From: Daniel Lezcano <daniel.lezcano@free.fr>
To: Hans Schillstrom <hans.schillstrom@ericsson.com>
Cc: "netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"Eric W. Biederman" <ebiederm@xmission.com>
Subject: Re: BUG ? ipip unregister_netdevice_many()
Date: Fri, 08 Oct 2010 13:19:08 +0200 [thread overview]
Message-ID: <4CAEFE2C.3010007@free.fr> (raw)
In-Reply-To: <201010071048.12817.hans.schillstrom@ericsson.com>
On 10/07/2010 10:48 AM, Hans Schillstrom wrote:
> Hello
> I'm trying to exit a network name space and it doesn't work (or am I doing something wrong?)
> The only netdevices left are lo and the tunnels ip6tnl0, sit0 and tunl0 when exiting netns.
>
> A netns is created by lxc-execute with two interfaces eth0 eth1 (macvlan)
> (see conf file at the end)
>
> Kernel: net-next-2.6 top from 4 october 2010
>
Hi Hans,
I tried to reproduce your problem but I just get a big kernel crash when
exiting the container :/
The stack is different but it may be related to the same problem.
BUG: unable to handle kernel paging request at ffff88003ba453a0
IP: [<ffffffff813020b6>] macvlan_stop+0x57/0x7d
PGD 180b063 PUD 180f063 PMD 1ffdb067 PTE 3ba45160
Oops: 0002 [#1] DEBUG_PAGEALLOC
last sysfs file: /sys/devices/virtual/net/mc0PyXBA/type
CPU 0
Pid: 5, comm: kworker/u:0 Not tainted 2.6.36-rc7-next-20101007+ #11 /Bochs
RIP: 0010:[<ffffffff813020b6>] [<ffffffff813020b6>] macvlan_stop+0x57/0x7d
RSP: 0018:ffff88003f111c30 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88003bdd1e60 RCX: 000000000000c100
RDX: ffff88003ba453a0 RSI: ffff88003f111d70 RDI: ffffffff810300e5
RBP: ffff88003f111c50 R08: ffff88003f111d70 R09: 00000000000000cc
R10: 0000000000000001 R11: ffff88003f111ba0 R12: ffff88003bdd1800
R13: ffff880039fec800 R14: ffff88003f111d70 R15: ffff88003ba06830
FS: 0000000000000000(0000) GS:ffffffff8181b000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffff88003ba453a0 CR3: 000000003c284000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process kworker/u:0 (pid: 5, threadinfo ffff88003f110000, task
ffff88003f0f20a0)
Stack:
ffffffff81657a10 ffff88003bdd1800 ffffffff81657a10 ffff88003bb23800
<0> ffff88003f111c70 ffffffff81362d09 ffff88003bdd1800 ffff88003f111cf0
<0> ffff88003f111c90 ffffffff81362d31 ffff88003ba067c0 ffff88003bdd1800
Call Trace:
[<ffffffff81362d09>] __dev_close+0x75/0x83
[<ffffffff81362d31>] dev_close+0x1a/0x3f
[<ffffffff81362e38>] rollback_registered_many+0xe2/0x21c
[<ffffffff81362f88>] unregister_netdevice_many+0x16/0x6d
[<ffffffff8136314d>] default_device_exit_batch+0xa7/0xbb
[<ffffffff8135db06>] ops_exit_list+0x4e/0x56
[<ffffffff8135e285>] cleanup_net+0xf5/0x195
[<ffffffff8103e084>] process_one_work+0x25d/0x3e7
[<ffffffff8103e027>] ? process_one_work+0x200/0x3e7
[<ffffffff8135e190>] ? cleanup_net+0x0/0x195
[<ffffffff8103e54a>] worker_thread+0x1b5/0x342
[<ffffffff8103e395>] ? worker_thread+0x0/0x342
[<ffffffff81041495>] kthread+0x7c/0x84
[<ffffffff810034f4>] kernel_thread_helper+0x4/0x10
[<ffffffff814389ba>] ? restore_args+0x0/0x30
[<ffffffff81041419>] ? kthread+0x0/0x84
[<ffffffff810034f0>] ? kernel_thread_helper+0x0/0x10
Code: 00 00 02 74 0b 83 ce ff 4c 89 ef e8 ab eb 05 00 49 8b b4 24 a0 02
00 00 4c 89 ef e8 b9 52 06 00 48 8b 43 18 48 8b 53 20 48 85 c0 <48> 89
