[ 118.059308] BUG: unable to handle kernel NULL pointer dereference at (null) [ 118.065034] IP: rtmsg_ifa+0x2d/0xe0 [ 118.065744] *pdpt = 000000003434e001 *pde = 0000000000000000
[ 118.067166] Oops: 0000 [#1] SMP [ 118.067863] Modules linked in: veth openvswitch nf_conntrack_ipv6 nf_nat_ipv6 nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_defrag_ipv6 nf_nat nf_conntrack ppdev kvm_intel kvm irqbypass parport_pc input_leds parport joydev serio_raw ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear crc32_pclmul pcbc hid_generic usbhid aesni_intel hid aes_i586 psmouse crypto_simd virtio_net cryptd virtio_blk floppy [ 118.081568] CPU: 0 PID: 29 Comm: kworker/u2:1 Tainted: G W 4.13.0-19-generic #22~16.04.1-Ubuntu [ 118.088041] Hardware name: OpenStack Foundation OpenStack Nova, BIOS 1.10.1-1ubuntu1~cloud0 04/01/2014 [ 118.090334] Workqueue: netns cleanup_net [ 118.091146] task: f537e300 task.stack: f485a000 [ 118.092077] EIP: rtmsg_ifa+0x2d/0xe0 [ 118.092778] EFLAGS: 00010246 CPU: 0 [ 118.093654] EAX: 00000000 EBX: f3674e00 ECX: 00000000 EDX: 014000c0 [ 118.095002] ESI: 00000000 EDI: f34dad80 EBP: f485bd94 ESP: f485bd7c [ 118.101126] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 [ 118.102531] CR0: 80050033 CR2: 00000000 CR3: 33df3860 CR4: 000406f0 [ 118.104276] Call Trace: [ 118.105159] __inet_del_ifa+0x129/0x270 [ 118.106192] ? igmpv3_clear_delrec+0x28/0xb0 [ 118.107392] inetdev_event+0x1ff/0x4e0 [ 118.113963] ? __schedule+0x41e/0x8d0 [ 118.115418] notifier_call_chain+0x4e/0x70 [ 118.117049] ? notifier_call_chain+0x4e/0x70 [ 118.118081] raw_notifier_call_chain+0x11/0x20 [ 118.119125] call_netdevice_notifiers_info+0x2a/0x60 [ 118.125600] rollback_registered_many+0x268/0x370 [ 118.127652] unregister_netdevice_many+0x16/0x80 [ 118.129980] ? unregister_netdevice_many+0x16/0x80 [ 118.136510] default_device_exit_batch+0x126/0x150 [ 118.138577] ? do_wait_intr_irq+0x80/0x80 [ 118.140326] ops_exit_list.isra.8+0x4d/0x60 [ 118.142126] cleanup_net+0x18e/0x270 [ 118.143731] process_one_work+0x118/0x390 [ 118.149200] worker_thread+0x37/0x410 [ 118.150881] kthread+0xdb/0x110 [ 118.152617] ? process_one_work+0x390/0x390 [ 118.154530] ? kthread_create_on_node+0x20/0x20 [ 118.161804] ret_from_fork+0x19/0x24 [ 118.163523] Code: 66 66 90 55 89 e5 57 56 53 89 d7 89 ce 83 ec 0c 85 c9 89 45 ec 0f 84 93 00 00 00 8b 41 08 89 45 f0 8b 47 0c 31 c9 ba c0 00 40 01 <8b> 00 8b 80 20 03 00 00 6a ff 89 45 e8 b8 60 00 00 00 e8 7c 3e [ 118.175426] EIP: rtmsg_ifa+0x2d/0xe0 SS:ESP: 0068:f485bd7c [ 118.177188] CR2: 0000000000000000 [ 118.178305] ---[ end trace d1d2a116a66e2f9d ]--- -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1736390 Title: openvswitch: kernel opps destroying interfaces on i386 Status in linux package in Ubuntu: Triaged Status in