kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 6102 Comm: kworker/u4:16 Not tainted 4.9.141+ #1
Workqueue: netns cleanup_net
task: ffff8801c5a22f80 task.stack: ffff8801b1580000
RIP: 0010:[<ffffffff826bd1c7>]  [<ffffffff826bd1c7>] addrconf_rt_table+0x127/0x290 net/ipv6/addrconf.c:2223
RSP: 0018:ffff8801b1587540  EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000200 RCX: 0000000000000004
RDX: 0000000000000056 RSI: 0000000000000004 RDI: 00000000000002b0
RBP: ffff8801b1587570 R08: ffff8801c5a23830 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 00000000000000fe R14: ffff8801d53f9100 R15: ffff8801d711ee10
FS:  0000000000000000(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffa404bb000 CR3: 00000001d1e38000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff826bd0a0 ffff8801d53f9100 0000000000000000 ffff8801ac821e80
 ffff8801c63ec900 ffff8801d711ee10 ffff8801b15875b8 ffffffff826bdab3
 00000000c63ec7b8 ffff880100000080 ffff8801d711ec80 ffff8801d711ee10
Call Trace:
 [<ffffffff826bdab3>] addrconf_get_prefix_route+0x33/0x270 net/ipv6/addrconf.c:2277
 [<ffffffff826be2c8>] __ipv6_ifa_notify+0x5d8/0x790 net/ipv6/addrconf.c:5496
 [<ffffffff826bfcbe>] addrconf_ifdown+0xaae/0x1420 net/ipv6/addrconf.c:3689
 [<ffffffff826c74be>] addrconf_notify+0x8ee/0x2140 net/ipv6/addrconf.c:3493
 [<ffffffff811478d4>] notifier_call_chain+0xb4/0x1d0 kernel/notifier.c:93
 [<ffffffff81147a5d>] __raw_notifier_call_chain kernel/notifier.c:394 [inline]
 [<ffffffff81147a5d>] raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401
 [<ffffffff822f4a45>] call_netdevice_notifiers_info+0x55/0x70 net/core/dev.c:1647
 [<ffffffff823034e5>] call_netdevice_notifiers net/core/dev.c:1663 [inline]
 [<ffffffff823034e5>] rollback_registered_many+0x6e5/0xb50 net/core/dev.c:6860
 [<ffffffff8230d6f8>] unregister_netdevice_many+0x48/0x220 net/core/dev.c:7907
 [<ffffffff825e7ebf>] ip_tunnel_delete_net+0x2af/0x390 net/ipv4/ip_tunnel.c:1069
 [<ffffffff825f14f9>] vti_exit_net+0x129/0x1f0 net/ipv4/ip_vti.c:458
 [<ffffffff822e3d70>] ops_exit_list.isra.0+0xb0/0x160 net/core/net_namespace.c:136
 [<ffffffff822e6ad2>] cleanup_net+0x3f2/0x8b0 net/core/net_namespace.c:473
 [<ffffffff81131001>] process_one_work+0x831/0x15f0 kernel/workqueue.c:2092
 [<ffffffff81131e96>] worker_thread+0xd6/0x1140 kernel/workqueue.c:2226
 [<ffffffff81142c3d>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff82817a5c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Code: 82 be 01 00 00 00 48 c7 c7 60 c3 0c 83 e8 d2 f9 b4 fe 49 8d bc 24 b0 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 34 01 00 00 45 8b bc 24 b0 
RIP  [<ffffffff826bd1c7>] addrconf_rt_table+0x127/0x290 net/ipv6/addrconf.c:2223
 RSP <ffff8801b1587540>
---[ end trace 09a69f2cdb6d540c ]---