watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [kworker/u4:1:11]
Modules linked in:
irq event stamp: 4753583
hardirqs last  enabled at (4753582): [<ffff800012100cc0>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline]
hardirqs last  enabled at (4753582): [<ffff800012100cc0>] exit_to_kernel_mode+0xe8/0x118 arch/arm64/kernel/entry-common.c:94
hardirqs last disabled at (4753583): [<ffff8000120fe99c>] __el1_irq arch/arm64/kernel/entry-common.c:468 [inline]
hardirqs last disabled at (4753583): [<ffff8000120fe99c>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:486
softirqs last  enabled at (4748270): [<ffff800008020d74>] softirq_handle_end kernel/softirq.c:414 [inline]
softirqs last  enabled at (4748270): [<ffff800008020d74>] __do_softirq+0xc14/0xea0 kernel/softirq.c:600
softirqs last disabled at (4748277): [<ffff80000802a994>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79
CPU: 1 PID: 11 Comm: kworker/u4:1 Not tainted 6.1.33-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
Workqueue: netns cleanup_net
pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __list_add include/linux/list.h:73 [inline]
pc : list_add_tail include/linux/list.h:102 [inline]
pc : list_move_tail include/linux/list.h:230 [inline]
pc : fq_pie_qdisc_dequeue+0x3f4/0x8ac net/sched/sch_fq_pie.c:248
lr : __list_add include/linux/list.h:72 [inline]
lr : list_add_tail include/linux/list.h:102 [inline]
lr : list_move_tail include/linux/list.h:230 [inline]
lr : fq_pie_qdisc_dequeue+0x3d4/0x8ac net/sched/sch_fq_pie.c:248
sp : ffff8000080171e0
x29: ffff800008017250 x28: ffff00012bde2040 x27: ffff0000d89ff2e8
x26: ffff0000d89ff2f0 x25: dfff800000000000 x24: ffff0000d89ff2e0
x23: ffff00012bde2030 x22: 0000000000000040 x21: ffff0000d89ff2e0
x20: ffff0000d89ff2e8 x19: ffff0000d89ff2e0 x18: ffff000122824008
x17: 0000000000000000 x16: ffff8000084fa384 x15: 0000000000000100
x14: 0000000000000000 x13: 0000000000000001 x12: ffff0000c099b780
x11: ff8080001071432c x10: 0000000000000000 x9 : ffff80001071432c
x8 : 0000000000000000 x7 : ffff80000840686c x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : ffff0000d89ff2e0 x1 : ffff0000d89ff2e0 x0 : 0000000000000001
Call trace:
 __list_add include/linux/list.h:73 [inline]
 list_add_tail include/linux/list.h:102 [inline]
 list_move_tail include/linux/list.h:230 [inline]
 fq_pie_qdisc_dequeue+0x3f4/0x8ac net/sched/sch_fq_pie.c:248
 dequeue_skb net/sched/sch_generic.c:292 [inline]
 qdisc_restart net/sched/sch_generic.c:397 [inline]
 __qdisc_run+0x204/0x239c net/sched/sch_generic.c:415
 __dev_xmit_skb net/core/dev.c:3885 [inline]
 __dev_queue_xmit+0xe14/0x38d8 net/core/dev.c:4227
 dev_queue_xmit include/linux/netdevice.h:3018 [inline]
 neigh_connected_output+0x2f8/0x38c net/core/neighbour.c:1612
 neigh_output include/net/neighbour.h:546 [inline]
 ip6_finish_output2+0xdb4/0x1a98 net/ipv6/ip6_output.c:134
 __ip6_finish_output net/ipv6/ip6_output.c:195 [inline]
 ip6_finish_output+0x538/0x8c8 net/ipv6/ip6_output.c:206
 NF_HOOK_COND include/linux/netfilter.h:291 [inline]
 ip6_output+0x270/0x594 net/ipv6/ip6_output.c:227
 dst_output include/net/dst.h:444 [inline]
 NF_HOOK include/linux/netfilter.h:302 [inline]
 ndisc_send_skb+0xc30/0x1790 net/ipv6/ndisc.c:508
 ndisc_send_rs+0x47c/0x5d4 net/ipv6/ndisc.c:718
 addrconf_rs_timer+0x300/0x58c net/ipv6/addrconf.c:3936
 call_timer_fn+0x1c0/0xa1c kernel/time/timer.c:1474
 expire_timers kernel/time/timer.c:1519 [inline]
 __run_timers+0x554/0x718 kernel/time/timer.c:1790
 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:1803
 __do_softirq+0x30c/0xea0 kernel/softirq.c:571
 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79
 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:889
 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:84
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0x28c/0x534 kernel/softirq.c:650
 irq_exit_rcu+0x14/0x84 kernel/softirq.c:662
 __el1_irq arch/arm64/kernel/entry-common.c:472 [inline]
 el1_interrupt+0x38/0x68 arch/arm64/kernel/entry-common.c:486
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:491
 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:577
 rcu_read_unlock include/linux/rcupdate.h:776 [inline]
 inet_twsk_purge+0x740/0x864 net/ipv4/inet_timewait_sock.c:339
 dccp_v6_exit_batch+0x20/0x2c net/dccp/ipv6.c:1123
 ops_exit_list net/core/net_namespace.c:174 [inline]
 cleanup_net+0x5dc/0x994 net/core/net_namespace.c:601
 process_one_work+0x7ac/0x1404 kernel/workqueue.c:2289
 worker_thread+0x8e4/0xfec kernel/workqueue.c:2436
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860