rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (1 GPs behind) idle=b3e/1/0x4000000000000000 softirq=11666/11673 fqs=0 
	(t=11450 jiffies g=8761 q=652)
rcu: rcu_preempt kthread timer wakeup didn't happen for 11449 jiffies! g8761 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=26514
rcu: rcu_preempt kthread starved for 11450 jiffies! g8761 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:I stack:26352 pid:   14 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4339 [inline]
 __schedule+0xb98/0x1120 kernel/sched/core.c:5147
 schedule+0x14b/0x200 kernel/sched/core.c:5226
 schedule_timeout+0x1aa/0x2c0 kernel/time/timer.c:1892
 rcu_gp_fqs_loop kernel/rcu/tree.c:2004 [inline]
 rcu_gp_kthread+0x112d/0x2190 kernel/rcu/tree.c:2177
 kthread+0x39a/0x3c0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 9622 Comm: kworker/0:4 Not tainted 5.13.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_power_efficient toggle_allocation_gate
RIP: 0010:debug_spin_unlock kernel/locking/spinlock_debug.c:97 [inline]
RIP: 0010:do_raw_spin_unlock+0x2b/0x8a0 kernel/locking/spinlock_debug.c:138
Code: 41 57 41 56 41 55 41 54 53 48 83 ec 28 49 89 ff 48 bb 00 00 00 00 00 fc ff df 48 8d 57 04 48 89 d0 48 c1 e8 03 48 89 44 24 10 <8a> 04 18 84 c0 48 89 14 24 0f 85 2e 04 00 00 81 3a ad 4e ad de 0f
RSP: 0018:ffffc90000007c20 EFLAGS: 00000803
RAX: 1ffff11017344c38 RBX: dffffc0000000000 RCX: 0000000000007b03
RDX: ffff8880b9a261c4 RSI: 0000000000010002 RDI: ffff8880b9a261c0
RBP: ffffc90000007d10 R08: dffffc0000000000 R09: fffffbfff1c70546
R10: fffffbfff1c70546 R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff92000000f90 R14: ffffc90000007ca0 R15: ffff8880b9a261c0
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004bd370 CR3: 000000000cc8e000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:159 [inline]
 _raw_spin_unlock_irqrestore+0x7d/0x120 kernel/locking/spinlock.c:191
 __run_hrtimer kernel/time/hrtimer.c:1533 [inline]
 __hrtimer_run_queues+0x487/0xa60 kernel/time/hrtimer.c:1601
 hrtimer_interrupt+0x3b3/0x1040 kernel/time/hrtimer.c:1663
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
 __sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1106
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647
RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline]
RIP: 0010:smp_call_function_many_cond+0xa92/0xd60 kernel/smp.c:967
Code: ff e8 e2 94 0b 00 41 83 e7 01 49 bf 00 00 00 00 00 fc ff df 75 12 e8 bd 90 0b 00 eb 50 66 66 2e 0f 1f 84 00 00 00 00 00 f3 90 <42> 0f b6 04 3b 84 c0 75 11 41 f7 45 00 01 00 00 00 74 2b e8 96 90
RSP: 0018:ffffc9000a92f820 EFLAGS: 00000293
RAX: ffffffff81737a5a RBX: 1ffff110173674ad RCX: ffff88803b9d3880
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000a92f960 R08: ffffffff81737a1e R09: ffffffff841d12f0
R10: 0000000000000009 R11: ffff88803b9d3880 R12: 0000000000000001
R13: ffff8880b9b3a568 R14: 1ffff11017346c28 R15: dffffc0000000000
 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1133
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:929 [inline]
 text_poke_bp_batch+0x310/0x940 arch/x86/kernel/alternative.c:1114
 text_poke_flush arch/x86/kernel/alternative.c:1268 [inline]
 text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1275
 arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:122
 static_key_disable_cpuslocked+0xcc/0x1b0 kernel/jump_label.c:207
 static_key_disable+0x16/0x20 kernel/jump_label.c:215
 toggle_allocation_gate+0x3a8/0x440 mm/kfence/core.c:637
 process_one_work+0x833/0x10c0 kernel/workqueue.c:2276
 worker_thread+0xac1/0x1300 kernel/workqueue.c:2422
 kthread+0x39a/0x3c0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
NMI backtrace for cpu 1
CPU: 1 PID: 19 Comm: ksoftirqd/1 Not tainted 5.13.0-rc5-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:79 [inline]
 dump_stack+0x202/0x31e lib/dump_stack.c:120
 nmi_cpu_backtrace+0x16c/0x190 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x191/0x2f0 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x22d/0x390 kernel/rcu/tree_stall.h:341
 print_cpu_stall kernel/rcu/tree_stall.h:624 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:699 [inline]
 rcu_pending kernel/rcu/tree.c:3911 [inline]
 rcu_sched_clock_irq+0x1d0d/0x2a30 kernel/rcu/tree.c:2649
 update_process_times+0x197/0x200 kernel/time/timer.c:1796
 tick_sched_handle kernel/time/tick-sched.c:226 [inline]
 tick_sched_timer+0x27d/0x420 kernel/time/tick-sched.c:1373
 __run_hrtimer kernel/time/hrtimer.c:1537 [inline]
 __hrtimer_run_queues+0x4cb/0xa60 kernel/time/hrtimer.c:1601
 hrtimer_interrupt+0x3b3/0x1040 kernel/time/hrtimer.c:1663
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
 __sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1106
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647
RIP: 0010:rt6_score_route+0x65/0x340 net/ipv6/route.c:710
Code: 38 00 74 08 4c 89 f7 e8 39 de 22 f9 bd d0 00 00 00 49 03 2e 48 89 e8 48 c1 e8 03 42 8a 04 38 84 c0 0f 85 7f 02 00 00 8b 6d 00 <89> ef 89 de e8 42 d3 da f8 39 dd 75 1e 4c 89 fd e8 96 d1 da f8 bb
RSP: 0018:ffffc90000d96f50 EFLAGS: 00000246
RAX: 1ffff11004399000 RBX: 000000000000001e RCX: ffff888012bf54c0
RDX: ffff888012bf54c0 RSI: 000000000000001e RDI: 0000000000000000
RBP: 0000000000000004 R08: ffffffff88a4390d R09: ffffc90000d97290
R10: 0000000000000002 R11: ffff888012bf54c0 R12: 0000000000000001
R13: 0000000000000003 R14: ffff888021ca54a0 R15: dffffc0000000000
 find_match+0x1ed/0xae0 net/ipv6/route.c:742
 __find_rr_leaf+0x271/0x930 net/ipv6/route.c:825
 find_rr_leaf net/ipv6/route.c:846 [inline]
 rt6_select net/ipv6/route.c:890 [inline]
 fib6_table_lookup+0x477/0xb40 net/ipv6/route.c:2174
 ip6_pol_route+0x1da/0x1b90 net/ipv6/route.c:2210
 pol_lookup_func include/net/ip6_fib.h:579 [inline]
 fib6_rule_lookup+0x264/0x600 net/ipv6/fib6_rules.c:115
 ip6_route_input_lookup net/ipv6/route.c:2280 [inline]
 ip6_route_input+0x833/0xc10 net/ipv6/route.c:2449
 ip6_rcv_finish+0x131/0x240 net/ipv6/ip6_input.c:74
 __netif_receive_skb_one_core net/core/dev.c:5459 [inline]
 __netif_receive_skb+0x1d1/0x500 net/core/dev.c:5573
 process_backlog+0x4d8/0x950 net/core/dev.c:6437
 __napi_poll+0xba/0x4f0 net/core/dev.c:6985
 napi_poll net/core/dev.c:7052 [inline]
 net_rx_action+0x62c/0xf30 net/core/dev.c:7139
 __do_softirq+0x372/0x7a6 kernel/softirq.c:559
 run_ksoftirqd+0xa2/0x100 kernel/softirq.c:921
 smpboot_thread_fn+0x618/0xa50 kernel/smpboot.c:165
 kthread+0x39a/0x3c0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294