[issue20160] broken ctypes calling convention on MSVC / 64-bit Windows (large structs)

[Steve Dower]

Steve Dower added the comment:

I'd also suggest that this is potentially exploitable (if the Python code calling into ctypes is already vulnerable - I don't think you could reasonably manufacture an exploit simply from this bug) and it should probably go into all active security branches. I think that's what the current selection represents, but I don't remember where 3.3 is at right now.

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<http://bugs.python.org/issue20160>
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