device tunl0 entered promiscuous mode
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
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 122 Comm: kworker/u4:2 Not tainted 4.9.93-geba1ffe #3
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
task: ffff8801d91ec800 task.stack: ffff8801d9218000
RIP: 0010:[<ffffffff81181b56>]  [<ffffffff81181b56>] get_work_pool+0xf6/0x1e0 kernel/workqueue.c:716
RSP: 0018:ffff8801d921f908  EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 0000001ffffffe00 RCX: 0000000000000000
RDX: 00000003ffffffc0 RSI: ffffffff81181b3e RDI: 0000000000000046
RBP: ffff8801d921f920 R08: ffff8801d91ed158 R09: 0000000000000001
R10: 0000000000000000 R11: 1ffff1003b23da26 R12: ffff8801ac30ad30
R13: ffff8801d921fbd8 R14: ffff8801ac30ad50 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdccf374000 CR3: 00000001b8f4a000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 dffffc0000000000 ffff8801ac30ad30 ffff8801d921fbd8 ffff8801d921fa60
 ffffffff81186fec ffffffff81186f10 ffff8801d91ed0c0 1ffff1003b243f2b
 ffff8801d91ec800 dffffc0000000000 0000000041b58ab3 ffffffff8419c892
Call Trace:
 [<ffffffff81186fec>] start_flush_work kernel/workqueue.c:2785 [inline]
 [<ffffffff81186fec>] flush_work+0xdc/0x6c0 kernel/workqueue.c:2845
 [<ffffffff833d141e>] xfrm_policy_fini+0x2e/0x310 net/xfrm/xfrm_policy.c:2998
 [<ffffffff833d1725>] xfrm_net_exit+0x25/0x30 net/xfrm/xfrm_policy.c:3065
 [<ffffffff82f36ae0>] ops_exit_list.isra.6+0xb0/0x160 net/core/net_namespace.c:136
 [<ffffffff82f399b1>] cleanup_net+0x321/0x630 net/core/net_namespace.c:454
 [<ffffffff8118ac91>] process_one_work+0x7e1/0x1500 kernel/workqueue.c:2092
 [<ffffffff8118ba86>] worker_thread+0xd6/0x10a0 kernel/workqueue.c:2226
 [<ffffffff8119ab4d>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff838d5b1c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Code: d1 ab 1d 00 48 89 d8 5b 41 5c 41 5d 5d c3 e8 c2 ab 1d 00 48 81 e3 00 fe ff ff 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 c6 00 00 00 48 8b 1b e8 98 ab 1d 00 48 89 d8 
RIP  [<ffffffff81181b56>] get_work_pool+0xf6/0x1e0 kernel/workqueue.c:716
 RSP <ffff8801d921f908>
---[ end trace 2491bcca7e7ffd16 ]---