netdev - Re: [PATCH][RESEND 3] IPv6: 6rd tunnel mode

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Date:	Wed, 23 Sep 2009 08:07:33 +0200 (CEST)
From:	Alexandre Cassen <acassen@...ebox.fr>
To:	Eric Dumazet <eric.dumazet@...il.com>
cc:	netdev@...r.kernel.org
Subject: Re: [PATCH][RESEND 3] IPv6: 6rd tunnel mode



On Wed, 23 Sep 2009, Eric Dumazet wrote:
>> +#ifdef CONFIG_IPV6_SIT_6RD
>> +	case SIOCGET6RD:
>> +		err = -EINVAL;
>> +		if (dev == sitn->fb_tunnel_dev)
>> +			goto done;
>> +		err = -ENOENT;
>> +		if (!(t = netdev_priv(dev)))
>> +			goto done;
>
>> +		memcpy(&ip6rd, &t->ip6rd_prefix, sizeof(ip6rd));
>
> Just wondering why you need a temporary ip6rd here,
> why dont you copy_to_user(ifr->ifr_ifru.ifru_data, &t->ip6rd_prefix, sizeof(ip6rd)); ?
>
>> +		if (copy_to_user(ifr->ifr_ifru.ifru_data, &ip6rd, sizeof(ip6rd)))
>> +			err = -EFAULT;
>> +		else
>> +			err = 0;
>> +		break;

agreed. will fix.
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