watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.0:5755] Modules linked in: irq event stamp: 11317 hardirqs last enabled at (11316): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline] hardirqs last enabled at (11316): [] exit_to_kernel_mode+0xe8/0x118 arch/arm64/kernel/entry-common.c:94 hardirqs last disabled at (11317): [] __el1_irq arch/arm64/kernel/entry-common.c:468 [inline] hardirqs last disabled at (11317): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:486 softirqs last enabled at (4388): [] softirq_handle_end kernel/softirq.c:414 [inline] softirqs last enabled at (4388): [] __do_softirq+0xc14/0xea0 kernel/softirq.c:600 softirqs last disabled at (4393): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79 CPU: 0 PID: 5755 Comm: syz-executor.0 Not tainted 6.1.33-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 pstate: 20400005 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __list_add_valid+0x94/0x110 lib/list_debug.c:39 lr : __list_add include/linux/list.h:69 [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+0x3cc/0x8ac net/sched/sch_fq_pie.c:248 sp : ffff8000080071a0 x29: ffff8000080071a0 x28: ffff00012c4c1da0 x27: ffff0000da4cf2e8 x26: ffff0000da4cf2f0 x25: dfff800000000000 x24: ffff0000da4cf2e0 x23: dfff800000000000 x22: 0000000000000040 x21: ffff0000da4cf2e0 x20: ffff0000da4cf2e8 x19: ffff0000da4cf2e0 x18: ffff800008006ea0 x17: 0000000000000000 x16: ffff8000084fa384 x15: 0000000000000100 x14: 0000000000000000 x13: 0000000000000001 x12: ffff0000ddf65340 x11: ff808000107141e8 x10: 0000000000000000 x9 : ffff8000107141e8 x8 : 0000000000000000 x7 : ffff80000840686c x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff0000da4cf2e0 x1 : ffff0000da4cf2e0 x0 : 0000000000000001 Call trace: __list_add_valid+0x94/0x110 lib/list_debug.c:39 __list_add include/linux/list.h:69 [inline] list_add_tail include/linux/list.h:102 [inline] list_move_tail include/linux/list.h:230 [inline] fq_pie_qdisc_dequeue+0x3cc/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 el0_interrupt+0x80/0x260 arch/arm64/kernel/entry-common.c:717 __el0_irq_handler_common+0x18/0x24 arch/arm64/kernel/entry-common.c:724 el0t_64_irq_handler+0x10/0x1c arch/arm64/kernel/entry-common.c:729 el0t_64_irq+0x18c/0x190 arch/arm64/kernel/entry.S:582