            self.x += 1
            # Oops. In a well behaved iterator this should eventually
            # raise 'StopIteration'. I knew I forgot something.


    a = Foo()
    b = list(a)


-Modulok-

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