netdev - Re: [PATCH net] ipv6: seg6_genl_set_tunsrc() must check kmemdup() return value

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Date:   Fri, 20 Jan 2017 17:06:40 +0100
From:   David Lebrun <david.lebrun@...ouvain.be>
To:     Eric Dumazet <eric.dumazet@...il.com>,
        David Miller <davem@...emloft.net>
CC:     netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH net] ipv6: seg6_genl_set_tunsrc() must check kmemdup()
 return value

On 01/20/2017 04:57 PM, Eric Dumazet wrote:
> From: Eric Dumazet <edumazet@...gle.com>
> 
> seg6_genl_get_tunsrc() and set_tun_src() do not handle tun_src being
> possibly NULL, so we must check kmemdup() return value and abort if
> it is NULL
> 
> Fixes: 915d7e5e5930 ("ipv6: sr: add code base for control plane support of SR-IPv6")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Cc: David Lebrun <david.lebrun@...ouvain.be>
> ---
>  net/ipv6/seg6.c |    2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/net/ipv6/seg6.c b/net/ipv6/seg6.c
> index b172d85c650a376f541ea05d72046c76b8404303..a855eb325b030a666fe92c56a2d432c77d9dfe7a 100644
> --- a/net/ipv6/seg6.c
> +++ b/net/ipv6/seg6.c
> @@ -176,6 +176,8 @@ static int seg6_genl_set_tunsrc(struct sk_buff *skb, struct genl_info *info)
>  
>  	val = nla_data(info->attrs[SEG6_ATTR_DST]);
>  	t_new = kmemdup(val, sizeof(*val), GFP_KERNEL);
> +	if (!t_new)
> +		return -ENOMEM;
>  
>  	mutex_lock(&sdata->lock);
>  
> 
> 

Thanks :)

Acked-by: David Lebrun <david.lebrun@...ouvain.be>


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