02 74 04 48 89 50 08 48 be 00 02 20 00 00 00 ad de 48 89
RIP [<ffffffff813020b6>] macvlan_stop+0x57/0x7d
RSP <ffff88003f111c30>
CR2: ffff88003ba453a0
---[ end trace 05c41c2103816005 ]---
BUG: unable to handle kernel paging request at fffffffffffffff8
IP: [<ffffffff810410bf>] kthread_data+0xb/0x11
PGD 180c067 PUD 180d067 PMD 0
Oops: 0000 [#2] DEBUG_PAGEALLOC
last sysfs file: /sys/devices/virtual/net/mc0PyXBA/type
CPU 0
Pid: 5, comm: kworker/u:0 Tainted: G D
2.6.36-rc7-next-20101007+ #11 /Bochs
RIP: 0010:[<ffffffff810410bf>] [<ffffffff810410bf>] kthread_data+0xb/0x11
RSP: 0018:ffff88003f111868 EFLAGS: 00010096
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88003f111fd8
RDX: ffff88003f0f20a0 RSI: 0000000000000000 RDI: ffff88003f0f20a0
RBP: ffff88003f111868 R08: 0000000000000002 R09: 0000000000000001
R10: 0000000000000246 R11: 09f911029d74e35b R12: 0000000000000000
R13: ffff88003f111948 R14: ffff88003f0c60a0 R15: ffff88003f0f2218
FS: 0000000000000000(0000) GS:ffffffff8181b000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: fffffffffffffff8 CR3: 000000003cb19000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process kworker/u:0 (pid: 5, threadinfo ffff88003f110000, task
ffff88003f0f20a0)
Stack:
ffff88003f111888 ffffffff8103d4e4 ffff88003f111888 ffff88003f0f2310
<0> ffff88003f110010 ffff88003f0f20a0 ffff88003f111fd8 ffff88003f111fd8
Call Trace:
[<ffffffff8103d4e4>] wq_worker_sleeping+0x10/0x76
[<ffffffff81435ffe>] schedule+0xf4/0x405
[<ffffffff8102ebc4>] do_exit+0x647/0x660
[<ffffffff81005ba0>] oops_end+0xb3/0xbb
[<ffffffff8101c6b8>] no_context+0x1f5/0x204
[<ffffffff8101c854>] __bad_area_nosemaphore+0x18d/0x1b0
[<ffffffff8101c885>] bad_area_nosemaphore+0xe/0x10
[<ffffffff8101cb52>] do_page_fault+0x16b/0x34d
[<ffffffff81300a85>] ? ei_set_multicast_list+0x1f/0x3d
[<ffffffff81437f46>] ? trace_hardirqs_off_thunk+0x3a/0x3c
[<ffffffff81438b9f>] page_fault+0x1f/0x30
[<ffffffff810300e5>] ? local_bh_enable_ip+0xb7/0xbd
[<ffffffff813020b6>] ? macvlan_stop+0x57/0x7d
[<ffffffff81362d09>] __dev_close+0x75/0x83
[<ffffffff81362d31>] dev_close+0x1a/0x3f
[<ffffffff81362e38>] rollback_registered_many+0xe2/0x21c
[<ffffffff81362f88>] unregister_netdevice_many+0x16/0x6d
[<ffffffff8136314d>] default_device_exit_batch+0xa7/0xbb
[<ffffffff8135db06>] ops_exit_list+0x4e/0x56
[<ffffffff8135e285>] cleanup_net+0xf5/0x195
[<ffffffff8103e084>] process_one_work+0x25d/0x3e7
[<ffffffff8103e027>] ? process_one_work+0x200/0x3e7
[<ffffffff8135e190>] ? cleanup_net+0x0/0x195
[<ffffffff8103e54a>] worker_thread+0x1b5/0x342
[<ffffffff8103e395>] ? worker_thread+0x0/0x342
[<ffffffff81041495>] kthread+0x7c/0x84
[<ffffffff810034f4>] kernel_thread_helper+0x4/0x10
[<ffffffff814389ba>] ? restore_args+0x0/0x30
[<ffffffff81041419>] ? kthread+0x0/0x84
[<ffffffff810034f0>] ? kernel_thread_helper+0x0/0x10
Code: 5c 41 5d 41 5e c9 c3 90 55 48 8b 04 25 40 a0 81 81 48 8b 80 18 02
00 00 48 89 e5 8b 40 f0 c9 c3 48 8b 87 18 02 00 00 55 48 89 e5 <48> 8b
40 f8 c9 c3 48 89 f0 c1 ee 06 55 89 f6 83 e0 3f 48 c1 e6
RIP [<ffffffff810410bf>] kthread_data+0xb/0x11
RSP <ffff88003f111868>
CR2: fffffffffffffff8
---[ end trace 05c41c2103816006 ]---
Thanks
-- Daniel
> I added some printk's inn ipip.c ipip_exit_net()
> ...
