rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	3-....: (10500 ticks this GP) idle=e4a/1/0x4000000000000004 softirq=8902/8902 fqs=4999 
	(t=10500 jiffies g=7153 q=1557)
NMI backtrace for cpu 3
CPU: 3 PID: 8392 Comm: syz-executor.2 Not tainted 5.4.0-syzkaller #0
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x197/0x210 lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x70/0xb2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x23b/0x28b lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x183/0x1cf kernel/rcu/tree_stall.h:254
 print_cpu_stall kernel/rcu/tree_stall.h:455 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:529 [inline]
 rcu_pending kernel/rcu/tree.c:2827 [inline]
 rcu_sched_clock_irq.cold+0x509/0xc02 kernel/rcu/tree.c:2271
 update_process_times+0x2d/0x70 kernel/time/timer.c:1726
 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:167
 tick_sched_timer+0x53/0x140 kernel/time/tick-sched.c:1310
 __run_hrtimer kernel/time/hrtimer.c:1514 [inline]
 __hrtimer_run_queues+0x364/0xe40 kernel/time/hrtimer.c:1576
 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1638
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline]
 smp_apic_timer_interrupt+0x160/0x610 arch/x86/kernel/apic/apic.c:1135
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
RIP: 0010:icmp6_send+0x0/0x1f90 net/ipv6/icmp.c:425
Code: 44 89 45 c0 e8 61 4f 37 fb 44 8b 45 c0 e9 9e fe ff ff 4c 89 f7 e8 b0 4e 37 fb e9 58 fe ff ff 90 66 2e 0f 1f 84 00 00 00 00 00 <4c> 8d 54 24 08 48 83 e4 f0 41 ff 72 f8 55 48 89 e5 48 8d 85 50 fe
RSP: 0018:ffff88807ed09388 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffff888061be4580 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000003 RSI: 0000000000000001 RDI: ffff88806bee9200
RBP: ffff88807ed093c0 R08: 0000000000000000 R09: ffffed100fda7045
R10: ffffed100fda7044 R11: ffff88807ed38223 R12: 0000000000000003
R13: ffff88806bee9200 R14: 0000000000000000 R15: ffffffff867abd00
 ip6_link_failure+0x2b/0x530 net/ipv6/route.c:2641
 dst_link_failure include/net/dst.h:419 [inline]
 vti_xmit net/ipv4/ip_vti.c:243 [inline]
 vti_tunnel_xmit+0x7d9/0x17a0 net/ipv4/ip_vti.c:279
 __netdev_start_xmit include/linux/netdevice.h:4442 [inline]
 netdev_start_xmit include/linux/netdevice.h:4456 [inline]
 xmit_one net/core/dev.c:3420 [inline]
 dev_hard_start_xmit+0x1a3/0x9b0 net/core/dev.c:3436
 __dev_queue_xmit+0x2b05/0x35c0 net/core/dev.c:4013
 dev_queue_xmit+0x18/0x20 net/core/dev.c:4046
 neigh_direct_output+0x16/0x20 net/core/neighbour.c:1530
 neigh_output include/net/neighbour.h:511 [inline]
 ip6_finish_output2+0x109a/0x25c0 net/ipv6/ip6_output.c:116
 __ip6_finish_output+0x444/0xaa0 net/ipv6/ip6_output.c:142
 ip6_finish_output+0x38/0x1f0 net/ipv6/ip6_output.c:152
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip6_output+0x25e/0x880 net/ipv6/ip6_output.c:175
 dst_output include/net/dst.h:436 [inline]
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ndisc_send_skb+0xf1f/0x1490 net/ipv6/ndisc.c:505
 ndisc_send_rs+0x134/0x720 net/ipv6/ndisc.c:699
 addrconf_rs_timer+0x30f/0x6e0 net/ipv6/addrconf.c:3879
 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1404
 expire_timers kernel/time/timer.c:1449 [inline]
 __run_timers kernel/time/timer.c:1773 [inline]
 __run_timers kernel/time/timer.c:1740 [inline]
 run_timer_softirq+0x6c3/0x1790 kernel/time/timer.c:1786
 __do_softirq+0x262/0x98c kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x19b/0x1e0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1137
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x4f/0x80 kernel/locking/spinlock.c:199
Code: c0 68 34 13 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 33 48 83 3d 12 6a 96 01 00 74 20 fb 66 0f 1f 44 00 00 <bf> 01 00 00 00 e8 e7 ab d3 f9 65 8b 05 18 54 85 78 85 c0 74 06 41
RSP: 0018:ffff888061bdf7f8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff122668d RBX: ffff888061be4580 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffff888061be4e14
RBP: ffff888061bdf800 R08: ffff888061be4580 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88807ed37380
R13: ffff888061a74500 R14: 0000000000000000 R15: 0000000000000001
 finish_lock_switch kernel/sched/core.c:3124 [inline]
 finish_task_switch+0x147/0x750 kernel/sched/core.c:3224
 context_switch kernel/sched/core.c:3388 [inline]
 __schedule+0x8e9/0x1f30 kernel/sched/core.c:4081
 preempt_schedule_common+0x4f/0xe0 kernel/sched/core.c:4236
 preempt_schedule+0x4b/0x60 kernel/sched/core.c:4261
 ___preempt_schedule+0x16/0x18 arch/x86/entry/thunk_64.S:50
 try_to_wake_up+0xbcc/0x1a80 kernel/sched/core.c:2650
 wake_up_process kernel/sched/core.c:2668 [inline]
 wake_up_q+0xb2/0x140 kernel/sched/core.c:496
 futex_wake+0x429/0x4d0 kernel/futex.c:1696
 do_futex+0x358/0x1de0 kernel/futex.c:3886
 __do_sys_futex kernel/futex.c:3942 [inline]
 __se_sys_futex kernel/futex.c:3910 [inline]
 __x64_sys_futex+0x3f7/0x590 kernel/futex.c:3910
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a759
Code: bd b1 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 8b b1 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fadc8170cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 000000000071bfb0 RCX: 000000000045a759
RDX: 00000000004ae22d RSI: 0000000000000081 RDI: 000000000071bfb4
RBP: 000000000071bfa8 R08: 0000000000000002 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 000000000071bfb4
R13: 00007fff13499e6f R14: 00007fadc8151000 R15: 0000000000000003