rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (10340 ticks this GP) idle=945/1/0x4000000000000000 softirq=18685/18685 fqs=3113 (t=10501 jiffies g=23397 q=107455) NMI backtrace for cpu 0 CPU: 0 PID: 14 Comm: ksoftirqd/0 Not tainted 5.15.112-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline] rcu_dump_cpu_stacks+0x223/0x390 kernel/rcu/tree_stall.h:343 print_cpu_stall kernel/rcu/tree_stall.h:627 [inline] check_cpu_stall kernel/rcu/tree_stall.h:711 [inline] rcu_pending kernel/rcu/tree.c:3888 [inline] rcu_sched_clock_irq+0xf26/0x1770 kernel/rcu/tree.c:2606 update_process_times+0x196/0x200 kernel/time/timer.c:1788 tick_sched_handle kernel/time/tick-sched.c:226 [inline] tick_sched_timer+0x22d/0x3c0 kernel/time/tick-sched.c:1430 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline] __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:debug_spin_lock_before kernel/locking/spinlock_debug.c:85 [inline] RIP: 0010:do_raw_spin_lock+0x89/0x370 kernel/locking/spinlock_debug.c:114 Code: f1 04 f3 f3 f3 48 89 f1 48 89 74 24 38 48 89 04 16 48 8d 5f 04 48 89 d8 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 f1 01 00 00 8b 03 <3d> ad 4e ad de 0f 85 5d 01 00 00 4d 8d 6c 24 10 4c 89 e8 48 c1 e8 RSP: 0018:ffffc90000d378e0 EFLAGS: 00000246 RAX: 00000000dead4ead RBX: ffff8880755670f4 RCX: 1ffff920001a6f24 RDX: dffffc0000000000 RSI: 1ffff920001a6f24 RDI: ffff8880755670f0 RBP: ffffc90000d379c0 R08: dffffc0000000000 R09: fffffbfff1f79039 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880755670f0 R13: dffffc0000000000 R14: ffff888075567350 R15: 0000000100006e01 spin_lock include/linux/spinlock.h:363 [inline] fq_pie_timer+0x87/0x260 net/sched/sch_fq_pie.c:380 call_timer_fn+0x16d/0x560 kernel/time/timer.c:1421 expire_timers kernel/time/timer.c:1466 [inline] __run_timers+0x67c/0x890 kernel/time/timer.c:1737 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1750 __do_softirq+0x3b3/0x93a kernel/softirq.c:558 run_ksoftirqd+0xc1/0x120 kernel/softirq.c:920 smpboot_thread_fn+0x51b/0x9d0 kernel/smpboot.c:164 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298