rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=f02/1/0x4000000000000000 softirq=8573/8574 fqs=5250 
	(t=10502 jiffies g=9637 q=175720)
NMI backtrace for cpu 0
CPU: 0 PID: 9443 Comm: syz-executor927 Not tainted 5.9.0-rc1-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:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1b3/0x223 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x194/0x1cf kernel/rcu/tree_stall.h:318
 print_cpu_stall kernel/rcu/tree_stall.h:551 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:625 [inline]
 rcu_pending kernel/rcu/tree.c:3637 [inline]
 rcu_sched_clock_irq.cold+0x5b3/0xccd kernel/rcu/tree.c:2519
 update_process_times+0x25/0xa0 kernel/time/timer.c:1710
 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:1524 [inline]
 __hrtimer_run_queues+0x1d5/0xfc0 kernel/time/hrtimer.c:1588
 hrtimer_interrupt+0x32a/0x930 kernel/time/hrtimer.c:1650
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
 __sysvec_apic_timer_interrupt+0x142/0x5e0 arch/x86/kernel/apic/apic.c:1097
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:50 [inline]
 sysvec_apic_timer_interrupt+0x4c/0xf0 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline]
RIP: 0010:call_timer_fn+0xaa/0x760 kernel/time/timer.c:1391
Code: 31 c0 e8 89 22 10 00 48 8d 7b 28 48 89 f8 48 c1 e8 03 42 0f b6 14 20 48 8d 43 4f 48 89 c1 83 e0 07 48 c1 e9 03 42 0f b6 0c 21 <65> 8b 2d cf e1 9d 7e 81 e5 ff ff ff 7f 38 c1 40 0f 9e c6 84 c9 0f
RSP: 0018:ffffc90000007d20 EFLAGS: 00000a07
RAX: 0000000000000007 RBX: ffff88809c3f89c0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81641c87 RDI: ffff88809c3f89e8
RBP: ffff88809c3f89c0 R08: 0000000000000001 R09: ffffffff8c5f3aa7
R10: fffffbfff18be754 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000000 R14: 1ffff92000000fa7 R15: ffff8880ae6255c0
 expire_timers kernel/time/timer.c:1458 [inline]
 __run_timers.part.0+0x67c/0xaa0 kernel/time/timer.c:1755
 __run_timers kernel/time/timer.c:1736 [inline]
 run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1768
 __do_softirq+0x2de/0xa24 kernel/softirq.c:298
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x9d/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+0x1f3/0x230 kernel/softirq.c:435
 sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x4b/0x80 kernel/locking/spinlock.c:199
Code: c0 d8 3b b6 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 31 48 83 3d 46 f6 bf 01 00 74 25 fb 66 0f 1f 44 00 00 <bf> 01 00 00 00 e8 db 6d 59 f9 65 8b 05 d4 b8 0b 78 85 c0 74 02 5d
RSP: 0018:ffffc9000749f910 EFLAGS: 00000286
RAX: 1ffffffff136c77b RBX: ffff88809e95c0c0 RCX: 0000000000000006
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffffffff87f6456f
RBP: ffff8880ae635e00 R08: 0000000000000001 R09: ffffffff8c5f3aa7
R10: fffffbfff18be754 R11: 0000000000000001 R12: ffff8880ae635e00
R13: ffff88809f1f2280 R14: ffff888090ede840 R15: 0000000000000402
 finish_lock_switch kernel/sched/core.c:3517 [inline]
 finish_task_switch+0x147/0x750 kernel/sched/core.c:3617
 context_switch kernel/sched/core.c:3781 [inline]
 __schedule+0x8ed/0x21e0 kernel/sched/core.c:4527
 preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:4785
 irqentry_exit_cond_resched kernel/entry/common.c:333 [inline]
 irqentry_exit_cond_resched kernel/entry/common.c:325 [inline]
 irqentry_exit+0x65/0x90 kernel/entry/common.c:363
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:preempt_schedule_thunk+0x0/0x18 arch/x86/entry/thunk_64.S:40
Code: ff d3 48 c7 44 24 50 00 00 00 00 eb e3 66 0f 1f 44 00 00 31 ed 65 48 8b 04 25 0c a0 00 00 48 8d a0 58 ff ff ff e8 49 05 46 00 <55> 48 89 e5 57 56 52 51 50 41 50 41 51 41 52 41 53 e8 23 e6 f4 06
RSP: 0018:ffffc9000749fb38 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 1ffff92000e93f6c RCX: ffffffff81693530
RDX: ffff88809e95c0c0 RSI: ffffffff816937c2 RDI: 0000000000000005
RBP: ffffc9000749fc18 R08: 0000000000000001 R09: ffffffff8c5f3aa7
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 1ffff92000e93f9e
 smp_call_function_single+0x467/0x4f0 kernel/smp.c:384
 task_function_call+0xd7/0x160 kernel/events/core.c:116
 perf_install_in_context+0x2cb/0x550 kernel/events/core.c:2895
 __do_sys_perf_event_open+0x1c31/0x2cb0 kernel/events/core.c:11992
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x447569
Code: e8 3c e6 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 0f 83 2b 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffec742a098 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000447569
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00000000000001af
R13: 00000000004080b0 R14: 0000000000000000 R15: 0000000000000000