rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 3262 jiffies s: 11269 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 7214 Comm: syz.4.573 Not tainted 6.12.0-rc2-syzkaller-00233-gc186b7a7f238 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__list_add include/linux/list.h:154 [inline]
RIP: 0010:list_add_tail include/linux/list.h:183 [inline]
RIP: 0010:list_move_tail include/linux/list.h:311 [inline]
RIP: 0010:fq_pie_qdisc_dequeue+0x43a/0xa40 net/sched/sch_fq_pie.c:256
Code: 48 89 c3 74 08 4c 89 f7 e8 93 e2 34 f8 4d 89 26 4c 89 e0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 e7 e8 7b e2 34 f8 48 8b 44 24 10 <49> 89 04 24 49 8d 5c 24 08 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00
RSP: 0018:ffffc900000071e8 EFLAGS: 00000246
RAX: ffff88802807b2e0 RBX: dffffc0000000000 RCX: ffff888025185a00
RDX: 0000000000000100 RSI: ffff88802807b2e0 RDI: ffff88805b155d80
RBP: ffff88802807b2e0 R08: ffffffff89c9b3e8 R09: 1ffffffff2858f2a
R10: dffffc0000000000 R11: ffffffff89c9b2c0 R12: ffff88805b155d80
R13: ffff88802807b000 R14: ffff88802807b2e8 R15: ffff88802807b2f0
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc000930418 CR3: 000000000e734000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 try_bulk_dequeue_skb_slow net/sched/sch_generic.c:212 [inline]
 dequeue_skb net/sched/sch_generic.c:299 [inline]
 qdisc_restart net/sched/sch_generic.c:398 [inline]
 __qdisc_run+0x306/0x2170 net/sched/sch_generic.c:416
 __dev_xmit_skb net/core/dev.c:3890 [inline]
 __dev_queue_xmit+0x10c0/0x3ed0 net/core/dev.c:4394
 neigh_output include/net/neighbour.h:542 [inline]
 ip6_finish_output2+0x1001/0x1730 net/ipv6/ip6_output.c:141
 ip6_finish_output+0x41e/0x810 net/ipv6/ip6_output.c:226
 NF_HOOK include/linux/netfilter.h:314 [inline]
 ndisc_send_skb+0xab2/0x1380 net/ipv6/ndisc.c:511
 ndisc_solicit+0x493/0x6a0
 neigh_probe net/core/neighbour.c:1077 [inline]
 neigh_timer_handler+0xa53/0xfe0 net/core/neighbour.c:1159
 call_timer_fn+0x18e/0x650 kernel/time/timer.c:1794
 expire_timers kernel/time/timer.c:1845 [inline]
 __run_timers kernel/time/timer.c:2419 [inline]
 __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2430
 run_timer_base kernel/time/timer.c:2439 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2449
 handle_softirqs+0x2c5/0x980 kernel/softirq.c:554
 __do_softirq kernel/softirq.c:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1037
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:debug_lockdep_rcu_enabled+0x2a/0x40 kernel/rcu/update.c:321
Code: f3 0f 1e fa 31 c0 83 3d 8f 55 57 04 00 74 1e 83 3d e6 86 57 04 00 74 15 65 48 8b 0c 25 c0 d7 03 00 31 c0 83 b9 dc 0a 00 00 00 <0f> 94 c0 c3 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00
RSP: 0018:ffffc9000340ed18 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888025185a00
RDX: 0000000000000000 RSI: ffffffff8c0adc40 RDI: ffffffff8c60fb20
RBP: ffffc9000340ef18 R08: ffffc9000340ee9f R09: 0000000000000000
R10: ffffc9000340ee90 R11: fffff52000681dd4 R12: ffffc9000340ee90
R13: 1ffff92000681dec R14: ffff8880b8600000 R15: ffff888025186c78
 schedule_debug kernel/sched/core.c:5901 [inline]
 __schedule+0x243/0x4b30 kernel/sched/core.c:6557
 __schedule_loop kernel/sched/core.c:6759 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6774
 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2591
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common kernel/sched/completion.c:127 [inline]
 wait_for_completion+0x355/0x620 kernel/sched/completion.c:148
 __flush_work+0xa37/0xc50 kernel/workqueue.c:4217
 flush_work kernel/workqueue.c:4238 [inline]
 flush_delayed_work+0x169/0x1c0 kernel/workqueue.c:4260
 nf_flow_table_gc_cleanup net/netfilter/nf_flow_table_core.c:585 [inline]
 nf_flow_table_cleanup+0x62/0xb0 net/netfilter/nf_flow_table_core.c:595
 flow_offload_netdev_event+0x51/0x70 net/netfilter/nft_flow_offload.c:492
 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93
 call_netdevice_notifiers_extack net/core/dev.c:2034 [inline]
 call_netdevice_notifiers net/core/dev.c:2048 [inline]
 dev_close_many+0x33c/0x4c0 net/core/dev.c:1589
 unregister_netdevice_many_notify+0x530/0x1da0 net/core/dev.c:11377
 unregister_netdevice_many net/core/dev.c:11465 [inline]
 unregister_netdevice_queue+0x303/0x370 net/core/dev.c:11339
 unregister_netdevice include/linux/netdevice.h:3118 [inline]
 __tun_detach+0x6b9/0x1600 drivers/net/tun.c:685
 tun_detach drivers/net/tun.c:701 [inline]
 tun_chr_close+0x105/0x1b0 drivers/net/tun.c:3517
 __fput+0x23f/0x880 fs/file_table.c:431
 task_work_run+0x24f/0x310 kernel/task_work.c:228
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0xa2f/0x28e0 kernel/exit.c:939
 do_group_exit+0x207/0x2c0 kernel/exit.c:1088
 get_signal+0x16a3/0x1740 kernel/signal.c:2917
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe6fb97dff9
Code: Unable to access opcode bytes at 0x7fe6fb97dfcf.
RSP: 002b:00007fe6fc7d3038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007fe6fbb36058 RCX: 00007fe6fb97dff9
RDX: 0000000020000180 RSI: 0000000000008914 RDI: 0000000000000006
RBP: 00007fe6fb9f0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fe6fbb36058 R15: 00007ffc5edc1598
 </TASK>