netdev - Re: [PATCH net-next 3/8] net: bridge: vlan: add rtm definitions and dump support

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Date:   Tue, 14 Jan 2020 08:34:05 -0700
From:   David Ahern <dsahern@...il.com>
To:     Jakub Kicinski <kuba@...nel.org>,
        Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
Cc:     netdev@...r.kernel.org, roopa@...ulusnetworks.com,
        davem@...emloft.net, bridge@...ts.linux-foundation.org
Subject: Re: [PATCH net-next 3/8] net: bridge: vlan: add rtm definitions and
 dump support

On 1/14/20 6:55 AM, Jakub Kicinski wrote:
> On Mon, 13 Jan 2020 17:52:28 +0200, Nikolay Aleksandrov wrote:
>> +static int br_vlan_rtm_dump(struct sk_buff *skb, struct netlink_callback *cb)
>> +{
>> +	int idx = 0, err = 0, s_idx = cb->args[0];
>> +	struct net *net = sock_net(skb->sk);
>> +	struct br_vlan_msg *bvm;
>> +	struct net_device *dev;
>> +
>> +	if (cb->nlh->nlmsg_len < nlmsg_msg_size(sizeof(*bvm))) {
> 
> I wonder if it'd be useful to make this a strict != check? At least
> when strict validation is on? Perhaps we'll one day want to extend 
> the request?
> 

+1. All new code should be using the strict checks.