netdev - Re: [PATCH net-next 02/13] bridge: mcast: Account for missing attributes

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Date: Tue, 17 Oct 2023 12:05:14 +0300
From: Nikolay Aleksandrov <razor@...ckwall.org>
To: Ido Schimmel <idosch@...dia.com>, netdev@...r.kernel.org,
 bridge@...ts.linux-foundation.org
Cc: davem@...emloft.net, kuba@...nel.org, edumazet@...gle.com,
 pabeni@...hat.com, roopa@...dia.com, mlxsw@...dia.com
Subject: Re: [PATCH net-next 02/13] bridge: mcast: Account for missing
 attributes

On 10/16/23 16:12, Ido Schimmel wrote:
> The 'MDBA_MDB' and 'MDBA_MDB_ENTRY' nest attributes are not accounted
> for when calculating the size of MDB notifications. Add them along with
> comments for existing attributes.
> 
> Signed-off-by: Ido Schimmel <idosch@...dia.com>
> ---
>   net/bridge/br_mdb.c | 15 +++++++++++----
>   1 file changed, 11 insertions(+), 4 deletions(-)
> 
> diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c
> index fb58bb1b60e8..08de94bffc12 100644
> --- a/net/bridge/br_mdb.c
> +++ b/net/bridge/br_mdb.c
> @@ -452,11 +452,18 @@ static int nlmsg_populate_mdb_fill(struct sk_buff *skb,
>   
>   static size_t rtnl_mdb_nlmsg_size(struct net_bridge_port_group *pg)
>   {
> -	size_t nlmsg_size = NLMSG_ALIGN(sizeof(struct br_port_msg)) +
> -			    nla_total_size(sizeof(struct br_mdb_entry)) +
> -			    nla_total_size(sizeof(u32));
>   	struct net_bridge_group_src *ent;
> -	size_t addr_size = 0;
> +	size_t nlmsg_size, addr_size = 0;
> +
> +	nlmsg_size = NLMSG_ALIGN(sizeof(struct br_port_msg)) +
> +		     /* MDBA_MDB */
> +		     nla_total_size(0) +
> +		     /* MDBA_MDB_ENTRY */
> +		     nla_total_size(0) +
> +		     /* MDBA_MDB_ENTRY_INFO */
> +		     nla_total_size(sizeof(struct br_mdb_entry)) +
> +		     /* MDBA_MDB_EATTR_TIMER */
> +		     nla_total_size(sizeof(u32));
>   
>   	if (!pg)
>   		goto out;

Acked-by: Nikolay Aleksandrov <razor@...ckwall.org>