netdev - ipv6: addrconf_add_mroute() problem with loopback interface.

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>] [day] [month] [year] [list]

Date:	Mon, 05 Dec 2011 10:57:45 +0800
From:	Li Wei <lw@...fujitsu.com>
To:	netdev <netdev@...r.kernel.org>
Subject: ipv6: addrconf_add_mroute() problem with loopback interface.

Hi All,

addrconf_add_mroute() create "default" multicast route for the interface, 
but with loopback interface, there would be some problem:

If we set ipv6 address for the "lo" interface *before* other interfaces, the
function addrconf_add_mroute() will create a "default" multicast route with
error set to ENETUNREACH for "lo" interface.

Later, when we send multicast packet, route subsystem will return this *error*
route, so no multicast packets can go out.

Does somebody can give me some advice that if it's necessary to add default
multicast route for loopback interface?

--
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