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While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1736390
and then change the status of the bug to 'Confirmed'.
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This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Tags added: artful
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https://bugs.launchpad.net/bugs/1736390
Title:
openvswitch: kernel opps destroying interfaces on i386
Status in linux package in Ubuntu:
Incomplete
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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