watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [kworker/u4:4:467]
Modules linked in:
irq event stamp: 2572885
hardirqs last  enabled at (2572884): [<ffff80008a439ebc>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline]
hardirqs last  enabled at (2572884): [<ffff80008a439ebc>] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:94
hardirqs last disabled at (2572885): [<ffff80008a437af4>] __el1_irq arch/arm64/kernel/entry-common.c:470 [inline]
hardirqs last disabled at (2572885): [<ffff80008a437af4>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:488
softirqs last  enabled at (2568444): [<ffff80008a1a3b6c>] spin_unlock_bh include/linux/spinlock.h:395 [inline]
softirqs last  enabled at (2568444): [<ffff80008a1a3b6c>] batadv_nc_purge_paths+0x2f4/0x378 net/batman-adv/network-coding.c:471
softirqs last disabled at (2568447): [<ffff80008002b660>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80
CPU: 0 PID: 467 Comm: kworker/u4:4 Not tainted 6.4.0-rc5-syzkaller-g177239177378 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
Workqueue: bat_events batadv_nc_worker
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __list_del_entry include/linux/list.h:137 [inline]
pc : list_move_tail include/linux/list.h:229 [inline]
pc : fq_pie_qdisc_dequeue+0x2bc/0x8ac net/sched/sch_fq_pie.c:248
lr : __list_del_entry include/linux/list.h:137 [inline]
lr : list_move_tail include/linux/list.h:229 [inline]
lr : fq_pie_qdisc_dequeue+0x290/0x8ac net/sched/sch_fq_pie.c:248
sp : ffff800080007210
x29: ffff800080007280 x28: ffff0001307b9810 x27: ffff0000c81172e8
x26: ffff0000c81172f0 x25: dfff800000000000 x24: ffff0000c81172e0
x23: ffff0001307b9800 x22: 0000000000000040 x21: 1fffe000260f7300
x20: 0000000000000000 x19: ffff0000c81172e0 x18: 1fffe000368447c6
x17: 0000000000000000 x16: ffff80008050c16c x15: 0000000000000301
x14: 0000000000000100 x13: 0000000000000000 x12: 0000000000000001
x11: 0000000000000301 x10: 0000000000000100 x9 : 0000000000000000
x8 : 0000000000000000 x7 : ffff80008041c668 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000
x2 : ffff0001307b9810 x1 : 0000000000000000 x0 : ffff0001307b9818
Call trace:
 __list_del_entry include/linux/list.h:137 [inline]
 list_move_tail include/linux/list.h:229 [inline]
 fq_pie_qdisc_dequeue+0x2bc/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+0x1fc/0x231c net/sched/sch_generic.c:415
 __dev_xmit_skb net/core/dev.c:3868 [inline]
 __dev_queue_xmit+0xc80/0x3318 net/core/dev.c:4210
 dev_queue_xmit include/linux/netdevice.h:3085 [inline]
 neigh_connected_output+0x2f8/0x38c net/core/neighbour.c:1581
 neigh_output include/net/neighbour.h:544 [inline]
 ip6_finish_output2+0xd60/0x1a1c 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:292 [inline]
 ip6_output+0x270/0x594 net/ipv6/ip6_output.c:227
 dst_output include/net/dst.h:458 [inline]
 NF_HOOK include/linux/netfilter.h:303 [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+0x19c/0x8cc kernel/time/timer.c:1700
 expire_timers kernel/time/timer.c:1751 [inline]
 __run_timers+0x55c/0x734 kernel/time/timer.c:2022
 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:2035
 __do_softirq+0x2d0/0xd54 kernel/softirq.c:571
 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80
 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:882
 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:85
 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:474 [inline]
 el1_interrupt+0x38/0x68 arch/arm64/kernel/entry-common.c:488
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:493
 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:587
 __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:182 [inline]
 arch_local_irq_restore arch/arm64/include/asm/irqflags.h:202 [inline]
 lock_release+0x4f4/0x9ac kernel/locking/lockdep.c:5728
 rcu_lock_release+0x2c/0x38 include/linux/rcupdate.h:332
 rcu_read_unlock include/linux/rcupdate.h:806 [inline]
 batadv_nc_process_nc_paths+0x290/0x324 net/batman-adv/network-coding.c:699
 batadv_nc_worker+0x3c4/0x580 net/batman-adv/network-coding.c:728
 process_one_work+0x788/0x12d4 kernel/workqueue.c:2405
 worker_thread+0x8e0/0xfe8 kernel/workqueue.c:2552
 kthread+0x288/0x310 kernel/kthread.c:379
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:853