syzbot

watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [swapper/0:0]
Modules linked in:
irq event stamp: 160481
hardirqs last  enabled at (160480): [<ffff800012104ed0>] __el1_irq arch/arm64/kernel/entry-common.c:476 [inline]
hardirqs last  enabled at (160480): [<ffff800012104ed0>] el1_interrupt+0x58/0x68 arch/arm64/kernel/entry-common.c:486
hardirqs last disabled at (160481): [<ffff800012104e9c>] __el1_irq arch/arm64/kernel/entry-common.c:468 [inline]
hardirqs last disabled at (160481): [<ffff800012104e9c>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:486
softirqs last  enabled at (154906): [<ffff800008020d74>] softirq_handle_end kernel/softirq.c:414 [inline]
softirqs last  enabled at (154906): [<ffff800008020d74>] __do_softirq+0xc14/0xea0 kernel/softirq.c:600
softirqs last disabled at (155021): [<ffff80000802a994>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.1.32-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
pstate: 00400005 (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+0x290/0x8ac 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 : ffff8000080071e0
x29: ffff800008007250 x28: ffff0000c310ead0 x27: ffff0000d9bca2e8
x26: ffff0000d9bca2f0 x25: dfff800000000000 x24: ffff0000d9bca2e0
x23: ffff0000c310eac0 x22: 0000000000000040 x21: 1fffe00018621d58
x20: 0000000000000000 x19: 0000000000000000 x18: ffff800008006ea0
x17: 0000000000000000 x16: ffff8000084fa384 x15: 0000000000000100
x14: 0000000000000000 x13: 0000000000000001 x12: ffff8000155e5040
x11: ff80800010718f60 x10: 0000000000000000 x9 : ffff800010718f60
x8 : ffff8000155e5040 x7 : ffff80000840686c x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : ffff0000c310ead0 x1 : 0000000000000000 x0 : 0000000000000001
Call trace:
 __list_del_entry include/linux/list.h:137 [inline]
 list_move_tail include/linux/list.h:229 [inline]
 fq_pie_qdisc_dequeue+0x290/0x8ac 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
 arch_local_irq_enable+0xc/0x18 arch/arm64/include/asm/irqflags.h:35
 default_idle_call+0x68/0xdc kernel/sched/idle.c:109
 cpuidle_idle_call kernel/sched/idle.c:191 [inline]
 do_idle+0x1e0/0x514 kernel/sched/idle.c:303
 cpu_startup_entry+0x24/0x28 kernel/sched/idle.c:400
 rest_init+0x2d8/0x2f0 init/main.c:729
 start_kernel+0x0/0x60c init/main.c:890
 start_kernel+0x44c/0x60c init/main.c:1145
 __primary_switched+0xb8/0xc0 arch/arm64/kernel/head.S:468