RHEL7: System crash in ip6_route_dev_notify().

Issue

• System crash in ip6_route_dev_notify()

[3726063.560643] BUG: unable to handle kernel NULL pointer dereference at 0000000000000150
[3726063.560649] IP: [<ffffffff8165f883>] ip6_route_dev_notify+0xe3/0x150
[3726063.560659] PGD 0 
[3726063.560661] Oops: 0002 [#1] SMP 
[3726063.560737] CPU: 2 PID: 27859 Comm: runc:[1:CHILD] Tainted: P           OE  ------------ T 3.10.0-693.39.1.el7.x86_64 #1
[3726063.560739] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 09/21/2015
[3726063.560741] task: ffff8803b7d3af70 ti: ffff88000dc70000 task.ti: ffff88000dc70000
[3726063.560743] RIP: 0010:[<ffffffff8165f883>]  [<ffffffff8165f883>] ip6_route_dev_notify+0xe3/0x150
[3726063.560747] RSP: 0018:ffff88000dc73c60  EFLAGS: 00010297
[3726063.560749] RAX: ffff8803d97bf200 RBX: ffff880415306540 RCX: 0000000000000000
[3726063.560751] RDX: ffff88000dc73ce8 RSI: 0000000000000006 RDI: 0000000000000000
[3726063.560752] RBP: ffff88000dc73c68 R08: ffffffff81b35ec0 R09: 0000000000000002
[3726063.560754] R10: ffff88043fd1ba60 R11: ffffea0002e63000 R12: 0000000000000000
[3726063.560756] R13: 0000000000000006 R14: ffff88000dc73ce8 R15: 0000000000000000
[3726063.560758] FS:  00007f1692aa4740(0000) GS:ffff88043fd00000(0000) knlGS:0000000000000000
[3726063.560760] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[3726063.560762] CR2: 0000000000000150 CR3: 000000000489e000 CR4: 00000000000607e0
[3726063.560800] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[3726063.560828] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[3726063.560830] Call Trace:
[3726063.560837]  [<ffffffff816c19ef>] notifier_call_chain+0x4f/0x70
[3726063.560843]  [<ffffffff810bc516>] raw_notifier_call_chain+0x16/0x20
[3726063.560847]  [<ffffffff8159140d>] call_netdevice_notifiers_info+0x4d/0x80
[3726063.560850]  [<ffffffff81591c79>] rollback_registered_many+0x179/0x2d0
[3726063.560852]  [<ffffffff81591e10>] rollback_registered+0x40/0x70
[3726063.560856]  [<ffffffff8159aa0f>] register_netdevice+0x44f/0x500
[3726063.560860]  [<ffffffff8159aada>] register_netdev+0x1a/0x30
[3726063.560864]  [<ffffffff8148baaa>] loopback_net_init+0x4a/0xb0
[3726063.560868]  [<ffffffff8158af44>] ops_init+0x44/0x150
[3726063.560871]  [<ffffffff8158b0f3>] setup_net+0xa3/0x160
[3726063.560874]  [<ffffffff8158ba55>] copy_net_ns+0xb5/0x180
[3726063.560877]  [<ffffffff810bb5b9>] create_new_namespaces+0xf9/0x180
[3726063.560880]  [<ffffffff810bb7fa>] unshare_nsproxy_namespaces+0x5a/0xc0
[3726063.560886]  [<ffffffff8108c553>] SyS_unshare+0x193/0x300
[3726063.560891]  [<ffffffff816c66d5>] system_call_fastpath+0x1c/0x21
[3726063.560894]  [<ffffffff816c6621>] ? system_call_after_swapgs+0xae/0x146
[3726063.560896] Code: 48 01 00 00 b8 01 00 00 00 5b 5d c3 0f 1f 40 00 80 b8 d0 03 00 00 03 0f 84 58 ff ff ff 48 8b 83 28 05 00 00 48 8b b8 48 01 00 00 <f0> ff 8f 50 01 00 00 0f 94 c0 84 c0 74 05 e8 fa be 02 00 48 8b 
[3726063.560927] RIP  [<ffffffff8165f883>] ip6_route_dev_notify+0xe3/0x150
[3726063.560931]  RSP <ffff88000dc73c60>
[3726063.560932] CR2: 0000000000000150
[3726063.560932] CR2: 0000000000000150