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From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Sun, 13 Nov 2016 01:43:08 +0100
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To: David Ahern <dsa@cumulusnetworks.com>
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Cc: Netdev <netdev@vger.kernel.org>,
 Hannes Frederic Sowa <hannes@stressinduktion.org>,
 LKML <linux-kernel@vger.kernel.org>,
 WireGuard mailing list <wireguard@lists.zx2c4.com>,
 YOSHIFUJI Hideaki <hideaki.yoshifuji@miraclelinux.com>
Subject: Re: [WireGuard] Source address fib invalidation on IPv6
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On Sat, Nov 12, 2016 at 8:08 PM, Jason A. Donenfeld <Jason@zx2c4.com> wrote:
>> Gotcha. I don't see any checks that the saddr is valid similar to what IPv4 does.
>>
>> I think the right place to add a check is in ip6_dst_lookup_tail():
>>     if (!ipv6_addr_any(&fl6->saddr)) {
>>         // saddr is valid for L3 domain
>>     }
>
> Right. It should probably do the check here, and return
> ERR_PTR(-EINVAL), the same as the v4 version, so that ret codes can be
> checked consistently.
>
> Thanks for looking into this. If you're backed up and would like me to
> submit a patch, just let me know, and I'll give it my best shot.

In perusing through the v6 FIB code, I don't even see an analog of
__ip_dev_find... Hm?