linux source package in Bionic: Triaged Bug description: Reproducable on bionic using the autopkgtest's from openvswitch on i386: [ 41.420568] BUG: unable to handle kernel NULL pointer dereference at (null) [ 41.421000] IP: igmp_group_dropped+0x21/0x220 [ 41.421246] *pdpt = 000000001d62c001 *pde = 0000000000000000 [ 41.421659] Oops: 0000 [#1] SMP [ 41.421852] Modules linked in: veth openvswitch nf_conntrack_ipv6 nf_nat_ipv6 nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_defrag_ipv6 nf_nat nf_conntrack libcrc32c 9p fscache ppdev kvm_intel kvm 9pnet_virtio irqbypass input_leds joydev 9pnet parport_pc serio_raw parport i2c_piix4 qemu_fw_cfg mac_hid sch_fq_codel ip_tables x_tables autofs4 btrfs xor raid6_pq psmouse virtio_blk virtio_net pata_acpi floppy [ 41.423855] CPU: 0 PID: 5 Comm: kworker/u2:0 Tainted: G W 4.13.0-18-generic #21-Ubuntu [ 41.424355] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014 [ 41.424849] Workqueue: netns cleanup_net [ 41.425071] task: db8fba80 task.stack: dba10000 [ 41.425346] EIP: igmp_group_dropped+0x21/0x220 [ 41.425656] EFLAGS: 00010202 CPU: 0 [ 41.425864] EAX: 00000000 EBX: dd726360 ECX: dba11e6c EDX: 00000002 [ 41.426335] ESI: 00000000 EDI: dd4db500 EBP: dba11dcc ESP: dba11d94 [ 41.426687] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 [ 41.426990] CR0: 80050033 CR2: 00000000 CR3: 1e6d6d60 CR4: 000006f0 [ 41.427340] Call Trace: [ 41.427485] ? __wake_up+0x36/0x40 [ 41.427680] ip_mc_down+0x27/0x90 [ 41.427869] inetdev_event+0x398/0x4e0 [ 41.428082] ? skb_dequeue+0x5b/0x70 [ 41.428286] ? wireless_nlevent_flush+0x4c/0x90 [ 41.428541] notifier_call_chain+0x4e/0x70 [ 41.428772] raw_notifier_call_chain+0x11/0x20 [ 41.429023] call_netdevice_notifiers_info+0x2a/0x60 [ 41.429301] dev_close_many+0x9d/0xe0 [ 41.429509] rollback_registered_many+0xd7/0x380 [ 41.429768] unregister_netdevice_many.part.102+0x10/0x80 [ 41.430075] default_device_exit_batch+0x134/0x160 [ 41.430344] ? do_wait_intr_irq+0x80/0x80 [ 41.430650] ops_exit_list.isra.8+0x4d/0x60 [ 41.430886] cleanup_net+0x18e/0x260 [ 41.431090] process_one_work+0x1a0/0x390 [ 41.431317] worker_thread+0x37/0x450 [ 41.431525] kthread+0xf3/0x110 [ 41.431714] ? process_one_work+0x390/0x390 [ 41.431941] ? kthread_create_on_node+0x20/0x20 [ 41.432187] ret_from_fork+0x19/0x24 [ 41.432382] Code: 90 90 90 90 90 90 90 90 90 90 3e 8d 74 26 00 55 89 e5 57 56 53 89 c3 83 ec 2c 8b 33 65 a1 14 00 00 00 89 45 f0 31 c0 80 7b 4b 00 <8b> 06 8b b8 20 03 00 00 8b 43 04 0f 85 5e 01 00 00 3d e0 00 00 [ 41.433405] EIP: igmp_group_dropped+0x21/0x220 SS:ESP: 0068:dba11d94 [ 41.433750] CR2: 0000000000000000 [ 41.433961] ---[ end trace 595db54cab84070c ]--- system then becomes unresponsive; no further interfaces can be created. 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