> rtnl_lock();
> printk(KERN_ERR "ipip_exit_net(enter)\n");
> ipip_destroy_tunnels(ipn,&list);
> printk(KERN_ERR "ipip_exit_net(1)\n");
> unregister_netdevice_queue(ipn->fb_tunnel_dev,&list);
> printk(KERN_ERR "ipip_exit_net(2)\n");
> unregister_netdevice_many(&list);
> printk(KERN_ERR "ipip_exit_net(3)\n");
> rtnl_unlock();
> printk(KERN_ERR "ipip_exit_net(exit)\n");
>
>
> Exit steps:
> ===== Screen dump =====
>
> # ifconfig eth0 0.0.0.0 down
> # ifconfig eth1 0.0.0.0 down
> # ifconfig lo 0.0.0.0 down
> # ip li de eth0
> # ip li de eth1
> # ifconfig -a
> ip6tnl0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
> NOARP MTU:1460 Metric:1
> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
>
> lo Link encap:Local Loopback
> inet addr:127.0.0.1 Mask:255.0.0.0
> LOOPBACK MTU:16436 Metric:1
> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
>
> sit0 Link encap:IPv6-in-IPv4
> NOARP MTU:1480 Metric:1
> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
>
> tunl0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
> NOARP MTU:1480 Metric:1
> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
>
> # ps
> PID USER VSZ STAT COMMAND
> 1 root 12412 S /usr/lib64/lxc/lxc-init -- /var/bin/init
> 2 root 4540 S /bin/ash /var/bin/init
> 7 root 6640 S inetd
> 8 root 4544 S /bin/ash
> 26 root 4544 R ps
> # lsmod
> Module Size Used by Not tainted
> macvlan 8709 0
> pcnet32 29549 0
> tg3 112093 0
> libphy 21043 1 tg3
> # kill 7 2
> # ps
> PID USER VSZ STAT COMMAND
> 1 root 12412 S /usr/lib64/lxc/lxc-init -- /var/bin/init
> 8 root 4544 S /bin/ash
> 28 root 4544 R ps
> # exit ( here is the exit from netns )
> # ipip_exit_net(enter)
> ipip_exit_net(1)
> ipip_exit_net(2)
> ------------[ cut here ]------------
> WARNING: at /home/hans/evip/kvm/net-next-2.6/kernel/sysctl.c:1953 unregister_sysctl_table+0xc7/0xf9()
> Hardware name: Bochs
> Modules linked in: macvlan pcnet32 tg3 libphy
> Pid: 5, comm: kworker/u:0 Not tainted 2.6.36-rc3+ #7
> Call Trace:
> [<ffffffff8103e281>] warn_slowpath_common+0x85/0x9d
> [<ffffffff8103e2b3>] warn_slowpath_null+0x1a/0x1c
> [<ffffffff81045e64>] unregister_sysctl_table+0xc7/0xf9
> [<ffffffff812c86a5>] neigh_sysctl_unregister+0x27/0x3f
> [<ffffffff81342108>] addrconf_ifdown+0x415/0x45e
> [<ffffffff81342b98>] addrconf_notify+0x756/0x7fe
> [<ffffffff812cacfb>] ? neigh_ifdown+0xc3/0xd4
> [<ffffffff813622b3>] ? ip6mr_device_event+0x8d/0x9e
> [<ffffffff8105eddb>] notifier_call_chain+0x37/0x63
> [<ffffffff8105ee8b>] raw_notifier_call_chain+0x14/0x16
> [<ffffffff812c15c7>] call_netdevice_notifiers+0x4a/0x4f
> [<ffffffff812c1c1b>] rollback_registered_many+0x121/0x208
> [<ffffffff812c1d1d>] unregister_netdevice_many+0x1b/0x71
> [<ffffffff81324209>] ipip_exit_net+0xea/0x11a
