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zlib bombs #26

@bsutton

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@bsutton

I'm concerned about files with very low entropy being decompressed into very large in memory objecst.

This might not even be an intended bomb.

I feel like we building a frame we should have a target frame size but also an upper limit on the size of un compressed data that we attempt
to place into a frame.
If we do this we also get some protection from zlib bombs as we will refurse to de-compress a frame beyound the targeted upper limit size - because that represents and invalid file.

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