netdev - Re: v3 [PATCH net-next 4/7] ipv6: Check return of dev_set

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Message-ID: <486B7A7D.2020700@trash.net>
Date:	Wed, 02 Jul 2008 14:54:21 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	Wang Chen <wangchen@...fujitsu.com>
CC:	"David S. Miller" <davem@...emloft.net>,
	NETDEV <netdev@...r.kernel.org>,
	YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
Subject: Re: v3 [PATCH net-next 4/7] ipv6: Check return of dev_set_allmulti

Wang Chen wrote:
> v2->v3:
>   Do unwind job when error happen.
> 
> diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
> index 1479618..ba763b8 100644
> --- a/net/ipv6/ip6mr.c
> +++ b/net/ipv6/ip6mr.c
> @@ -461,6 +461,13 @@ failure:
>  	unregister_netdevice(dev);
>  	return NULL;
>  }
> +
> +static void ip6mr_unreg_vif(struct net_device *dev)
> +{
> +	dev_close(dev);
> +	unregister_netdevice(dev);

dev_close is already performed by unregister_netdevice.

> +	free_netdev(dev);

This is a double free, the device uses free_netdev as destructor.
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