watchdog: BUG: soft lockup - CPU#1 stuck for 24s! [ksoftirqd/1:20] Modules linked in: irq event stamp: 286925 hardirqs last enabled at (286924): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline] hardirqs last enabled at (286924): [] exit_to_kernel_mode+0x100/0x178 arch/arm64/kernel/entry-common.c:91 hardirqs last disabled at (286925): [] enter_el1_irq_or_nmi+0x10/0x1c arch/arm64/kernel/entry-common.c:227 softirqs last enabled at (267626): [] softirq_handle_end kernel/softirq.c:401 [inline] softirqs last enabled at (267626): [] handle_softirqs+0xb88/0xdbc kernel/softirq.c:586 softirqs last disabled at (267631): [] run_ksoftirqd+0x6c/0x29c kernel/softirq.c:925 CPU: 1 PID: 20 Comm: ksoftirqd/1 Not tainted 5.15.172-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 pstate: 40400005 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : fq_dequeue+0x5a0/0x18fc net/sched/sch_fq.c:561 lr : fq_dequeue+0x578/0x18fc net/sched/sch_fq.c:551 sp : ffff80001bcf66a0 x29: ffff80001bcf67c0 x28: 1fffe0001c84d450 x27: 00000017da131ab8 x26: dfff800000000000 x25: ffff0000e426a240 x24: ffff0000d5a082e8 x23: 1fffe0001c84d4b1 x22: ffff0000e426a280 x21: ffff0000d5a082d0 x20: 1fffe0001ab4105a x19: ffff0000e426a588 x18: 0000000000000901 x17: 0000000000000000 x16: ffff8000082ec8b8 x15: 0000000000000001 x14: 1ffff0000295806a x13: dfff800000000000 x12: 0000000000000003 x11: 0000000000000901 x10: 0000000000000000 x9 : ffff0000c0a78000 x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000000 x3 : ffff80000804605c x2 : 0000000000000002 x1 : 00000000f04e922a x0 : 0000000000000001 Call trace: fq_dequeue+0x5a0/0x18fc net/sched/sch_fq.c:561 dequeue_skb net/sched/sch_generic.c:292 [inline] qdisc_restart net/sched/sch_generic.c:397 [inline] __qdisc_run+0x1ec/0x1fc0 net/sched/sch_generic.c:415 __dev_xmit_skb net/core/dev.c:3910 [inline] __dev_queue_xmit+0x1038/0x2ac8 net/core/dev.c:4221 dev_queue_xmit+0x24/0x34 net/core/dev.c:4289 neigh_hh_output include/net/neighbour.h:493 [inline] neigh_output include/net/neighbour.h:507 [inline] ip_finish_output2+0xd3c/0x131c net/ipv4/ip_output.c:228 __ip_finish_output+0x1b0/0x458 ip_finish_output+0x40/0x218 net/ipv4/ip_output.c:316 NF_HOOK_COND include/linux/netfilter.h:291 [inline] ip_output+0x330/0x49c net/ipv4/ip_output.c:430 dst_output include/net/dst.h:443 [inline] ip_local_out+0x120/0x160 net/ipv4/ip_output.c:126 iptunnel_xmit+0x40c/0x8fc net/ipv4/ip_tunnel_core.c:82 udp_tunnel_xmit_skb+0x178/0x284 net/ipv4/udp_tunnel_core.c:175 geneve_xmit_skb drivers/net/geneve.c:1006 [inline] geneve_xmit+0x24cc/0x323c drivers/net/geneve.c:1119 __netdev_start_xmit include/linux/netdevice.h:5019 [inline] netdev_start_xmit include/linux/netdevice.h:5033 [inline] xmit_one net/core/dev.c:3617 [inline] dev_hard_start_xmit+0x2bc/0x92c net/core/dev.c:3633 __dev_queue_xmit+0x1378/0x2ac8 net/core/dev.c:4256 dev_queue_xmit+0x24/0x34 net/core/dev.c:4289 neigh_hh_output include/net/neighbour.h:493 [inline] neigh_output include/net/neighbour.h:507 [inline] ip6_finish_output2+0x132c/0x1cec net/ipv6/ip6_output.c:130 __ip6_finish_output+0x580/0x6ec net/ipv6/ip6_output.c:201 ip6_finish_output+0x40/0x218 net/ipv6/ip6_output.c:211 NF_HOOK_COND include/linux/netfilter.h:291 [inline] ip6_output+0x274/0x594 net/ipv6/ip6_output.c:234 dst_output include/net/dst.h:443 [inline] NF_HOOK include/linux/netfilter.h:302 [inline] ndisc_send_skb+0xbf8/0x1788 net/ipv6/ndisc.c:511 ndisc_send_rs+0x494/0x5fc net/ipv6/ndisc.c:705 addrconf_rs_timer+0x308/0x5a8 net/ipv6/addrconf.c:3959 call_timer_fn+0x19c/0x8f0 kernel/time/timer.c:1451 expire_timers kernel/time/timer.c:1496 [inline] __run_timers+0x554/0x718 kernel/time/timer.c:1767 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:1780 handle_softirqs+0x384/0xdbc kernel/softirq.c:558 run_ksoftirqd+0x6c/0x29c kernel/softirq.c:925 smpboot_thread_fn+0x4b0/0x920 kernel/smpboot.c:164 kthread+0x37c/0x45c kernel/kthread.c:334 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870