rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (1 GPs behind) idle=eda/1/0x4000000000000000 softirq=12481/12483 fqs=23 
	(t=10500 jiffies g=13169 q=867)
rcu: rcu_preempt kthread starved for 10426 jiffies! g13169 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:R  running task     stack:29192 pid:   13 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4327 [inline]
 __schedule+0x90c/0x21a0 kernel/sched/core.c:5078
 schedule+0xcf/0x270 kernel/sched/core.c:5157
 schedule_timeout+0x148/0x250 kernel/time/timer.c:1878
 rcu_gp_fqs_loop kernel/rcu/tree.c:1940 [inline]
 rcu_gp_kthread+0xbbe/0x1d70 kernel/rcu/tree.c:2113
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
NMI backtrace for cpu 0
CPU: 0 PID: 10414 Comm: syz-executor.1 Not tainted 5.11.0-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+0xfa/0x151 lib/dump_stack.c:120
 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x1f4/0x230 kernel/rcu/tree_stall.h:337
 print_cpu_stall kernel/rcu/tree_stall.h:569 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:643 [inline]
 rcu_pending kernel/rcu/tree.c:3751 [inline]
 rcu_sched_clock_irq.cold+0x48e/0xedf kernel/rcu/tree.c:2580
 update_process_times+0x16d/0x200 kernel/time/timer.c:1782
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1369
 __run_hrtimer kernel/time/hrtimer.c:1519 [inline]
 __hrtimer_run_queues+0x1c0/0xe40 kernel/time/hrtimer.c:1583
 hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1645
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1106
 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:91 [inline]
 sysvec_apic_timer_interrupt+0x48/0x100 arch/x86/kernel/apic/apic.c:1100
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:fill_pool+0x6b/0x5c0 lib/debugobjects.c:136
Code: 24 38 70 5e c3 83 c7 00 f1 f1 f1 f1 c7 40 14 f3 f3 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 84 24 00 01 00 00 8b 05 05 37 ba 08 <39> 05 8f 23 01 0a 7f 4b 48 b8 00 00 00 00 00 fc ff df 4c 8b 24 24
RSP: 0018:ffffc90000007438 EFLAGS: 00000212
RAX: 000000000000012f RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff896cfd40 RDI: ffff88802b97be18
RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffffff8fa8185f
R10: fffffbfff1f5030b R11: 0000000000000000 R12: 1ffff92000000e8c
R13: 1ffff92000000ebe R14: 1ffff92000000ed3 R15: ffffffff896cfd40
 __debug_object_init+0x7a/0xd10 lib/debugobjects.c:560
 debug_object_init lib/debugobjects.c:615 [inline]
 debug_object_activate+0x32c/0x3e0 lib/debugobjects.c:701
 debug_rcu_head_queue kernel/rcu/rcu.h:176 [inline]
 __call_rcu kernel/rcu/tree.c:2951 [inline]
 call_rcu+0x2c/0x6d0 kernel/rcu/tree.c:3038
 dst_release net/core/dst.c:179 [inline]
 dst_release+0x79/0xe0 net/core/dst.c:169
 refdst_drop include/net/dst.h:261 [inline]
 skb_dst_drop include/net/dst.h:273 [inline]
 __dev_queue_xmit+0x1cf7/0x2e00 net/core/dev.c:4141
 neigh_hh_output include/net/neighbour.h:499 [inline]
 neigh_output include/net/neighbour.h:508 [inline]
 ip6_finish_output2+0x8d5/0x16b0 net/ipv6/ip6_output.c:117
 __ip6_finish_output net/ipv6/ip6_output.c:182 [inline]
 __ip6_finish_output+0x4c1/0xe10 net/ipv6/ip6_output.c:161
 ip6_finish_output+0x35/0x200 net/ipv6/ip6_output.c:192
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip6_output+0x1e4/0x530 net/ipv6/ip6_output.c:215
 dst_output include/net/dst.h:448 [inline]
 NF_HOOK include/linux/netfilter.h:301 [inline]
 ndisc_send_skb+0xa99/0x1750 net/ipv6/ndisc.c:508
 ndisc_send_rs+0x12e/0x6f0 net/ipv6/ndisc.c:702
 addrconf_rs_timer+0x3f2/0x820 net/ipv6/addrconf.c:3877
 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1417
 expire_timers kernel/time/timer.c:1462 [inline]
 __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1731
 __run_timers kernel/time/timer.c:1712 [inline]
 run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1744
 __do_softirq+0x29b/0x9f6 kernel/softirq.c:343
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:226 [inline]
 __irq_exit_rcu kernel/softirq.c:420 [inline]
 irq_exit_rcu+0x134/0x200 kernel/softirq.c:432
 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1100
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:199
Code: 0f 1f 44 00 00 55 48 8b 74 24 08 48 89 fd 48 83 c7 18 e8 ee 6c 57 f8 48 89 ef e8 c6 21 58 f8 e8 91 45 77 f8 fb bf 01 00 00 00 <e8> 56 21 4c f8 65 8b 05 1f b8 00 77 85 c0 74 02 5d c3 e8 ab 0d ff
RSP: 0018:ffffc900178ffb48 EFLAGS: 00000206
RAX: 00000000000092e7 RBX: 0000000000000402 RCX: 1ffffffff1b882d1
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001
RBP: ffff8880b9c34e00 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff81787d58 R11: 0000000000000000 R12: ffff8880b9c34e00
R13: ffff8880299f5340 R14: ffff88801b119500 R15: ffff8880241a8000
 finish_lock_switch kernel/sched/core.c:4079 [inline]
 finish_task_switch.isra.0+0x158/0x7e0 kernel/sched/core.c:4196
 context_switch kernel/sched/core.c:4330 [inline]
 __schedule+0x914/0x21a0 kernel/sched/core.c:5078
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:5238
 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:35
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
 _raw_spin_unlock_irqrestore+0x46/0x50 kernel/locking/spinlock.c:191
 spin_unlock_irqrestore include/linux/spinlock.h:409 [inline]
 force_sig_info_to_task+0x353/0x410 kernel/signal.c:1335
 force_sig_fault_to_task kernel/signal.c:1673 [inline]
 force_sig_fault+0xb0/0xf0 kernel/signal.c:1680
 __bad_area_nosemaphore+0x2e3/0x400 arch/x86/mm/fault.c:834
 do_user_addr_fault+0x988/0x1210 arch/x86/mm/fault.c:1347
 handle_page_fault arch/x86/mm/fault.c:1469 [inline]
 exc_page_fault+0x9e/0x180 arch/x86/mm/fault.c:1525
 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:580
RIP: 0033:0xe
Code: Unable to access opcode bytes at RIP 0xffffffffffffffe4.
RSP: 002b:00007f5965d24190 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 000000000056bf60 RCX: 0000000000465ef9
RDX: 0000000000042000 RSI: 0000000000000004 RDI: 0000000000000003
RBP: 00000000004bcd1c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffd69f5057f R14: 00007f5965d24300 R15: 0000000000022000