netdev - binding UDP port 0 with SO

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Message-ID: <CAEZM=bNdyZoTiGYwNM_3v+ro7dEn0q9aTo4040tBDqDSH3HOXg@mail.gmail.com>
Date:	Wed, 1 Aug 2012 13:36:49 +0200
From:	"Tobias S. Josefowitz" <t.josefowitz@...il.com>
To:	netdev@...r.kernel.org
Subject: binding UDP port 0 with SO_REUSEADDR

Hey all,

I recently noticed that binding UDP port 0 with SO_REUSEADDR yields
unexpected results for me - the kernel occasionally gives out UDP
ports used by other processes, if they were bound with SO_REUSEADDR,
too.

I did some digging, it seems that
f24d43c07e208372aa3d3bff419afbf43ba87698 introduced this behaviour.
I'm not at all sure if this could/should be called a bug, but I need
to say, it was severly unexpected at my side, and that probably goes
for others, too.

Just bringing this to your attention, I have no suggestions on it whatsoever.

Best,

Tobi
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