watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.4:8834] Modules linked in: irq event stamp: 194295 hardirqs last enabled at (194294): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline] hardirqs last enabled at (194294): [] exit_to_kernel_mode+0xe8/0x118 arch/arm64/kernel/entry-common.c:94 hardirqs last disabled at (194295): [] __el1_irq arch/arm64/kernel/entry-common.c:468 [inline] hardirqs last disabled at (194295): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:486 softirqs last enabled at (84136): [] softirq_handle_end kernel/softirq.c:414 [inline] softirqs last enabled at (84136): [] __do_softirq+0xc14/0xea0 kernel/softirq.c:600 softirqs last disabled at (85375): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79 CPU: 1 PID: 8834 Comm: syz-executor.4 Not tainted 6.1.32-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) 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+0x3b8/0x8ac 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 : ffff8000080171e0 x29: ffff800008017250 x28: ffff000113cacfb0 x27: ffff0000db5a3ae8 x26: ffff0000db5a3af0 x25: dfff800000000000 x24: ffff0000db5a3ae0 x23: ffff000113cacfa0 x22: 0000000000000040 x21: ffff0000db5a3ae0 x20: ffff0000db5a3ae8 x19: ffff0000db5a3ae0 x18: ffff0000cc5a8008 x17: 0000000000000000 x16: ffff8000084fa384 x15: 0000000000000100 x14: 0000000000000000 x13: 0000000000000001 x12: ffff0001251b8000 x11: ff80800010718f60 x10: 0000000000000000 x9 : ffff800010718f60 x8 : 0000000000000000 x7 : ffff80000840686c x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff000113cacfb0 x1 : 0000000000000000 x0 : ffff000113cacfb8 Call trace: list_add_tail include/linux/list.h:102 [inline] list_move_tail include/linux/list.h:230 [inline] fq_pie_qdisc_dequeue+0x3b8/0x8ac 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 arch/arm64/include/asm/irqflags.h:35 [inline] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline] finish_lock_switch+0xc4/0x1e8 kernel/sched/core.c:5000 finish_task_switch+0x120/0x624 kernel/sched/core.c:5118 context_switch kernel/sched/core.c:5244 [inline] __schedule+0xee8/0x1c98 kernel/sched/core.c:6554 preempt_schedule_common+0xf4/0x1e8 kernel/sched/core.c:6723 preempt_schedule+0x64/0x84 kernel/sched/core.c:6747 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock_irqrestore+0xa8/0xac kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:405 [inline] __wake_up_common_lock kernel/sched/wait.c:140 [inline] __wake_up_sync_key+0x124/0x1ac kernel/sched/wait.c:208 __unix_dgram_recvmsg+0x4c4/0xe2c net/unix/af_unix.c:2478 unix_dgram_recvmsg+0xd0/0xe8 net/unix/af_unix.c:2548 ____sys_recvmsg+0x234/0x69c ___sys_recvmsg net/socket.c:2743 [inline] do_recvmmsg+0x41c/0xb60 net/socket.c:2837 __sys_recvmmsg net/socket.c:2916 [inline] __do_sys_recvmmsg net/socket.c:2939 [inline] __se_sys_recvmmsg net/socket.c:2932 [inline] __arm64_sys_recvmmsg+0x180/0x23c net/socket.c:2932 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581