Full Disclosure: Re: ifIndex overflow (Linux Kernel - net/core/dev.c) [maybe offtopic]

[Valdis.Kletnieks () vt edu]

On Thu, 07 Feb 2013 20:28:31 +0100, Daniel Preussker said:
> I was looking into the net/core/dev.c from the current Kernel (previous
> also have this) and found out that ifIndex gets incremented by an
> endless loop.
>
> After creating 4 billion pseudo-eth devices I finally got it to overflow
> and endless loop, had to kill the kernel - fun right?
I wonder what /proc/slabinfo and related memory statistics looked like after
3.9 billion devices created.  You'll need a fairly beefy box to roll that
counter without OOM'ing the kernel first.

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