rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (1 GPs behind) idle=c9e/1/0x4000000000000004 softirq=183620/183621 fqs=20 
	(t=10500 jiffies g=289189 q=124)
rcu: rcu_preempt kthread starved for 10456 jiffies! g289189 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: RCU grace-period kthread stack dump:
rcu_preempt     I29040    10      2 0x80004000
Call Trace:
 context_switch kernel/sched/core.c:3384 [inline]
 __schedule+0x94f/0x1e70 kernel/sched/core.c:4069
 schedule+0xd9/0x260 kernel/sched/core.c:4136
 schedule_timeout+0x486/0xc50 kernel/time/timer.c:1895
 rcu_gp_fqs_loop kernel/rcu/tree.c:1639 [inline]
 rcu_gp_kthread+0x9b2/0x18d0 kernel/rcu/tree.c:1799
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
NMI backtrace for cpu 1
CPU: 1 PID: 20765 Comm: syz-executor.5 Not tainted 5.4.0-rc3+ #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+0x172/0x1f0 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold+0x70/0xb2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x23b/0x28b lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x183/0x1cf kernel/rcu/tree_stall.h:254
 print_cpu_stall kernel/rcu/tree_stall.h:455 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:529 [inline]
 rcu_pending kernel/rcu/tree.c:2795 [inline]
 rcu_sched_clock_irq.cold+0x4fd/0xc12 kernel/rcu/tree.c:2244
 update_process_times+0x2d/0x70 kernel/time/timer.c:1726
 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:167
 tick_sched_timer+0x53/0x140 kernel/time/tick-sched.c:1299
 __run_hrtimer kernel/time/hrtimer.c:1514 [inline]
 __hrtimer_run_queues+0x364/0xe40 kernel/time/hrtimer.c:1576
 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1638
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline]
 smp_apic_timer_interrupt+0x160/0x610 arch/x86/kernel/apic/apic.c:1135
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x54/0x90 kernel/locking/spinlock.c:199
Code: c0 70 1e f3 88 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 33 48 83 3d 95 3f a5 01 00 74 20 fb 66 0f 1f 44 00 00 <bf> 01 00 00 00 e8 12 34 01 fa 65 8b 05 13 1f b4 78 85 c0 74 06 41
RSP: 0018:ffff8880ae909dd0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff11e63ce RBX: ffffffff85d538b0 RCX: 0000000000000002
RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffff88805ce54cd4
RBP: ffff8880ae909dd8 R08: 1ffffffff14efd37 R09: fffffbfff14efd38
R10: fffffbfff14efd37 R11: ffffffff8a77e9bf R12: ffff8880ae924c00
R13: ffff888025b90b48 R14: ffff8880ae924c00 R15: dffffc0000000000
 expire_timers kernel/time/timer.c:1448 [inline]
 __run_timers kernel/time/timer.c:1773 [inline]
 __run_timers kernel/time/timer.c:1740 [inline]
 run_timer_softirq+0x6b1/0x1790 kernel/time/timer.c:1786
 __do_softirq+0x262/0x98c kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x19b/0x1e0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1137
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:756 [inline]
RIP: 0010:slab_alloc mm/slab.c:3312 [inline]
RIP: 0010:kmem_cache_alloc_trace+0x2ac/0x790 mm/slab.c:3548
Code: 7e 0f 85 df fe ff ff e8 62 54 52 ff e9 d5 fe ff ff e8 b8 7b ca ff 48 83 3d 30 0b 45 07 00 0f 84 d5 03 00 00 48 8b 7d c8 57 9d <0f> 1f 44 00 00 e9 5f fe ff ff 31 d2 be 35 02 00 00 48 c7 c7 76 20
RSP: 0018:ffff888013e7fbe0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000007 RBX: 0000000000000dc0 RCX: 0000000000000006
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000286
RBP: ffff888013e7fc50 R08: 1ffffffff14efd37 R09: fffffbfff14efd38
R10: fffffbfff14efd37 R11: ffffffff8a77e9bf R12: ffff8880aa400e00
R13: ffff8880aa400e00 R14: 0000000000000dc0 R15: ffff888017c12000
 kmalloc include/linux/slab.h:556 [inline]
 kzalloc include/linux/slab.h:690 [inline]
 perf_event_alloc.part.0+0xc0/0x33d0 kernel/events/core.c:10414
 perf_event_alloc kernel/events/core.c:10883 [inline]
 __do_sys_perf_event_open+0x9fb/0x2b40 kernel/events/core.c:10985
 __se_sys_perf_event_open kernel/events/core.c:10867 [inline]
 __x64_sys_perf_event_open+0xbe/0x150 kernel/events/core.c:10867
 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459a59
Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fe630309c78 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459a59
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000440
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 00007fe63030a6d4
R13: 00000000004c6b0c R14: 00000000004dc1d0 R15: 00000000ffffffff