On Wed, 2018-02-14 at 12:13 +0100, Paolo Abeni wrote:
> syzbot reported a division by 0 bug in the netfilter nat code:


> Adding the relevant check at parse time could break existing
> setup, moreover we would need to read/write such values atomically
> to avoid possible transient negative ranges at update time.

I do not quite follow why it is so hard to add a check at parse time.

Breaking buggy setups would not be a concern I think.

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