------------[ cut here ]------------
WARNING: CPU: 0 PID: 7490 at kernel/rcu/tree.c:1057 rcu_irq_enter+0x15/0x20 kernel/rcu/tree.c:1057
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 7490 Comm: kworker/u4:2 Not tainted 5.8.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:231
 __warn.cold+0x20/0x45 kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:235
 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:255
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536
RIP: 0010:rcu_irq_enter+0x15/0x20 kernel/rcu/tree.c:1057
Code: 00 00 00 4c 89 e7 e8 1a 96 c4 f9 eb b4 0f 0b eb 8b 0f 1f 40 00 8b 05 96 28 c2 02 85 c0 74 0d 65 8b 05 2b af 12 78 85 c0 74 02 <0f> 0b e9 44 ff ff ff 0f 1f 40 00 53 48 c7 c3 40 6c 03 00 e8 43 08
RSP: 0018:ffffc90000006ba8 EFLAGS: 00010002
RAX: 0000000000000001 RBX: 0000000000000082 RCX: ffffffff8179db77
RDX: ffff888089198300 RSI: ffffffff8161d8e1 RDI: 0000000000000005
RBP: 0000000000000003 R08: 0000000000000000 R09: ffffffff8ab1540f
R10: 0000000000000000 R11: ffff888090060080 R12: 0000000000000082
R13: ffffffff8132e988 R14: 0000000000000001 R15: ffff8880ae636bc0
 rcu_irq_enter_irqson+0x76/0x140 kernel/rcu/tree.c:1072
 trace_irq_disable_rcuidle include/trace/events/preemptirq.h:36 [inline]
 trace_irq_disable_rcuidle include/trace/events/preemptirq.h:36 [inline]
 trace_hardirqs_off kernel/trace/trace_preemptirq.c:82 [inline]
 trace_hardirqs_off+0x114/0x210 kernel/trace/trace_preemptirq.c:74
 kvm_wait arch/x86/kernel/kvm.c:800 [inline]
 kvm_wait+0x88/0x240 arch/x86/kernel/kvm.c:793
 pv_wait arch/x86/include/asm/paravirt.h:666 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
 __pv_queued_spin_lock_slowpath+0x896/0xaf0 kernel/locking/qspinlock.c:508
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:656 [inline]
 queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:50 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:82 [inline]
 lockdep_lock+0x214/0x280 kernel/locking/lockdep.c:94
 graph_lock kernel/locking/lockdep.c:119 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3150 [inline]
 validate_chain kernel/locking/lockdep.c:3183 [inline]
 __lock_acquire+0x178a/0x5640 kernel/locking/lockdep.c:4426
 lock_acquire+0x1f1/0xad0 kernel/locking/lockdep.c:5005
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
 spin_lock include/linux/spinlock.h:354 [inline]
 nf_conntrack_lock net/netfilter/nf_conntrack_core.c:91 [inline]
 nf_conntrack_double_lock.constprop.0+0xce/0x1d0 net/netfilter/nf_conntrack_core.c:134
 nf_ct_delete_from_lists+0xc0/0x340 net/netfilter/nf_conntrack_core.c:646
 nf_ct_delete net/netfilter/nf_conntrack_core.c:678 [inline]
 nf_ct_delete+0x2fa/0x4a0 net/netfilter/nf_conntrack_core.c:656
 nf_ct_kill include/net/netfilter/nf_conntrack.h:214 [inline]
 nf_ct_gc_expired+0x1e4/0x240 net/netfilter/nf_conntrack_core.c:720
 ____nf_conntrack_find net/netfilter/nf_conntrack_core.c:748 [inline]
 __nf_conntrack_find_get+0x313/0xf30 net/netfilter/nf_conntrack_core.c:778
 resolve_normal_ct net/netfilter/nf_conntrack_core.c:1672 [inline]
