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Date: Fri, 08 Oct 2010 19:29:06 +0200 From: Daniel Lezcano <daniel.lezcano@...e.fr> To: "Eric W. Biederman" <ebiederm@...ssion.com> CC: Hans Schillstrom <hans.schillstrom@...csson.com>, "netdev@...r.kernel.org" <netdev@...r.kernel.org> Subject: Re: BUG ? ipip unregister_netdevice_many() On 10/08/2010 06:58 PM, Eric W. Biederman wrote: > Daniel Lezcano<daniel.lezcano@...e.fr> writes: > > >> On 10/08/2010 05:53 PM, Daniel Lezcano wrote: >> >>> On 10/08/2010 02:28 PM, Hans Schillstrom wrote: >>> >>>> Hi Eric, >>>> Any advice how to trace this down ? >>>> This rollback_registered_many() seems to have on the lists before... >>>> All IPv4 and IPv6 tunnels causes this crash, all you have to do is >>>> load the tunnel module(s) >>>> enter a new ns and exit from it. >>>> >>>> Have not tested any more devices than tunnels, >>>> I did an "ip link delete" on my macvlans before exiting the ns. >>>> >>> Ah ! I succeed to reproduce it. >>> It does not appear immediately in fact. >>> >>> I am trying to simplify the configuration but I am falling in the bug I >>> talked about in the previous email. >>> >> Ok, so after investigating, we just need a macvlan and specify an ipv6 address >> for it (inside a new netns of course), and the loopback is not released. I >> compiled out the tunnels, so they are not related to this problem I think. >> >> That reduces the scope of investigation :) >> > This reproduces the unable to free nedevice problem? Or the bad > pointer in macvlan_close problem? > The free netdevice problem. For the macvlan problem, you have to create 2 macvlans on the *same* physical interface, move them to the network namespace and then exit this net_ns. You have to repeat this operation several times because that happen randomly after a few iterations. -- 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
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