netdev - Re: Linux sends IPv6 NS packets with the link-local address

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20131107005615.GA21230@sesse.net>
Date:	Thu, 7 Nov 2013 01:56:15 +0100
From:	"Steinar H. Gunderson" <sgunderson@...foot.com>
To:	netdev@...r.kernel.org, ayourtch@...il.com
Subject: Re: Linux sends IPv6 NS packets with the link-local address

On Thu, Nov 07, 2013 at 01:46:11AM +0100, Hannes Frederic Sowa wrote:
> Problem was, if we enqueue a packet to the resolving queue we use those
> packets source address as the address we use as the source address. This
> patch chooses the last enqueued skb's source address to do the resolving
> thus switching over to a global address much more early (hopefully). I
> have seen this problem with routers doing uRPF on the source address of
> arp packets, too.
> 
> Does this happen when you configure addresses? Do your addresses have
> a short lifetime advertised by radvd etc?

There are no autoconfigured addresses on the machine; statically set plus
link-layer only. It does _serve_ RA for another VLAN, though (it does
802.1q, some tunnels, and some BGP).

/* Steinar */
-- 
Homepage: http://www.sesse.net/
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html