rcu: INFO: rcu_sched self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=f6a/0/0x3 softirq=8670/8671 fqs=1997 
	(t=10000 jiffies g=3705 q=4151)
NMI backtrace for cpu 1
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.5.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x90/0xbe lib/dump_stack.c:118
 nmi_cpu_backtrace.cold.7+0x18/0x64 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x140/0x145 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x8c/0xb8 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:2827 [inline]
 rcu_sched_clock_irq.cold.89+0x1be/0x3b9 kernel/rcu/tree.c:2271
 update_process_times+0x24/0x70 kernel/time/timer.c:1726
 tick_sched_handle+0x4b/0xa0 kernel/time/tick-sched.c:171
 tick_sched_timer+0x3c/0xa0 kernel/time/tick-sched.c:1314
 __run_hrtimer kernel/time/hrtimer.c:1517 [inline]
 __hrtimer_run_queues+0x1b0/0x4a0 kernel/time/hrtimer.c:1579
 hrtimer_interrupt+0x11b/0x290 kernel/time/hrtimer.c:1641
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline]
 smp_apic_timer_interrupt+0x68/0x150 arch/x86/kernel/apic/apic.c:1135
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:153 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x9/0x50 kernel/kcov.c:187
Code: 00 65 48 8b 04 25 c0 7e 01 00 48 8b 80 d0 12 00 00 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 65 48 8b 04 25 c0 7e 01 00 <65> 8b 15 f8 d6 de 7e 81 e2 00 01 1f 00 48 8b 34 24 75 2b 8b 90 b8
RSP: 0018:ffffc900000a4dc0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffff888236d6af00 RBX: 0000000000000000 RCX: ffffffff820889a1
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000007
RBP: 0000000000000000 R08: ffff888236d6af00 R09: ffff888236d6b760
R10: 0000000000000001 R11: ffff888236d6af00 R12: 0000000000000000
R13: 0000000000000000 R14: ffffc90002251a28 R15: ffff888225cd4300
 pie_calculate_probability+0x3ef/0x470 net/sched/sch_pie.c:422
 fq_pie_timer+0x6a/0xd0 net/sched/sch_fq_pie.c:377
 call_timer_fn+0xc4/0x2a0 kernel/time/timer.c:1404
 expire_timers kernel/time/timer.c:1449 [inline]
 __run_timers kernel/time/timer.c:1773 [inline]
 __run_timers kernel/time/timer.c:1740 [inline]
 run_timer_softirq+0x3b0/0x800 kernel/time/timer.c:1786
 __do_softirq+0xdb/0x2c8 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x98/0xa0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x8c/0x150 arch/x86/kernel/apic/apic.c:1137
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:default_idle+0x20/0x110 arch/x86/kernel/process.c:700
Code: f6 e9 e4 f0 33 ff cc cc cc cc 41 55 41 54 55 65 8b 2d ec 6b a2 7d 53 0f 1f 44 00 00 e9 07 00 00 00 0f 00 2d e4 dd 42 00 fb f4 <65> 8b 2d d1 6b a2 7d 0f 1f 44 00 00 5b 5d 41 5c 41 5d c3 65 8b 05
RSP: 0018:ffffc9000006feb8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000080084000 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 000000000000af66 RSI: ffffffff811632d2 RDI: 0000000000000007
RBP: 0000000000000001 R08: ffff888236d6af00 R09: 0000000000000000
R10: 0000000000000001 R11: ffff888236d6af00 R12: ffffffffffffffff
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 cpuidle_idle_call kernel/sched/idle.c:154 [inline]
 do_idle+0x1ac/0x220 kernel/sched/idle.c:269
 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:361
 start_secondary+0x140/0x190 arch/x86/kernel/smpboot.c:264
 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:242