BUG: unable to handle page fault for address: ffffde2021c963a3
#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: 0 PID: 8310 Comm: kworker/u4:6 Not tainted 5.1.0+ #5
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 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:ffff8880ae809878 EFLAGS: 00010a06
RAX: dffffc0000000000 RBX: ffff11010e4b1d00 RCX: 1ffffffff10dee0c
RDX: 1fffe22021c963a3 RSI: ffffffff8334ff3c RDI: ffff11010e4b1d18
RBP: ffff8880ae8098d8 R08: ffff888067684340 R09: ffffed1015d06be0
R10: ffffed1015d06bdf R11: ffff8880ae835efb R12: 00000000000000fc
R13: ffff8880690a4ec0 R14: ffff8880898f3294 R15: ffff88808c10ce40
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffde2021c963a3 CR3: 00000000666a1000 CR4: 00000000001406f0
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:arch_local_irq_restore arch/x86/include/asm/paravirt.h:767 [inline]
RIP: 0010:lock_release+0x4c1/0xa00 kernel/locking/lockdep.c:4324
Code: 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 28 03 00 00 48 83 3d 3e d3 3a 07 00 0f 84 cf 01 00 00 48 8b bd 68 ff ff ff 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 c7 04 03 00 00 00
RSP: 0018:ffff88806768fc18 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff1124d7e RBX: 1ffff1100ced1f89 RCX: 1ffff1100ced0976
RDX: dffffc0000000000 RSI: 1ffff1100ced0982 RDI: 0000000000000282
RBP: ffff88806768fcd0 R08: ffff888067684340 R09: 0000000000000003
R10: ffffed1015d06bdf R11: ffff8880ae835efb R12: ffff888067684340
R13: ffffffff8701a28a R14: ffffffff8a455c80 R15: ffff88806768fca8
 rcu_lock_release include/linux/rcupdate.h:215 [inline]
 rcu_read_unlock include/linux/rcupdate.h:649 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:411 [inline]
 batadv_nc_worker+0x225/0x760 net/batman-adv/network-coding.c:718
 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: ffffde2021c963a3
---[ end trace 5ef30a4f71819150 ]---
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:ffff8880ae809878 EFLAGS: 00010a06
RAX: dffffc0000000000 RBX: ffff11010e4b1d00 RCX: 1ffffffff10dee0c
RDX: 1fffe22021c963a3 RSI: ffffffff8334ff3c RDI: ffff11010e4b1d18
RBP: ffff8880ae8098d8 R08: ffff888067684340 R09: ffffed1015d06be0
R10: ffffed1015d06bdf R11: ffff8880ae835efb R12: 00000000000000fc
R13: ffff8880690a4ec0 R14: ffff8880898f3294 R15: ffff88808c10ce40
FS:  0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffde2021c963a3 CR3: 00000000666a1000 CR4: 00000000001406f0