rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (1 GPs behind) idle=1ba/1/0x4000000000000000 softirq=95855/95856 fqs=9 
	(t=10501 jiffies g=155093 q=980)
NMI backtrace for cpu 1
CPU: 1 PID: 22505 Comm: syz-executor.5 Not tainted 5.14.0-rc6-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:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105
 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+0x25e/0x3f0 kernel/rcu/tree_stall.h:342
 print_cpu_stall kernel/rcu/tree_stall.h:625 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:700 [inline]
 rcu_pending kernel/rcu/tree.c:3922 [inline]
 rcu_sched_clock_irq.cold+0x9f/0x747 kernel/rcu/tree.c:2641
 update_process_times+0x16d/0x200 kernel/time/timer.c:1785
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1421
 __run_hrtimer kernel/time/hrtimer.c:1537 [inline]
 __hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1601
 hrtimer_interrupt+0x330/0xa00 kernel/time/hrtimer.c:1663
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1106
 sysvec_apic_timer_interrupt+0x40/0xc0 arch/x86/kernel/apic/apic.c:1100
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:191
Code: 74 24 10 e8 1a f7 2c f8 48 89 ef e8 c2 6c 2d f8 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 <e8> e3 4a 21 f8 65 8b 05 bc 91 d4 76 85 c0 74 0a 5b 5d c3 e8 10 a9
RSP: 0018:ffffc90000fd8c08 EFLAGS: 00000206
RAX: 0000000000000016 RBX: 0000000000000200 RCX: 1ffffffff1fa5faa
RDX: 0000000000000000 RSI: 0000000000000103 RDI: 0000000000000001
RBP: ffff8880b9d40280 R08: 0000000000000001 R09: ffffffff8fcdb9c7
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000100013c48
R13: ffff8880b9d40280 R14: 0000000000000000 R15: 00000000ffffffff
 __mod_timer+0x837/0xe30 kernel/time/timer.c:1065
 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421
 expire_timers kernel/time/timer.c:1466 [inline]
 __run_timers.part.0+0x675/0xa20 kernel/time/timer.c:1734
 __run_timers kernel/time/timer.c:1715 [inline]
 run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747
 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x16e/0x1c0 kernel/softirq.c:636
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:191
Code: 74 24 10 e8 1a f7 2c f8 48 89 ef e8 c2 6c 2d f8 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 <e8> e3 4a 21 f8 65 8b 05 bc 91 d4 76 85 c0 74 0a 5b 5d c3 e8 10 a9
RSP: 0018:ffffc9001ec17a40 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff1ad83a1
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001
RBP: ffff88814d6da950 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817b0798 R11: 0000000000000001 R12: 0000000000000206
R13: ffff88814d6da950 R14: ffff88814d6da088 R15: ffff8880b9d51c00
 try_to_wake_up+0x643/0x1550 kernel/sched/core.c:3840
 wake_up_process kernel/sched/core.c:3907 [inline]
 wake_up_q+0x7e/0xf0 kernel/sched/core.c:935
 futex_wake+0x3e9/0x490 kernel/futex.c:1633
 do_futex+0x2a0/0x1770 kernel/futex.c:3735
 __do_sys_futex+0xdc/0x3b0 kernel/futex.c:3807
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665e9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fdd55f95218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 000000000056bf88 RCX: 00000000004665e9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 000000000056bf8c
RBP: 000000000056bf80 R08: 000000000000000e R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 000000000056bf8c
R13: 00007ffca3027fbf R14: 00007fdd55f95300 R15: 0000000000022000
----------------
Code disassembly (best guess):
   0:	74 24                	je     0x26
   2:	10 e8                	adc    %ch,%al
   4:	1a f7                	sbb    %bh,%dh
   6:	2c f8                	sub    $0xf8,%al
   8:	48 89 ef             	mov    %rbp,%rdi
   b:	e8 c2 6c 2d f8       	callq  0xf82d6cd2
  10:	81 e3 00 02 00 00    	and    $0x200,%ebx
  16:	75 25                	jne    0x3d
  18:	9c                   	pushfq 
  19:	58                   	pop    %rax
  1a:	f6 c4 02             	test   $0x2,%ah
  1d:	75 2d                	jne    0x4c
  1f:	48 85 db             	test   %rbx,%rbx
  22:	74 01                	je     0x25
  24:	fb                   	sti    
  25:	bf 01 00 00 00       	mov    $0x1,%edi
  2a:	e8 e3 4a 21 f8       	callq  0xf8214b12 <-- trapping instruction
  2f:	65 8b 05 bc 91 d4 76 	mov    %gs:0x76d491bc(%rip),%eax        # 0x76d491f2
  36:	85 c0                	test   %eax,%eax
  38:	74 0a                	je     0x44
  3a:	5b                   	pop    %rbx
  3b:	5d                   	pop    %rbp
  3c:	c3                   	retq   
  3d:	e8                   	.byte 0xe8
  3e:	10                   	.byte 0x10
  3f:	a9                   	.byte 0xa9