Re: net: integer overflow in ip_idents_reserve

[Eric Dumazet]

On Tue, 2014-12-16 at 16:19 -0500, Sasha Levin wrote:
> Hi Eric,
> 
> While fuzzing with trinity on a -next kernel with the undefined behaviour
> sanitizer path, I've observed the following warning in code which was
> introduced in 04ca6973f7 ("ip: make IP identifiers less predictable"):

This is a false positive.

We don't really care of the value if (now - old) is too big :

No packet was sent recently, so IP ID being X or Y is not a concern.



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