Ok, thanks!
Can you check the size of all the Tensors that are in your model state dict and report them here? I guess one of them is going to be huge?
Note that if you have a case where you can do
t = torch.rand(your_tensor_size)
torch.save(t, "my_path.pth")

it would be super helpful and we should open an issue on github.
From looking from afar, it looks like the issue is with some integer overflow because some of your objects are too big. But if you have a simple repro, we can verify that!