linux-kernel - Re: [PATCH] ipip, sit: copy parms.name after register

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Message-ID: <20111207201610.7cc9714a@nehalam.linuxnetplumber.net>
Date:	Wed, 7 Dec 2011 20:16:10 -0800
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Ted Feng <artisdom@...il.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Jiri Pirko <jpirko@...hat.com>,
	Josh Boyer <jwboyer@...hat.com>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ipip, sit: copy parms.name after register_netdevice

On Thu, 8 Dec 2011 11:35:15 +0800
Ted Feng <artisdom@...il.com> wrote:

> From: Ted Feng <artisdom@...il.com>
> Same fix as 731abb9cb2 for ipip and sit tunnel.
> Commit 1c5cae815d removed an explicit call to dev_alloc_name in
> ipip_tunnel_locate and ipip6_tunnel_locate, because register_netdevice
> will now create a valid name. However the tunnel keeps a copy of the
> name in the private parms structure.
> 
> This shows up if you do a simple tunnel add, followed by a tunnel show:
> 

Ok, but keeping a private copy is not a good idea, since tunnel
can be renamed.
  ip li set dev tun0 name tunnel-of-love

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