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From: "Gao Feng" <gfree.wind@foxmail.com>
References: <1493121800-28066-1-git-send-email-gfree.wind@foxmail.com>
 <1756616.320MP6AHYH@bentobox>
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Date: Wed, 26 Apr 2017 08:41:30 +0800
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Subject: Re: [B.A.T.M.A.N.] [PATCH net] net: batman-adv: Fix possible
	memleaks when fail to register_netdevice
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To: 'Sven Eckelmann' <sven@narfation.org>, b.a.t.m.a.n@lists.open-mesh.org
Cc: mareklindner@neomailbox.ch, netdev@vger.kernel.org, a@unstable.cc, 'Gao Feng' <fgao@ikuai8.com>, davem@davemloft.net

> From: Sven Eckelmann [mailto:sven@narfation.org]
> Sent: Tuesday, April 25, 2017 9:53 PM
> On Dienstag, 25. April 2017 20:03:20 CEST gfree.wind@foxmail.com wrote:
> > From: Gao Feng <fgao@ikuai8.com>
> >
> > Because the func batadv_softif_init_late allocate some resources and
> > it would be invoked in register_netdevice. So we need to invoke the
> > func batadv_softif_free instead of free_netdev to cleanup when fail to
> > register_netdevice.
> 
> I could be wrong, but shouldn't the destructor be replaced with
free_netdevice
> and the batadv_softif_free (without the free_netdev) used as ndo_uninit?
The
> line you've changed should then be kept as free_netdevice.
> 
> At least this seems to be important when using rtnl_newlink() instead of
the
> legacy sysfs netdev stuff from batman-adv. rtnl_newlink() would also only
call
> free_netdevice and thus also not run batadv_softif_free. This seems to be
only
> fixable by calling ndo_uninit.
> 
> Kind regards,
> 	Sven

Sorry, I don't get you.
The net_dev is created in this func batadv_softif_create.
Why couldn't invoke batadv_softif_free to cleanup when fail to
register_netdevice?

Best Regards
Feng