BUG: unable to handle page fault for address: ffffde2028d06d8b
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 21938 Comm: kworker/u4:3 Not tainted 5.1.0+ #7
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+0x6e5/0x970 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 70 6f 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:ffff8880ae909878 EFLAGS: 00010a06
RAX: dffffc0000000000 RBX: ffff110146836c40 RCX: 1ffffffff10dee0d
RDX: 1fffe22028d06d8b RSI: ffffffff8334ff3c RDI: ffff110146836c58
RBP: ffff8880ae9098d8 R08: ffff8880964bc080 R09: ffffed1015d26be0
R10: ffffed1015d26bdf R11: ffff8880ae935efb R12: 00000000000000fc
R13: ffff88806ea3a4c0 R14: ffff8880a3d17bd4 R15: ffff88808b843940
FS:  0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffde2028d06d8b CR3: 00000000987f7000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
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+0x196/0x720 kernel/time/timer.c:1322
 expire_timers kernel/time/timer.c:1366 [inline]
 __run_timers kernel/time/timer.c:1685 [inline]
 __run_timers kernel/time/timer.c:1653 [inline]
 run_timer_softirq+0x66f/0x1740 kernel/time/timer.c:1698
 __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:1067
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:806
 </IRQ>
RIP: 0010:__sanitizer_cov_trace_pc+0x26/0x50 kernel/kcov.c:102
Code: 90 90 90 90 55 48 89 e5 48 8b 75 08 65 48 8b 04 25 c0 fd 01 00 65 8b 15 90 23 91 7e 81 e2 00 01 1f 00 75 2b 8b 90 e0 12 00 00 <83> fa 02 75 20 48 8b 88 e8 12 00 00 8b 80 e4 12 00 00 48 8b 11 48
RSP: 0018:ffff8880a5d2fb78 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffff8880964bc080 RBX: 000000000007ffff RCX: ffff8880964bc900
RDX: 0000000000000000 RSI: ffffffff85ebe430 RDI: ffff8880964bc3f0
RBP: ffff8880a5d2fb78 R08: ffff8880964bc080 R09: 0000000000000004
R10: ffffed1015d26bdf R11: ffff8880ae935efb R12: 000000000000000a
R13: 0000000000000001 R14: 000000000003baba R15: dffffc0000000000
 rcu_lock_acquire include/linux/rcupdate.h:210 [inline]
 rcu_read_lock include/linux/rcupdate.h:595 [inline]
 inet_twsk_purge+0xa0/0x5f0 net/ipv4/inet_timewait_sock.c:267
 dccp_v6_exit_batch+0x1a/0x20 net/dccp/ipv6.c:1117
 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:2268
 worker_thread+0x98/0xe40 kernel/workqueue.c:2414
 kthread+0x357/0x430 kernel/kthread.c:253
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Modules linked in:
CR2: ffffde2028d06d8b
---[ end trace b73f0a7c9ebf46f8 ]---
RIP: 0010:iptunnel_xmit_stats include/net/ip_tunnels.h:444 [inline]
RIP: 0010:iptunnel_xmit+0x6e5/0x970 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 70 6f 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:ffff8880ae909878 EFLAGS: 00010a06
RAX: dffffc0000000000 RBX: ffff110146836c40 RCX: 1ffffffff10dee0d
RDX: 1fffe22028d06d8b RSI: ffffffff8334ff3c RDI: ffff110146836c58
RBP: ffff8880ae9098d8 R08: ffff8880964bc080 R09: ffffed1015d26be0
R10: ffffed1015d26bdf R11: ffff8880ae935efb R12: 00000000000000fc
R13: ffff88806ea3a4c0 R14: ffff8880a3d17bd4 R15: ffff88808b843940
FS:  0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffde2028d06d8b CR3: 00000000987f7000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400