rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 1, t=10502 jiffies, g=173021, q=233)
rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4295061542-4295051039), jiffies_till_next_fqs=1, root ->qsmask 0x0
syz-executor.5  R  running task    27896 19673   8867 0x00000008
Call Trace:
 <IRQ>
 sched_show_task kernel/sched/core.c:5935 [inline]
 sched_show_task.cold+0x2ed/0x34e kernel/sched/core.c:5910
 print_other_cpu_stall kernel/rcu/tree_stall.h:410 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:538 [inline]
 rcu_pending kernel/rcu/tree.c:2795 [inline]
 rcu_sched_clock_irq.cold+0xafc/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:calculate_probability net/sched/sch_pie.c:368 [inline]
RIP: 0010:pie_timer+0x2a7/0x830 net/sched/sch_pie.c:450
Code: ea 03 80 3c 02 00 0f 85 23 05 00 00 48 8b 83 c0 02 00 00 4c 89 f9 4c 89 f6 48 bf 98 99 99 99 99 99 99 19 48 29 c1 48 89 45 98 <4c> 89 f8 48 2b 45 c8 48 89 4d a8 48 89 45 a0 e8 65 bf a5 fb 48 b8
RSP: 0000:ffff8880ae909c78 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: 0000000000039387 RBX: ffff888094672800 RCX: fffffffffffc6c79
RDX: 1ffff110128ce558 RSI: 0000000000000000 RDI: 1999999999999998
RBP: ffff8880ae909d00 R08: ffff8880428f2500 R09: ffffed1015d2137d
R10: ffffed1015d2137c R11: 0000000000000003 R12: 000015798ee23084
R13: 00000225c17d04da R14: 0000000000000000 R15: 0000000000000000
 call_timer_fn+0x1ac/0x780 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+0x6c3/0x1790 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: 0033:0x45c89a
Code: 25 18 00 00 00 00 74 01 f0 48 0f b1 3d cf 9e 61 00 48 39 c2 75 da f3 c3 0f 1f 84 00 00 00 00 00 48 63 ff b8 e4 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 06 f3 c3 0f 1f 40 00 48 c7 c2 d4 ff ff ff f7
RSP: 002b:00007fc5677b2c58 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: 000000000075bf28 RCX: 000000000045c89a
RDX: 0000000000000000 RSI: 00007fc5677b2c60 RDI: 0000000000000001
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075bf2c
R13: 00000000004c65c1 R14: 00000000004db8c8 R15: 000000000075bf2c
rcu: rcu_preempt kthread starved for 10539 jiffies! g173021 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: RCU grace-period kthread stack dump:
rcu_preempt     R  running task    29040    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