rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1):
------------[ cut here ]------------
WARNING: CPU: 1 PID: 16 at kernel/sched/core.c:3009 try_invoke_on_locked_down_task+0x18c/0x300 kernel/sched/core.c:3009
Modules linked in:
CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.10.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:try_invoke_on_locked_down_task+0x18c/0x300 kernel/sched/core.c:3009
Code: 00 00 00 0f 85 34 01 00 00 48 83 c4 70 44 89 f0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 65 8b 05 b8 77 b5 7e 85 c0 0f 85 15 ff ff ff <0f> 0b e9 0e ff ff ff 48 8d 74 24 30 48 89 ef 49 c7 c6 00 4d 03 00
RSP: 0018:ffffc90000d90938 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 1ffff920001b2129 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff815cc8d0 RDI: ffff888078f53480
RBP: ffff888078f53480 R08: 0000000000000033 R09: ffff8880b9f2005b
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff815cc8d0
R13: ffffc90000d90a60 R14: ffff888078f53480 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7dcef8f000 CR3: 000000001675e000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 rcu_print_task_stall kernel/rcu/tree_stall.h:267 [inline]
 print_other_cpu_stall kernel/rcu/tree_stall.h:475 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:634 [inline]
 rcu_pending kernel/rcu/tree.c:3694 [inline]
 rcu_sched_clock_irq.cold+0x97e/0xded kernel/rcu/tree.c:2567
 update_process_times+0x77/0xd0 kernel/time/timer.c:1709
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176
 tick_sched_timer+0x1d1/0x2a0 kernel/time/tick-sched.c:1328
 __run_hrtimer kernel/time/hrtimer.c:1519 [inline]
 __hrtimer_run_queues+0x1ce/0xea0 kernel/time/hrtimer.c:1583
 hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1645
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1097
 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:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x25/0x50 kernel/locking/spinlock.c:191
Code: f8 5d c3 66 90 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8 6a 19 6f f8 48 89 ef e8 d2 d9 6f f8 f6 c7 02 75 1a 53 9d <bf> 01 00 00 00 e8 11 2d 64 f8 65 8b 05 8a d7 1a 77 85 c0 74 0a 5b
RSP: 0018:ffffc90000d90e10 EFLAGS: 00000282
RAX: 0000000000a6562c RBX: 0000000000000282 RCX: 1ffffffff19d8a89
RDX: 0000000000000000 RSI: 0000000000000103 RDI: 0000000000000000
RBP: ffff8880b9f26840 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b9f26840
R13: ffff8880b9f26ac0 R14: ffffffff850eadd0 R15: dffffc0000000000
 __run_hrtimer kernel/time/hrtimer.c:1515 [inline]
 __hrtimer_run_queues+0x5c0/0xea0 kernel/time/hrtimer.c:1583
 hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1600
 __do_softirq+0x2a0/0x9f6 kernel/softirq.c:298
 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:393 [inline]
 __irq_exit_rcu kernel/softirq.c:423 [inline]
 irq_exit_rcu+0x132/0x200 kernel/softirq.c:435
 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631
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 ae 19 6f f8 48 89 ef e8 16 da 6f f8 e8 a1 c0 8e f8 fb bf 01 00 00 00 <e8> 56 2d 64 f8 65 8b 05 cf d7 1a 77 85 c0 74 02 5d c3 e8 6b 2d 19
RSP: 0018:ffffc90000d67d18 EFLAGS: 00000202
RAX: 0000000000a65619 RBX: ffff888010dc0000 RCX: 1ffffffff19d8a89
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001
RBP: ffff8880b9f34d00 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b9f34d00
R13: ffff888010db0000 R14: 0000000000000000 R15: 0000000000000000
 finish_lock_switch kernel/sched/core.c:3513 [inline]
 finish_task_switch+0x150/0x7a0 kernel/sched/core.c:3613
 context_switch kernel/sched/core.c:3777 [inline]
 __schedule+0x89b/0x2130 kernel/sched/core.c:4523
 schedule+0xcf/0x270 kernel/sched/core.c:4601
 smpboot_thread_fn+0x328/0x9e0 kernel/smpboot.c:161
 kthread+0x3af/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296