It can be consistently reproduced. - Bring up a docker container - Create an ip link with type macvlan - Move it to another netns for a container - Bring it up and assign ip address - Then, remove the link from the container and terminate the container. - Repeat the process again will cause this crash dump. ------------[ cut here ]------------ [ 2307.593973] kernel BUG at /build/buildd/linux-3.13.0/net/core/dev.c:6437! [ 2307.594461] invalid opcode: 0000 [#1] SMP [ 2307.594883] Modules linked in: veth macvlan openvswitch gre vxlan ip_tunnel libcrc32c xt_addrtype xt_conntrack ipt_MASQUERADE iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack bridge stp llc aufs iptable_filter ip_tables x_tables hid_generic ppdev coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul btusb ghash_clmulni_intel bluetooth vmw_balloon aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd snd_ens1371 serio_raw snd_ac97_codec ac97_bus gameport snd_rawmidi snd_seq_device snd_pcm usbhid hid snd_page_alloc snd_timer snd soundcore vmwgfx ttm shpchp drm i2c_piix4 vmw_vmci parport_pc mac_hid lp parport psmouse ahci libahci e1000 mptspi mptscsih floppy mptbase vmw_pvscsi vmxnet3 [ 2307.598952] CPU: 0 PID: 6778 Comm: ip Tainted: G W 3.13.0-32-generic #57-Ubuntu [ 2307.599433] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/31/2013 [ 2307.600419] task: ffff8801353d5fc0 ti: ffff8801352f2000 task.ti: ffff8801352f2000 [ 2307.600955] RIP: 0010:[<ffffffff8162447f>] [<ffffffff8162447f>] free_netdev+0xff/0x110 [ 2307.601475] RSP: 0018:ffff8801352f38d8 EFLAGS: 00010293 [ 2307.602000] RAX: 0000000000000001 RBX: ffff8800b6bdb018 RCX: 0000000000000254 [ 2307.602498] RDX: 0000000000000001 RSI: 0000000000000282 RDI: 0000000000000282 [ 2307.602988] RBP: ffff8801352f38f0 R08: 00018608fffffee0 R09: ffffff90ffffffb0 [ 2307.603477] R10: ffffff90ffffffb0 R11: 00001398ffffffd0 R12: ffff8800b6bdb060 [ 2307.603967] R13: ffff8800b6bdb000 R14: ffff8801352f3900 R15: ffffffffa0485000 [ 2307.604455] FS: 00007f0e72cff740(0000) GS:ffff880138400000(0000) knlGS:0000000000000000 [ 2307.604947] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 2307.605433] CR2: 00007fff9b91fe60 CR3: 0000000134b11000 CR4: 00000000001407f0 [ 2307.606043] Stack: [ 2307.606578] 00000000ffffffef ffffffff81cda240 ffff8801352f3920 ffff8801352f3ae8 [ 2307.607259] ffffffff81632848 0000000000000000 ffff8800ba35c648 0000000000000000 [ 2307.607815] ffffffff8163240e ffffffff81cda240 ffff8800ba35c610 ffff8800b6bdb000 [ 2307.608444] Call Trace: [ 2307.608982] [<ffffffff81632848>] rtnl_newlink+0x578/0x5d0 [ 2307.609809] [<ffffffff8163240e>] ? rtnl_newlink+0x13e/0x5d0 [ 2307.610858] [<ffffffff8162f0b9>] rtnetlink_rcv_msg+0x99/0x260 [ 2307.611868] [<ffffffff81610e7e>] ? __alloc_skb+0x7e/0x2b0 [ 2307.612922] [<ffffffff8162f020>] ? rtnetlink_rcv+0x30/0x30 [ 2307.613920] [<ffffffff8164d659>] netlink_rcv_skb+0xa9/0xc0 [ 2307.614987] [<ffffffff8162f018>] rtnetlink_rcv+0x28/0x30 [ 2307.615974] [<ffffffff8164cc85>] netlink_unicast+0xd5/0x1b0 [ 2307.616948] [<ffffffff8164d05f>] netlink_sendmsg+0x2ff/0x740 [ 2307.617957] [<ffffffff816079eb>] sock_sendmsg+0x8b/0xc0 [ 2307.619037] [<ffffffff811b1356>] ? __mem_cgroup_commit_charge+0x156/0x3d0 [ 2307.620042] [<ffffffff816076de>] ? move_addr_to_kernel.part.16+0x1e/0x60 [ 2307.620963] [<ffffffff816082a1>] ? move_addr_to_kernel+0x21/0x30 [ 2307.621874] [<ffffffff81608273>] ___sys_sendmsg+0x3c3/0x3d0 [ 2307.622691] [<ffffffff81727c64>] ? __do_page_fault+0x204/0x560 [ 2307.623572] [<ffffffff8111155c>] ? acct_account_cputime+0x1c/0x20 [ 2307.624061] [<ffffffff8109d7db>] ? account_user_time+0x8b/0xa0 [ 2307.624472] [<ffffffff81608972>] __sys_sendmsg+0x42/0x80 [ 2307.624864] [<ffffffff816089c2>] SyS_sendmsg+0x12/0x20 [ 2307.625265] [<ffffffff8172c87f>] tracesys+0xe1/0xe6 [ 2307.625628] Code: a7 e6 ff 5b 41 5c 41 5d 5d c3 66 90 e8 2b 3a b6 ff e9 53 ff ff ff 66 0f 1f 44 00 00 4c 89 ef e8 b8 fe ff ff 5b 41 5c 41 5d 5d c3 <0f> 0b 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 [ 2307.626779] RIP [<ffffffff8162447f>] free_netdev+0xff/0x110 [ 2307.627392] RSP <ffff8801352f38d8> [ 2307.629586] ---[ end trace 9c2a19ae6ba1d1f6 ]---
- Bring up a docker container - Create an ip link with type macvlan in the default netns - Move it to the container netns - Bring it up and assign ip address - Then, remove the link from the container and terminate the container.