BUG: unable to handle kernel paging request at ffffde2023202263
#PF error: [normal kernel read fault]
PGD 0 P4D 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 8042 Comm: kworker/u4:5 Not tainted 5.1.0-rc7+ #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
RIP: 0010:iptunnel_xmit_stats include/net/ip_tunnels.h:444 [inline]
RIP: 0010:iptunnel_xmit+0x6ed/0x980 net/ipv4/ip_tunnel_core.c:94
Code: c1 e9 03 80 3c 11 00 0f 85 72 02 00 00 48 03 1c c5 60 00 6c 88 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 18 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 5d 02 00 00 48 8d 7b 10 4d 63 e4 48 b8 00 00 00
RSP: 0018:ffff8880ae907888 EFLAGS: 00010a06
RAX: dffffc0000000000 RBX: ffff110119011300 RCX: 1ffffffff10d800d
RDX: 1fffe22023202263 RSI: ffffffff833180ac RDI: ffff110119011318
RBP: ffff8880ae9078e8 R08: ffff888085d4e240 R09: ffffed1015d25bc8
R10: ffffed1015d25bc7 R11: ffff8880ae92de3b R12: 00000000000000fc
R13: ffff88808af08800 R14: ffff8880a54d2514 R15: ffff88808ee37840
FS:  0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffde2023202263 CR3: 000000006e195000 CR4: 00000000001406e0
Call Trace:
 <IRQ>
 udp_tunnel_xmit_skb+0x236/0x310 net/ipv4/udp_tunnel.c:191
 tipc_udp_xmit.isra.0+0x805/0xcc0 net/tipc/udp_media.c:181
 tipc_udp_send_msg+0x295/0x4a0 net/tipc/udp_media.c:247
 tipc_bearer_xmit_skb+0x172/0x360 net/tipc/bearer.c:503
 tipc_disc_timeout+0x933/0xd60 net/tipc/discover.c:332
 call_timer_fn+0x190/0x720 kernel/time/timer.c:1325
 expire_timers kernel/time/timer.c:1362 [inline]
 __run_timers kernel/time/timer.c:1681 [inline]
 __run_timers kernel/time/timer.c:1649 [inline]
 run_timer_softirq+0x652/0x1700 kernel/time/timer.c:1694
 __do_softirq+0x266/0x95a kernel/softirq.c:293
 invoke_softirq kernel/softirq.c:374 [inline]
 irq_exit+0x180/0x1d0 kernel/softirq.c:414
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x14a/0x570 arch/x86/kernel/apic/apic.c:1062
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
 </IRQ>
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x11/0x20 kernel/kcov.c:189
Code: bf 03 00 00 00 48 89 e5 48 8b 4d 08 e8 d8 fe ff ff 5d c3 66 0f 1f 44 00 00 55 89 f2 89 fe bf 05 00 00 00 48 89 e5 48 8b 4d 08 <e8> ba fe ff ff 5d c3 0f 1f 84 00 00 00 00 00 55 48 89 f2 48 89 fe
RSP: 0018:ffff888068a37b78 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff85e3617b
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000005
RBP: ffff888068a37b78 R08: ffff888085d4e240 R09: ffffed1015d25bc8
R10: ffffed1015d25bc7 R11: ffff8880ae92de3b R12: 000000000000000a
R13: 0000000000000001 R14: 0000000000023f4a R15: dffffc0000000000
 rcu_read_unlock include/linux/rcupdate.h:645 [inline]
 inet_twsk_purge+0x3cb/0x5f0 net/ipv4/inet_timewait_sock.c:298
 dccp_v6_exit_batch+0x1a/0x20 net/dccp/ipv6.c:1116
 ops_exit_list.isra.0+0x105/0x160 net/core/net_namespace.c:156
 cleanup_net+0x3fb/0x960 net/core/net_namespace.c:552
 process_one_work+0x98e/0x1790 kernel/workqueue.c:2269
 worker_thread+0x98/0xe40 kernel/workqueue.c:2415
 kthread+0x357/0x430 kernel/kthread.c:253
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Modules linked in:
CR2: ffffde2023202263
---[ end trace 13dab2913de0aea7 ]---
RIP: 0010:iptunnel_xmit_stats include/net/ip_tunnels.h:444 [inline]
RIP: 0010:iptunnel_xmit+0x6ed/0x980 net/ipv4/ip_tunnel_core.c:94
Code: c1 e9 03 80 3c 11 00 0f 85 72 02 00 00 48 03 1c c5 60 00 6c 88 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 18 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 5d 02 00 00 48 8d 7b 10 4d 63 e4 48 b8 00 00 00
RSP: 0018:ffff8880ae907888 EFLAGS: 00010a06
RAX: dffffc0000000000 RBX: ffff110119011300 RCX: 1ffffffff10d800d
RDX: 1fffe22023202263 RSI: ffffffff833180ac RDI: ffff110119011318
RBP: ffff8880ae9078e8 R08: ffff888085d4e240 R09: ffffed1015d25bc8
R10: ffffed1015d25bc7 R11: ffff8880ae92de3b R12: 00000000000000fc
R13: ffff88808af08800 R14: ffff8880a54d2514 R15: ffff88808ee37840
FS:  0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffde2023202263 CR3: 000000006e195000 CR4: 00000000001406e0