------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(1)
WARNING: CPU: 0 PID: 0 at kernel/locking/lockdep.c:167 hlock_class kernel/locking/lockdep.c:167 [inline]
WARNING: CPU: 0 PID: 0 at kernel/locking/lockdep.c:167 mark_lock+0x7c4/0x11d0 kernel/locking/lockdep.c:3643
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x113/0x167 lib/dump_stack.c:113
 panic+0x22a/0x4e3 kernel/panic.c:221
 __warn.cold.11+0x25/0x30 kernel/panic.c:582
 report_bug+0x1b0/0x270 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:291
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1028
RIP: 0010:hlock_class kernel/locking/lockdep.c:167 [inline]
RIP: 0010:mark_lock+0x7c4/0x11d0 kernel/locking/lockdep.c:3643
Code: d2 0f 85 09 09 00 00 44 8b 1d 68 a3 5c 08 45 85 db 0f 85 1d fa ff ff 48 c7 c6 e0 a0 8a 87 48 c7 c7 20 a1 8a 87 e8 7e f9 ec ff <0f> 0b e9 03 fa ff ff 48 c7 c7 34 ec ad 89 48 b8 00 00 00 00 00 fc
RSP: 0018:ffff8880ae809380 EFLAGS: 00010086
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000
RBP: ffff8880ae8093d0 R08: fffffbfff11b2389 R09: fffffbfff11b2389
R10: fffffbfff11b2388 R11: ffffffff88d91c43 R12: ffffffff88c7a100
R13: 0000000000000000 R14: ffffffff88c7aaaa R15: ffffffff88c7aa88
 mark_usage kernel/locking/lockdep.c:3566 [inline]
 __lock_acquire+0x1974/0x4ef0 kernel/locking/lockdep.c:3909
 lock_acquire+0x194/0x410 kernel/locking/lockdep.c:4487
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:151
 spin_lock include/linux/spinlock.h:338 [inline]
 __netif_tx_lock include/linux/netdevice.h:3898 [inline]
 sch_direct_xmit+0x215/0x1110 net/sched/sch_generic.c:311
 __dev_xmit_skb net/core/dev.c:3400 [inline]
 __dev_queue_xmit+0x1fc8/0x3050 net/core/dev.c:3761
 dev_queue_xmit+0xb/0x10 net/core/dev.c:3825
 neigh_hh_output include/net/neighbour.h:500 [inline]
 neigh_output include/net/neighbour.h:509 [inline]
 ip6_finish_output2+0xc34/0x22f0 net/ipv6/ip6_output.c:116
 __ip6_finish_output+0x36c/0x930 net/ipv6/ip6_output.c:142
 ip6_finish_output+0x27/0x170 net/ipv6/ip6_output.c:152
 NF_HOOK_COND include/linux/netfilter.h:294 [inline]
 ip6_output+0x1bf/0x630 net/ipv6/ip6_output.c:175
 dst_output include/net/dst.h:436 [inline]
 NF_HOOK include/linux/netfilter.h:305 [inline]
 mld_sendpack+0x870/0xcb0 net/ipv6/mcast.c:1682
 mld_send_initial_cr.part.32+0xd7/0x110 net/ipv6/mcast.c:2099
 mld_send_initial_cr net/ipv6/mcast.c:2083 [inline]
 mld_dad_timer_expire+0x29/0x140 net/ipv6/mcast.c:2118
 call_timer_fn+0x169/0x570 kernel/time/timer.c:1404
 expire_timers kernel/time/timer.c:1449 [inline]
 __run_timers kernel/time/timer.c:1773 [inline]
 run_timer_softirq+0xd58/0x1330 kernel/time/timer.c:1786
 __do_softirq+0x262/0x9a8 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x19a/0x1d0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x1a6/0x5f0 arch/x86/kernel/apic/apic.c:1137
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
 </IRQ>
RIP: 0010:native_safe_halt+0x12/0x20 arch/x86/include/asm/irqflags.h:61
Code: fe ff ff 48 89 df e8 4d a1 6f fa eb 9c 90 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 e9 07 00 00 00 0f 00 2d 30 41 5b 00 fb f4 <5d> c3 66 90 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 e9 07 00 00
RSP: 0018:ffffffff88c07ce0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: ffffffff88c7a100 RCX: 0000000000000000
RDX: 1ffffffff11a58ff RSI: 0000000000000006 RDI: ffffffff88d2c7f8
RBP: ffffffff88c07ce0 R08: 0000000000000006 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: fffffbfff11a58fd
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 arch_safe_halt arch/x86/include/asm/paravirt.h:144 [inline]
 default_idle+0x51/0x340 arch/x86/kernel/process.c:580
 arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:571
 default_idle_call+0x87/0xa0 kernel/sched/idle.c:94
 cpuidle_idle_call kernel/sched/idle.c:154 [inline]
 do_idle+0x4c6/0x6d0 kernel/sched/idle.c:263
 cpu_startup_entry+0x18/0x20 kernel/sched/idle.c:355
 rest_init+0x1a4/0x279 init/main.c:451
 arch_call_rest_init+0x9/0xc
 start_kernel+0x72b/0x766 init/main.c:784
 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:472
 x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:453
 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241
Kernel Offset: disabled
Rebooting in 86400 seconds..