rcu: INFO: rcu_sched self-detected stall on CPU
rcu: 	0-...!: (1 GPs behind) idle=a96/1/0x4000000000000002 softirq=46149/46150 fqs=1 
	(t=10001 jiffies g=19837 q=3957)
NMI backtrace for cpu 0
CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.5.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
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+0x70/0x150 arch/x86/kernel/apic/apic.c:1135
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x4/0x20 kernel/kcov.c:274
Code: 84 00 00 00 00 00 48 8b 0c 24 0f b7 d6 0f b7 f7 bf 03 00 00 00 e9 6c fe ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 90 48 8b 0c 24 <89> f2 89 fe bf 05 00 00 00 e9 4e fe ff ff 66 66 2e 0f 1f 84 00 00
RSP: 0018:ffffc9000004fcb8 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13
RAX: ffff888236d74680 RBX: 0000000044b82fa0 RCX: ffffffff82780c2d
RDX: 0000000000000100 RSI: 00000000000186a0 RDI: 00000000000f4240
RBP: 00000000000186a0 R08: ffff888236d74680 R09: ffff888236d74ee0
R10: 0000000000000001 R11: ffff888236d74680 R12: 0000000000000003
R13: 0000000000000000 R14: 00000002af31dc46 R15: 0000a7c5ac471b47
 pie_calculate_probability+0x19d/0x470 net/sched/sch_pie.c:357
 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
 run_ksoftirqd kernel/softirq.c:603 [inline]
 run_ksoftirqd+0x15/0x20 kernel/softirq.c:595
 smpboot_thread_fn+0x165/0x240 kernel/smpboot.c:165
 kthread+0x13c/0x160 kernel/kthread.c:255
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352