rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=9dec/1/0x4000000000000000 softirq=125405/125406 fqs=5249
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:     8839          0            0
rcu: 	cputime:      205      52284            6   ==> 52510(ms)
rcu: 	(t=10503 jiffies g=131593 q=5627 ncpus=2)
CPU: 1 UID: 0 PID: 28150 Comm: syz.0.8710 Not tainted 6.16.0-rc3-syzkaller-00057-g92ca6c498a5e #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:taprio_dequeue_tc_priority+0x26f/0x750 net/sched/sch_taprio.c:792
Code: 00 00 41 8b 5d 00 4c 89 f0 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 39 02 00 00 45 8b 36 89 df 44 89 f6 e8 04 1d 3a f8 44 39 f3 <73> 15 48 8b 5c 24 10 48 85 db 0f 85 7a 04 00 00 e8 2c 1b 3a f8 eb
RSP: 0018:ffffc90000a08b48 EFLAGS: 00000287
RAX: ffffffff898631dc RBX: 0000000000000009 RCX: 0000000000000100
RDX: ffff888057250000 RSI: 0000000000000010 RDI: 0000000000000009
RBP: 1ffff1100a616672 R08: 0000000000000000 R09: ffffffff89858806
R10: 0000000000000001 R11: ffffffff8978f4a0 R12: dffffc0000000000
R13: ffff8880530b3394 R14: 0000000000000010 R15: 0000000000000002
FS:  00007f2359ce36c0(0000) GS:ffff888125d51000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f234f5ff000 CR3: 00000000819ae000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 taprio_dequeue+0x186/0x550 net/sched/sch_taprio.c:-1
 dequeue_skb net/sched/sch_generic.c:294 [inline]
 qdisc_restart net/sched/sch_generic.c:399 [inline]
 __qdisc_run+0x23c/0x15f0 net/sched/sch_generic.c:417
 qdisc_run+0xc2/0x230 include/net/pkt_sched.h:127
 net_tx_action+0x7c9/0x980 net/core/dev.c:5624
 handle_softirqs+0x286/0x870 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0x110 kernel/locking/spinlock.c:194
Code: 74 05 e8 fb a3 5e f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> d3 8e 27 f6 65 8b 05 bc ba 33 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc900050f7600 EFLAGS: 00000206
RAX: 75234d3c46333700 RBX: 0000000000000216 RCX: 75234d3c46333700
RDX: 0000000000000006 RSI: ffffffff8d98234b RDI: 0000000000000001
RBP: ffffc900050f7690 R08: ffffffff8fa10bf7 R09: 1ffffffff1f4217e
R10: dffffc0000000000 R11: fffffbfff1f4217f R12: dffffc0000000000
R13: ffff88801b6e88d8 R14: ffff88801b6e88d8 R15: 1ffff92000a1eec0
 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
 unlock_page_lruvec_irqrestore include/linux/memcontrol.h:1506 [inline]
 folio_batch_move_lru+0x2fc/0x3a0 mm/swap.c:174
 __folio_batch_add_and_move+0x5ad/0xd20 mm/swap.c:196
 shmem_alloc_and_add_folio+0xcb3/0xf60 mm/shmem.c:1949
 shmem_get_folio_gfp+0x59d/0x1660 mm/shmem.c:2536
 shmem_get_folio mm/shmem.c:2642 [inline]
 shmem_write_begin+0xf7/0x2b0 mm/shmem.c:3292
 generic_perform_write+0x2c7/0x910 mm/filemap.c:4112
 shmem_file_write_iter+0xf8/0x120 mm/shmem.c:3467
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x54b/0xa90 fs/read_write.c:686
 ksys_write+0x145/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2358d8d3df
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 92 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 4c 93 02 00 48
RSP: 002b:00007f2359ce2df0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007f2358d8d3df
RDX: 0000000001000000 RSI: 00007f234e600000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000004444
R10: 0000000000000002 R11: 0000000000000293 R12: 0000000000000003
R13: 00007f2359ce2ef0 R14: 00007f2359ce2eb0 R15: 00007f234e600000
 </TASK>
sched: DL replenish lagged too much