BUG: unable to handle page fault for address: ffffde2021a6e4b3
#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: 55 Comm: kworker/u4:2 Not tainted 5.2.0-rc1+ #25
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
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 e2 74 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: 00010a02
RAX: dffffc0000000000 RBX: ffff11010d372580 RCX: 1ffffffff10e9c4d
RDX: 1fffe22021a6e4b3 RSI: ffffffff83355e3c RDI: ffff11010d372598
RBP: ffff8880ae9098d8 R08: ffff8880a9b706c0 R09: ffffed1015d26be0
R10: ffffed1015d26bdf R11: ffff8880ae935efb R12: 00000000000000fc
R13: ffff888065a6ae40 R14: ffff88806480a094 R15: ffff8880a133c480
FS:  0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffde2021a6e4b3 CR3: 00000000a5ed0000 CR4: 00000000001406e0
Call Trace:
 <IRQ>
 udp_tunnel_xmit_skb+0x236/0x310 net/ipv4/udp_tunnel.c:192
 tipc_udp_xmit.isra.0+0x802/0xcc0 net/tipc/udp_media.c:181
 tipc_udp_send_msg+0x295/0x4a0 net/tipc/udp_media.c:247
 tipc_bearer_xmit_skb+0x16c/0x360 net/tipc/bearer.c:503
 tipc_disc_timeout+0x933/0xd60 net/tipc/discover.c:332
 call_timer_fn+0x193/0x720 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+0x25c/0x94c 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+0x13b/0x550 arch/x86/kernel/apic/apic.c:1068
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:806
 </IRQ>
RIP: 0010:__rcu_read_unlock+0xd0/0x130 kernel/rcu/tree_plugin.h:416
Code: 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 57 8b 83 74 03 00 00 85 c0 75 5e 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 <48> c1 ea 03 0f b6 04 02 84 c0 74 04 3c 03 7e 37 c7 83 70 03 00 00
RSP: 0018:ffff8880a9b7fcc0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: ffff8880a9b706c0 RCX: ffffffff870069b1
RDX: ffff8880a9b70a30 RSI: ffffffff8700671f RDI: ffff8880a9b70a34
RBP: ffff8880a9b7fcd0 R08: ffff8880a9b706c0 R09: ffffed1015d26be0
R10: ffffed1015d26bdf R11: ffff8880ae935efb R12: ffff8880a9b70a30
R13: 00000000000003af R14: 0000000000000001 R15: dffffc0000000000
 rcu_read_unlock include/linux/rcupdate.h:648 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:411 [inline]
 batadv_nc_worker+0x208/0x760 net/batman-adv/network-coding.c:718
 process_one_work+0x989/0x1790 kernel/workqueue.c:2269
 worker_thread+0x98/0xe40 kernel/workqueue.c:2415
 kthread+0x354/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Modules linked in:
CR2: ffffde2021a6e4b3
---[ end trace 72af32069d937812 ]---
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 e2 74 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: 00010a02
RAX: dffffc0000000000 RBX: ffff11010d372580 RCX: 1ffffffff10e9c4d
RDX: 1fffe22021a6e4b3 RSI: ffffffff83355e3c RDI: ffff11010d372598
RBP: ffff8880ae9098d8 R08: ffff8880a9b706c0 R09: ffffed1015d26be0
R10: ffffed1015d26bdf R11: ffff8880ae935efb R12: 00000000000000fc
R13: ffff888065a6ae40 R14: ffff88806480a094 R15: ffff8880a133c480
FS:  0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffde2021a6e4b3 CR3: 00000000a5ed0000 CR4: 00000000001406e0