full-disclosure - ifIndex overflow (Linux Kernel - net/core/dev.c) [maybe offtopic]

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Message-Id: <66EA04F0-BDF6-48C7-AE5E-4F866F3E10CF@preussker.net>
Date: Thu, 7 Feb 2013 20:28:31 +0100
From: Daniel Preussker <daniel@...ussker.net>
To: full-disclosure@...ts.grok.org.uk
Subject: ifIndex overflow (Linux Kernel - net/core/dev.c)
	[maybe offtopic]

Hi,

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?

General question, is this known?

Daniel Preussker

[ Security Consultant, Network & Protocol Security and Cryptography
[ LPI & Novell Certified Linux Engineer and Researcher
[ +49 178 600 96 30
[ Daniel@...ussker.Net
[ http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x87E736968E490AA1

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