rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=01e/1/0x4000000000000004 softirq=35029/35030 fqs=5224 
	(t=10502 jiffies g=53581 q=3523)
NMI backtrace for cpu 1
CPU: 1 PID: 11982 Comm: syz-executor.1 Not tainted 5.4.0-rc6 #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+0x1d8/0x2f8 lib/dump_stack.c:113
 nmi_cpu_backtrace+0xaf/0x1a0 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x174/0x290 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x10/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x15a/0x220 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:2795 [inline]
 rcu_sched_clock_irq+0xe22/0x1ae0 kernel/rcu/tree.c:2244
 update_process_times+0x12d/0x180 kernel/time/timer.c:1726
 tick_sched_handle kernel/time/tick-sched.c:167 [inline]
 tick_sched_timer+0x263/0x420 kernel/time/tick-sched.c:1299
 __run_hrtimer kernel/time/hrtimer.c:1514 [inline]
 __hrtimer_run_queues+0x403/0x840 kernel/time/hrtimer.c:1576
 hrtimer_interrupt+0x38c/0xda0 kernel/time/hrtimer.c:1638
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline]
 smp_apic_timer_interrupt+0x109/0x280 arch/x86/kernel/apic/apic.c:1135
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
RIP: 0010:in6_dev_get+0x0/0x1c0 include/net/addrconf.h:351
Code: 80 e1 07 80 c1 03 38 d1 0f 8c e1 fe ff ff 48 89 df 49 89 c7 e8 01 eb 27 fb 4c 89 f8 e9 ce fe ff ff 66 0f 1f 84 00 00 00 00 00 <55> 48 89 e5 41 56 53 49 89 fe e8 81 aa ee fa e8 3c 6a dc fa 48 c7
RSP: 0000:ffff8880aeb09810 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13
RAX: ffff8880453643c0 RBX: ffff888099796000 RCX: 0000000000000300
RDX: 0000000000000300 RSI: 00000000000000ff RDI: ffff888099796000
RBP: ffff8880aeb09878 R08: ffffffff8683e310 R09: ffffed1011b73859
R10: ffffed1011b73859 R11: 0000000000000000 R12: ffff88808db9c000
R13: 00000000000000ff R14: dffffc0000000000 R15: ffff88808db9c2b8
 ___neigh_create+0x9a9/0x1a60 net/core/neighbour.c:598
 __neigh_create+0x2f/0x40 net/core/neighbour.c:674
 ip6_finish_output2+0x940/0x13b0 net/ipv6/ip6_output.c:113
 __ip6_finish_output+0x693/0x8c0 net/ipv6/ip6_output.c:142
 ip6_finish_output+0x52/0x1e0 net/ipv6/ip6_output.c:152
 NF_HOOK_COND include/linux/netfilter.h:294 [inline]
 ip6_output+0x26f/0x370 net/ipv6/ip6_output.c:175
 dst_output include/net/dst.h:436 [inline]
 NF_HOOK include/linux/netfilter.h:305 [inline]
 ndisc_send_skb+0xa35/0xe20 net/ipv6/ndisc.c:505
 ndisc_send_rs+0x4ec/0x680 net/ipv6/ndisc.c:699
 addrconf_rs_timer+0x22e/0x5f0 net/ipv6/addrconf.c:3879
 call_timer_fn+0x95/0x170 kernel/time/timer.c:1404
 expire_timers kernel/time/timer.c:1449 [inline]
 __run_timers+0x7b6/0x990 kernel/time/timer.c:1773
 run_timer_softirq+0x4a/0x90 kernel/time/timer.c:1786
 __do_softirq+0x333/0x7c4 arch/x86/include/asm/paravirt.h:766
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x227/0x230 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x113/0x280 arch/x86/kernel/apic/apic.c:1137
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
 </IRQ>
RIP: 0033:0x405639
Code: d2 e8 db eb ff ff 48 8d 5d 08 4c 8d 65 0c eb 18 90 45 31 c0 31 c9 ba 80 00 00 00 48 89 de bf ca 00 00 00 e8 c9 4b 05 00 8b 03 <85> c0 74 e3 48 89 ef c7 45 08 00 00 00 00 e8 84 fb ff ff 4c 89 e7
RSP: 002b:00007f65a804ed00 EFLAGS: 00000217 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000001 RBX: 000000000075bfd0 RCX: 000000000045a219
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075bfd0
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075bfd4
R13: 00007fffad8aa60f R14: 00007f65a804f9c0 R15: 000000000075bfd4