BUG: unable to handle kernel paging request at ffffe8ff00000000
PGD 1cf66b067 P4D 1cf66b067 PUD 0 
Oops: 0000 [#1] SMP PTI
CPU: 0 PID: 1687 Comm: kworker/u4:6 Not tainted 4.18.0-rc8+ #33
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
RIP: 0010:__skb_unlink include/linux/skbuff.h:1844 [inline]
RIP: 0010:__skb_dequeue include/linux/skbuff.h:1864 [inline]
RIP: 0010:__skb_queue_purge include/linux/skbuff.h:2587 [inline]
RIP: 0010:gro_cells_destroy+0x2bd/0x640 net/core/gro_cells.c:88
Code: 00 41 83 c4 ff 4c 89 f7 e8 b0 54 20 fb 89 18 85 db 0f 85 89 01 00 00 45 89 26 48 8b 5d a0 48 85 db 0f 85 8c 01 00 00 4d 89 ec <4d> 8b 7d 00 4c 89 ef e8 a7 54 20 fb 4d 8d 75 08 4c 8b 28 8b 02 89 
RSP: 0018:ffff8801c86cf8f0 EFLAGS: 00010246
RAX: ffff88013453b010 RBX: 0000000000000000 RCX: ffff880134540010
RDX: ffff880134540010 RSI: aaaaaaaaaaaab000 RDI: ffffea000739f680
RBP: ffff8801c86cf988 R08: 0000000000480020 R09: ffff88021fc39090
R10: 0000000000000000 R11: ffffffff87390220 R12: ffffe8ff00000000
R13: ffffe8ff00000000 R14: ffffe8ffffc4d010 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffe8ff00000000 CR3: 0000000145944000 CR4: 00000000001406f0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 ip_tunnel_dev_free+0x3b/0xa0 net/ipv4/ip_tunnel.c:960
 netdev_run_todo+0x10d5/0x14d0 net/core/dev.c:8258
 rtnl_unlock+0x13/0x20 net/core/rtnetlink.c:117
 ip_tunnel_delete_nets+0x68a/0x6a0 net/ipv4/ip_tunnel.c:1074
 ipgre_exit_batch_net+0x6c/0x80 net/ipv4/ip_gre.c:1059
 ops_exit_list net/core/net_namespace.c:155 [inline]
 cleanup_net+0xbbb/0x16c0 net/core/net_namespace.c:523
 process_one_work+0x1605/0x1f40 kernel/workqueue.c:2153
 worker_thread+0x11a2/0x2590 kernel/workqueue.c:2296
 kthread+0x44d/0x480 kernel/kthread.c:247
 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:415
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
CR2: ffffe8ff00000000
---[ end trace 9968c45b97c11876 ]---
RIP: 0010:__skb_unlink include/linux/skbuff.h:1844 [inline]
RIP: 0010:__skb_dequeue include/linux/skbuff.h:1864 [inline]
RIP: 0010:__skb_queue_purge include/linux/skbuff.h:2587 [inline]
RIP: 0010:gro_cells_destroy+0x2bd/0x640 net/core/gro_cells.c:88
Code: 00 41 83 c4 ff 4c 89 f7 e8 b0 54 20 fb 89 18 85 db 0f 85 89 01 00 00 45 89 26 48 8b 5d a0 48 85 db 0f 85 8c 01 00 00 4d 89 ec <4d> 8b 7d 00 4c 89 ef e8 a7 54 20 fb 4d 8d 75 08 4c 8b 28 8b 02 89 
RSP: 0018:ffff8801c86cf8f0 EFLAGS: 00010246
RAX: ffff88013453b010 RBX: 0000000000000000 RCX: ffff880134540010
RDX: ffff880134540010 RSI: aaaaaaaaaaaab000 RDI: ffffea000739f680
RBP: ffff8801c86cf988 R08: 0000000000480020 R09: ffff88021fc39090
R10: 0000000000000000 R11: ffffffff87390220 R12: ffffe8ff00000000
R13: ffffe8ff00000000 R14: ffffe8ffffc4d010 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffe8ff00000000 CR3: 0000000145944000 CR4: 00000000001406f0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600