netdev - Re: [PATCH net 1/2] net: bridge: use nla_total_size_64bit() in br_get_linkxstats

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Message-ID: <8d6dc3dd-16cb-28dc-7870-29ff1708ca96@nvidia.com>
Date:   Tue, 5 Oct 2021 12:03:37 +0300
From:   Nikolay Aleksandrov <nikolay@...dia.com>
To:     Eric Dumazet <eric.dumazet@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev <netdev@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Vivien Didelot <vivien.didelot@...il.com>
Subject: Re: [PATCH net 1/2] net: bridge: use nla_total_size_64bit() in
 br_get_linkxstats_size()

On 05/10/2021 04:05, Eric Dumazet wrote:
> From: Eric Dumazet <edumazet@...gle.com>
> 
> bridge_fill_linkxstats() is using nla_reserve_64bit().
> 
> We must use nla_total_size_64bit() instead of nla_total_size()
> for corresponding data structure.
> 
> Fixes: 1080ab95e3c7 ("net: bridge: add support for IGMP/MLD stats and export them via netlink")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Cc: Nikolay Aleksandrov <nikolay@...dia.com>
> Cc: Vivien Didelot <vivien.didelot@...il.com>
> ---
>  net/bridge/br_netlink.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
> index 6c58fc14d2cb2de8bcd8364fc5e766247aba2e97..29b8f6373fb925d48ce876dcda7fccc10539240a 100644
> --- a/net/bridge/br_netlink.c
> +++ b/net/bridge/br_netlink.c
> @@ -1666,7 +1666,7 @@ static size_t br_get_linkxstats_size(const struct net_device *dev, int attr)
>  	}
>  
>  	return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
> -	       nla_total_size(sizeof(struct br_mcast_stats)) +
> +	       nla_total_size_64bit(sizeof(struct br_mcast_stats)) +
>  	       nla_total_size(0);
>  }
>  
> 

Good catch. Thanks,
Acked-by: Nikolay Aleksandrov <nikolay@...dia.com>