netdev - Re: [PATCH net] net: vxlan: fix crash when interface is created with no group

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Date:	Thu, 20 Mar 2014 14:47:25 -0600
From:	David Stevens <dlstevens@...ibm.com>
To:	David Miller <davem@...emloft.net>
Cc:	mike.rapoport@...ellosystems.com, netdev@...r.kernel.org
Subject: Re: [PATCH net] net: vxlan: fix crash when interface is created with no
 group



>From: David Miller 

>Any objections to this? I think it maintains the pre-ipv6-support
>behavior. I know there may be some concerns about supporting
>multiple
>families on the same socket, but I'm not so sure the code is able to
>support that right now anyways.

I'm ok with the idea of determining the AF from the socket -- mixed
support, if useful, can be added later. But the patch needs to then
check and drop packets encapsulated with the wrong address family.

And it still shouldn't assume !v4 means v6.

[apologies for spacing; doing this from a web browser...]
So, I think we need something like:

     if (vs->family == AF_INET && skb->protocol == ntohs(ETH_P_IP)) {
        ....
     } else if (vs->family == AF_INET6 && skb->protocol == ntohs(ETH_P_IPV6)) {
        ...
     } else
           goto drop


                                                          +-DLS

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