netdev - Re: [PATCH net-next 20/20] net/bridge: Update br_mdb

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Date:   Fri, 05 Oct 2018 00:34:45 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     dsahern@...nel.org
Cc:     netdev@...r.kernel.org, christian@...uner.io, jbenc@...hat.com,
        stephen@...workplumber.org, dsahern@...il.com
Subject: Re: [PATCH net-next 20/20] net/bridge: Update br_mdb_dump for
 strict data checking

From: David Ahern <dsahern@...nel.org>
Date: Thu,  4 Oct 2018 14:33:55 -0700

> @@ -162,6 +162,28 @@ static int br_mdb_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
>  	return err;
>  }
>  
> +static int br_mdb_valid_dump_req(const struct nlmsghdr *nlh,
> +				 struct netlink_ext_ack *extack)
> +{
> +	struct br_port_msg *bpm;
> +
> +	if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*bpm))) {
> +		NL_SET_ERR_MSG(extack, "Invalid header");
> +		return -EINVAL;
> +	}
> +	if (bpm->ifindex) {

'bpm' is never initialized.