rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10499 ticks this GP) idle=16e/1/0x4000000000000004 softirq=25744/25745 fqs=544 
	(t=10501 jiffies g=35397 q=419)
rcu: rcu_preempt kthread starved for 9413 jiffies! g35397 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
rcu: RCU grace-period kthread stack dump:
rcu_preempt     I29256    10      2 0x80004000
Call Trace:
 context_switch kernel/sched/core.c:3254 [inline]
 __schedule+0x755/0x1580 kernel/sched/core.c:3880
 schedule+0xd9/0x260 kernel/sched/core.c:3947
 schedule_timeout+0x486/0xc50 kernel/time/timer.c:1807
 rcu_gp_fqs_loop kernel/rcu/tree.c:1611 [inline]
 rcu_gp_kthread+0x9b2/0x18c0 kernel/rcu/tree.c:1768
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
NMI backtrace for cpu 1
CPU: 1 PID: 16590 Comm: syz-executor.5 Not tainted 5.3.0-rc7+ #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+0x172/0x1f0 lib/dump_stack.c:113
 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:2736 [inline]
 rcu_sched_clock_irq.cold+0x4dd/0xc13 kernel/rcu/tree.c:2183
 update_process_times+0x32/0x80 kernel/time/timer.c:1639
 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:167
 tick_sched_timer+0x53/0x140 kernel/time/tick-sched.c:1296
 __run_hrtimer kernel/time/hrtimer.c:1389 [inline]
 __hrtimer_run_queues+0x364/0xe40 kernel/time/hrtimer.c:1451
 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1106 [inline]
 smp_apic_timer_interrupt+0x160/0x610 arch/x86/kernel/apic/apic.c:1131
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
RIP: 0010:__list_del_entry_valid+0x61/0xf5 lib/list_debug.c:48
Code: 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 9d 00 00 00 48 b8 00 01 00 00 00 00 ad de 4d 8b 2e 49 39 c5 0f 84 e1 00 00 00 <48> b8 22 01 00 00 00 00 ad de 49 39 c4 0f 84 e2 00 00 00 48 b8 00
RSP: 0000:ffff8880ae909160 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13
RAX: dead000000000100 RBX: ffff88808bc1ac38 RCX: ffffffff85c65ba9
RDX: 1ffff11011783587 RSI: ffffffff85c66076 RDI: ffff88808bc1ac40
RBP: ffff8880ae909178 R08: ffff88809251e480 R09: 0000000000000000
R10: fffffbfff134afa7 R11: ffff88809251e480 R12: ffff88808bc1acd0
R13: ffff88808bc1acd0 R14: ffff88808bc1ac38 R15: 0000000000000000
 __list_del_entry include/linux/list.h:131 [inline]
 list_move_tail include/linux/list.h:213 [inline]
 hhf_dequeue+0x5c5/0xa20 net/sched/sch_hhf.c:439
 dequeue_skb net/sched/sch_generic.c:263 [inline]
 qdisc_restart net/sched/sch_generic.c:366 [inline]
 __qdisc_run+0x1e5/0x1a00 net/sched/sch_generic.c:384
 __dev_xmit_skb net/core/dev.c:3533 [inline]
 __dev_queue_xmit+0x16f1/0x3650 net/core/dev.c:3838
 dev_queue_xmit+0x18/0x20 net/core/dev.c:3902
 arp_xmit_finish net/ipv4/arp.c:630 [inline]
 NF_HOOK include/linux/netfilter.h:305 [inline]
 NF_HOOK include/linux/netfilter.h:299 [inline]
 arp_xmit+0xdf/0x3f0 net/ipv4/arp.c:639
 arp_send_dst.part.0+0x202/0x280 net/ipv4/arp.c:317
 arp_send_dst net/ipv4/arp.c:390 [inline]
 arp_solicit+0x752/0x1380 net/ipv4/arp.c:389
 neigh_probe+0xc6/0x110 net/core/neighbour.c:1012
 __neigh_event_send+0x3e3/0x1760 net/core/neighbour.c:1172
 neigh_event_send include/net/neighbour.h:445 [inline]
 neigh_resolve_output+0x5cf/0x970 net/core/neighbour.c:1474
 neigh_output include/net/neighbour.h:511 [inline]
 ip_finish_output2+0x8a5/0x2570 net/ipv4/ip_output.c:228
 __ip_finish_output net/ipv4/ip_output.c:308 [inline]
 __ip_finish_output+0x5fc/0xb90 net/ipv4/ip_output.c:290
 ip_finish_output+0x38/0x1f0 net/ipv4/ip_output.c:318
 NF_HOOK_COND include/linux/netfilter.h:294 [inline]
 ip_output+0x21f/0x640 net/ipv4/ip_output.c:432
 dst_output include/net/dst.h:436 [inline]
 ip_local_out+0xbb/0x190 net/ipv4/ip_output.c:125
 __ip_queue_xmit+0x86f/0x1bd0 net/ipv4/ip_output.c:532
 ip_queue_xmit+0x5a/0x70 include/net/ip.h:236
 dccp_transmit_skb+0x966/0x1290 net/dccp/output.c:138
 dccp_retransmit_skb+0x118/0x170 net/dccp/output.c:387
 dccp_retransmit_timer net/dccp/timer.c:101 [inline]
 dccp_write_timer+0x43f/0x1420 net/dccp/timer.c:153
 call_timer_fn+0x1ac/0x780 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+0x697/0x17a0 kernel/time/timer.c:1698
 __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:537 [inline]
 smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1133
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
 </IRQ>
RIP: 0033:0x40e89d
Code: f8 4c 39 c1 49 89 ee 77 2c 48 83 e8 08 48 39 ca 76 0f 0f 1f 00 48 83 e8 08 48 8b 10 48 39 ca 77 f4 48 39 e8 76 18 48 89 57 f8 <4c> 89 00 48 8b 50 f8 49 8b 0c 24 4c 8b 07 48 83 c7 08 eb bf 4c 89
RSP: 002b:00007ffcfb469ed0 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13
RAX: 00007f57dbe3c248 RBX: 00007f57dbc56018 RCX: ffffffff81c4af37
RDX: ffffffff8177ef3f RSI: 00007f57dbe56000 RDI: 00007f57dbc68dd8
RBP: 00007f57dbc68dd0 R08: ffffffff81f8562d R09: 0000000077580f41
R10: 00007ffcfb46a070 R11: 0000000000000246 R12: 00007f57dbc56008
R13: 0000000000000021 R14: 00007f57dbc68dd0 R15: 000000000003ffff