node 0: slabs: 135104, objs: 1621248, free: 0
  node 1: slabs: 247541, objs: 2970492, free: 48
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10180 ticks this GP) idle=ffe/1/0x4000000000000000 softirq=19332/19332 fqs=31 
	(t=10500 jiffies g=17061 q=108908)
NMI backtrace for cpu 1
CPU: 1 PID: 18 Comm: ksoftirqd/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+0x9a/0xcc lib/dump_stack.c:120
 nmi_cpu_backtrace.cold+0x30/0x99 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x11f/0x170 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+0x13b/0x1c0 kernel/time/timer.c:1782
 tick_sched_handle+0x6f/0x130 kernel/time/tick-sched.c:226
 tick_sched_timer+0x132/0x210 kernel/time/tick-sched.c:1369
 __run_hrtimer kernel/time/hrtimer.c:1519 [inline]
 __hrtimer_run_queues+0x18a/0xb00 kernel/time/hrtimer.c:1583
 hrtimer_interrupt+0x300/0x930 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
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_sysvec_on_irqstack arch/x86/include/asm/irq_stack.h:37 [inline]
 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:89 [inline]
 sysvec_apic_timer_interrupt+0xbd/0x100 arch/x86/kernel/apic/apic.c:1100
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:629
RIP: 0010:lock_is_held_type+0xe8/0x120 kernel/locking/lockdep.c:5486
Code: 03 44 39 f0 41 0f 94 c5 48 c7 c7 20 fa 8a 88 e8 ce 0e 00 00 b8 ff ff ff ff 65 0f c1 05 e1 63 cd 77 83 f8 01 75 1b ff 34 24 9d <48> 83 c4 08 44 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 45 31 ed eb
RSP: 0018:ffffc90000d87b88 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff888afa20 RDI: ffffffff88ddc5c0
RBP: ffffffff8a76ac80 R08: 0000000000000000 R09: ffffffff8c33350f
R10: fffffbfff18666a1 R11: dffffc0000000000 R12: ffff88801021b800
R13: 0000000000000000 R14: 00000000ffffffff R15: ffff88801021c1e0
 lock_is_held include/linux/lockdep.h:271 [inline]
 rcu_read_lock_sched_held+0x3a/0x70 kernel/rcu/update.c:123
 trace_timer_expire_exit include/trace/events/timer.h:125 [inline]
 call_timer_fn+0x447/0x4b0 kernel/time/timer.c:1418
 expire_timers kernel/time/timer.c:1462 [inline]
 __run_timers.part.0+0x52a/0x8b0 kernel/time/timer.c:1731
 __run_timers kernel/time/timer.c:1712 [inline]
 run_timer_softirq+0x9c/0x190 kernel/time/timer.c:1744
 __do_softirq+0x29b/0x9f6 kernel/softirq.c:343
 run_ksoftirqd kernel/softirq.c:650 [inline]
 run_ksoftirqd+0x2d/0x50 kernel/softirq.c:642
 smpboot_thread_fn+0x561/0x8e0 kernel/smpboot.c:165
 kthread+0x36f/0x450 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
----------------
Code disassembly (best guess):
   0:	03 44 39 f0          	add    -0x10(%rcx,%rdi,1),%eax
   4:	41 0f 94 c5          	sete   %r13b
   8:	48 c7 c7 20 fa 8a 88 	mov    $0xffffffff888afa20,%rdi
   f:	e8 ce 0e 00 00       	callq  0xee2
  14:	b8 ff ff ff ff       	mov    $0xffffffff,%eax
  19:	65 0f c1 05 e1 63 cd 	xadd   %eax,%gs:0x77cd63e1(%rip)        # 0x77cd6402
  20:	77
  21:	83 f8 01             	cmp    $0x1,%eax
  24:	75 1b                	jne    0x41
  26:	ff 34 24             	pushq  (%rsp)
  29:	9d                   	popfq
* 2a:	48 83 c4 08          	add    $0x8,%rsp <-- trapping instruction
  2e:	44 89 e8             	mov    %r13d,%eax
  31:	5b                   	pop    %rbx
  32:	5d                   	pop    %rbp
  33:	41 5c                	pop    %r12
  35:	41 5d                	pop    %r13
  37:	41 5e                	pop    %r14
  39:	41 5f                	pop    %r15
  3b:	c3                   	retq
  3c:	45 31 ed             	xor    %r13d,%r13d
  3f:	eb                   	.byte 0xeb