netdev - Re: [PATCH net-next] net/ipv6: Address checks need to consider the L3 domain

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Date:   Fri, 2 Mar 2018 16:39:48 -0700
From:   David Ahern <dsahern@...il.com>
To:     netdev@...r.kernel.org
Cc:     idosch@...sch.org, David Miller <davem@...emloft.net>
Subject: Re: [PATCH net-next] net/ipv6: Address checks need to consider the L3
 domain

On 3/2/18 4:09 PM, David Ahern wrote:
> diff --git a/net/ipv6/route.c b/net/ipv6/route.c
> index f0ae58424c45..792e7432ba6d 100644
> --- a/net/ipv6/route.c
> +++ b/net/ipv6/route.c
> @@ -2820,9 +2820,9 @@ static struct rt6_info *ip6_route_info_create(struct fib6_config *cfg,
>  		 * prefix route was assigned to, which might be non-loopback.
>  		 */
>  		err = -EINVAL;
> -		if (ipv6_chk_addr_and_flags(net, gw_addr,
> +		if (ipv6_chk_addr_and_flags(net, gw_addr, dev,
>  					    gwa_type & IPV6_ADDR_LINKLOCAL ?
> -					    dev : NULL, 0, 0)) {
> +					    false : true, 0, 0)) {
>  			NL_SET_ERR_MSG(extack, "Invalid gateway address");
>  			goto out;
>  		}

Of course I find this right after sending the patch ....

The route add needs another check to see if it is a local address.
Please drop this one; will send a v2 next week.