rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=542c/1/0x4000000000000000 softirq=33305/33306 fqs=5072
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:     6657          0            0
rcu: 	cputime:      210      52279           22   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=30293 q=2149 ncpus=2)
CPU: 1 UID: 0 PID: 24 Comm: kworker/1:0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: mm_percpu_wq vmstat_update
RIP: 0010:netdev_get_num_tc include/linux/netdevice.h:2627 [inline]
RIP: 0010:taprio_dequeue_from_txq+0xc8/0x980 net/sched/sch_taprio.c:713
Code: f8 48 c1 e8 03 49 bc 00 00 00 00 00 fc ff df 42 80 3c 20 00 74 08 4c 89 ff e8 64 9f b6 f8 4c 89 74 24 08 49 8b 2f 4d 8d 7d 36 <4c> 89 f8 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 ce 06 00 00 48 85
RSP: 0018:ffffc90000a08c70 EFLAGS: 00000246
RAX: 1ffff11007a3918b RBX: ffff88803427e000 RCX: dffffc0000000000
RDX: 0000000000000100 RSI: 000000000000000b RDI: ffff88803427e000
RBP: ffff888054d5e800 R08: ffffffff896fcc56 R09: ffffffff8df41aa0
R10: 0000000000000001 R11: ffffffff89631050 R12: dffffc0000000000
R13: ffff888033454000 R14: ffff888058d4e000 R15: ffff888033454036
FS:  0000000000000000(0000) GS:ffff888125f1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30d23ffc CR3: 000000000dd3a000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 taprio_dequeue_tc_priority+0x1ac/0x750 net/sched/sch_taprio.c:793
 taprio_dequeue+0x186/0x550 net/sched/sch_taprio.c:-1
 dequeue_skb net/sched/sch_generic.c:297 [inline]
 qdisc_restart net/sched/sch_generic.c:402 [inline]
 __qdisc_run+0x23f/0x1510 net/sched/sch_generic.c:420
 qdisc_run+0xc7/0x300 include/net/pkt_sched.h:120
 net_tx_action+0x717/0x900 net/core/dev.c:5782
 handle_softirqs+0x22b/0x7c0 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x60/0x150 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:194
Code: f7 e8 cd 3a 42 f6 f7 c3 00 02 00 00 74 05 e8 20 67 6c f6 9c 58 a9 00 02 00 00 75 27 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 04 55 34 f6 65 8b 05 0d b8 23 07 85 c0 74 18 5b 41 5e c3 cc cc
RSP: 0018:ffffc900001e7880 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000212 RCX: 0000000080000002
RDX: 0000000000000006 RSI: ffffffff8d792329 RDI: 0000000000000001
RBP: 000000000000003f R08: ffffffff8f822377 R09: 1ffffffff1f0446e
R10: dffffc0000000000 R11: fffffbfff1f0446f R12: 000000000000052b
R13: 000000000000003f R14: ffff88813fffc180 R15: 1ffff110170e8170
 decay_pcp_high+0x118/0x290 mm/page_alloc.c:2579
 refresh_cpu_vm_stats+0x1e9/0x440 mm/vmstat.c:845
 vmstat_update+0x15/0xb0 mm/vmstat.c:2051
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
sched: DL replenish lagged too much