 nf_conntrack_in+0x484/0x12a0 net/netfilter/nf_conntrack_core.c:1834
 ipv4_conntrack_local+0x11c/0x220 net/netfilter/nf_conntrack_proto.c:200
 nf_hook_entry_hookfn include/linux/netfilter.h:136 [inline]
 nf_hook_slow+0xc5/0x1e0 net/netfilter/core.c:512
 nf_hook+0x2b8/0x540 include/linux/netfilter.h:256
 __ip_local_out+0x26e/0x530 net/ipv4/ip_output.c:114
 ip_local_out+0x26/0x1a0 net/ipv4/ip_output.c:123
 iptunnel_xmit+0x5a0/0x9b0 net/ipv4/ip_tunnel_core.c:82
 geneve_xmit_skb drivers/net/geneve.c:956 [inline]
 geneve_xmit+0x11a2/0x2d30 drivers/net/geneve.c:1055
 __netdev_start_xmit include/linux/netdevice.h:4634 [inline]
 netdev_start_xmit include/linux/netdevice.h:4648 [inline]
 xmit_one net/core/dev.c:3561 [inline]
 dev_hard_start_xmit+0x193/0x950 net/core/dev.c:3577
 __dev_queue_xmit+0x2091/0x2d60 net/core/dev.c:4136
 neigh_hh_output include/net/neighbour.h:498 [inline]
 neigh_output include/net/neighbour.h:507 [inline]
 ip6_finish_output2+0x7f1/0x17b0 net/ipv6/ip6_output.c:117
 __ip6_finish_output net/ipv6/ip6_output.c:143 [inline]
 __ip6_finish_output+0x447/0xab0 net/ipv6/ip6_output.c:128
 ip6_finish_output+0x34/0x1f0 net/ipv6/ip6_output.c:153
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip6_output+0x1db/0x520 net/ipv6/ip6_output.c:176
 dst_output include/net/dst.h:443 [inline]
 NF_HOOK include/linux/netfilter.h:301 [inline]
 ndisc_send_skb+0xa69/0x1720 net/ipv6/ndisc.c:506
 ndisc_send_rs+0x12e/0x700 net/ipv6/ndisc.c:700
 addrconf_rs_timer+0x2ec/0x7c0 net/ipv6/addrconf.c:3887
 call_timer_fn+0x1ac/0x760 kernel/time/timer.c:1413
 expire_timers kernel/time/timer.c:1458 [inline]
 __run_timers.part.0+0x67c/0xaa0 kernel/time/timer.c:1755
 __run_timers kernel/time/timer.c:1736 [inline]
 run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1768
 __do_softirq+0x2de/0xa24 kernel/softirq.c:298
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x9d/0xd0 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:393 [inline]
 __irq_exit_rcu kernel/softirq.c:423 [inline]
 irq_exit_rcu+0x1f3/0x230 kernel/softirq.c:435
 sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:770 [inline]
RIP: 0010:lock_acquire+0x27b/0xad0 kernel/locking/lockdep.c:5008
Code: 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 f8 06 00 00 48 83 3d 0a eb 5b 08 00 0f 84 a6 05 00 00 48 8b 7c 24 08 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 03 44 24 10 48 c7
RSP: 0018:ffffc900088a7b80 EFLAGS: 00000282
RAX: 1ffffffff136c761 RBX: ffff888089198300 RCX: 00000000ed1a1bb4
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000282
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8c5d8a27
R10: fffffbfff18bb144 R11: 0000000000000000 R12: 0000000000000002
R13: ffffffff89bd6980 R14: 0000000000000000 R15: ffff888089198300
 rcu_lock_acquire include/linux/rcupdate.h:241 [inline]
 rcu_read_lock include/linux/rcupdate.h:634 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:407 [inline]
 batadv_nc_worker+0x12d/0xe50 net/batman-adv/network-coding.c:718
 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Kernel Offset: disabled
Rebooting in 86400 seconds..