> [<ffffffff812bc941>] ? cleanup_net+0x0/0x198
> [<ffffffff812bc2cf>] ops_exit_list+0x2a/0x5b
> [<ffffffff812bca39>] cleanup_net+0xf8/0x198
> [<ffffffff810568c7>] process_one_work+0x2a2/0x44d
> [<ffffffff81056e35>] worker_thread+0x1db/0x34e
> [<ffffffff81056c5a>] ? worker_thread+0x0/0x34e
> [<ffffffff8105a030>] kthread+0x82/0x8a
> [<ffffffff81003954>] kernel_thread_helper+0x4/0x10
> [<ffffffff81059fae>] ? kthread+0x0/0x8a
> [<ffffffff81003950>] ? kernel_thread_helper+0x0/0x10
> ---[ end trace 939b5185219f32e7 ]---
> ipip_exit_net(3)
> ipip_exit_net(exit)
> unregister_netdevice: waiting for lo to become free. Usage count = 4
> unregister_netdevice: waiting for lo to become free. Usage count = 4
> unregister_netdevice: waiting for lo to become free. Usage count = 4
> ....
> ...
> ===== End of screen dump =====
>
> lxc conf file:
> # Container with network virtualized using the vlan device driver
> # Local eth0 uplink
> lxc.utsname = fee_0
> lxc.network.type = macvlan
> lxc.network.flags = up
> lxc.network.link = eth1
> lxc.network.hwaddr = 00:00:04:01:01:01
> lxc.network.ipv4 = 192.168.1.21/24
> lxc.network.ipv6 = 2003::2:1:1/96
> # local eth1 downlink - to the RS farm
> lxc.network.type = macvlan
> lxc.network.flags = up
> lxc.network.link = eth0
> lxc.network.hwaddr = 00:00:03:01:01:01
> lxc.network.ipv4 = 192.168.0.21/24
> lxc.network.ipv6 = 2003::1:1:1/96
> lxc.mount.entry = /var/lib/lxc/fee_0/var /var none rw,bind 0 0
>
next prev parent reply other threads:[~2010-10-08 11:19 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-07 8:48 BUG ? ipip unregister_netdevice_many() Hans Schillstrom
2010-10-08 11:19 ` Daniel Lezcano [this message]
2010-10-08 11:53 ` Hans Schillstrom
2010-10-08 12:28 ` Hans Schillstrom
2010-10-08 15:53 ` Daniel Lezcano
2010-10-08 16:17 ` Daniel Lezcano
2010-10-08 16:58 ` Eric W. Biederman
2010-10-08 17:29 ` Daniel Lezcano
2010-10-08 17:47 ` Daniel Lezcano
2010-10-08 16:45 ` Eric W. Biederman
2010-10-08 17:20 ` David Miller
2010-10-08 17:32 ` Eric W. Biederman
2010-10-12 20:05 ` David Miller
2010-10-13 11:19 ` Jarek Poplawski
2010-10-13 21:58 ` David Miller
2010-10-14 6:41 ` Hans Schillstrom
2010-10-13 22:16 ` Daniel Lezcano
2010-10-13 23:23 ` David Miller
2010-10-14 3:57 ` Eric Dumazet
2010-10-14 23:28 ` Paul E. McKenney
2010-10-14 4:40 ` Eric W. Biederman
2010-10-14 4:50 ` David Miller
2010-10-14 5:20 ` Eric W. Biederman
2010-10-14 15:09 ` David Miller
2010-10-14 18:35 ` Eric W. Biederman
2010-10-08 16:51 ` Eric W. Biederman
2010-10-08 16:06 ` Eric W. Biederman
-- strict thread matches above, loose matches on Subject: below --
2010-10-14 19:21 Octavian Purdila
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