watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.1:21892] Modules linked in: irq event stamp: 198403 hardirqs last enabled at (198402): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline] hardirqs last enabled at (198402): [] exit_to_kernel_mode+0x100/0x178 arch/arm64/kernel/entry-common.c:91 hardirqs last disabled at (198403): [] enter_el1_irq_or_nmi+0x10/0x1c arch/arm64/kernel/entry-common.c:227 softirqs last enabled at (98974): [] softirq_handle_end kernel/softirq.c:401 [inline] softirqs last enabled at (98974): [] __do_softirq+0xb5c/0xe20 kernel/softirq.c:587 softirqs last disabled at (100995): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (100995): [] invoke_softirq kernel/softirq.c:439 [inline] softirqs last disabled at (100995): [] __irq_exit_rcu+0x28c/0x534 kernel/softirq.c:636 CPU: 0 PID: 21892 Comm: syz-executor.1 Not tainted 5.15.115-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:100 [inline] pc : list_move_tail include/linux/list.h:228 [inline] pc : fq_pie_qdisc_dequeue+0x3b4/0x874 net/sched/sch_fq_pie.c:248 lr : __list_del_entry include/linux/list.h:135 [inline] lr : list_move_tail include/linux/list.h:227 [inline] lr : fq_pie_qdisc_dequeue+0x290/0x874 net/sched/sch_fq_pie.c:248 sp : ffff800008007130 x29: ffff8000080071a0 x28: ffff00013d015f30 x27: 1fffe00027a02be4 x26: dfff800000000000 x25: ffff000139b7a2e8 x24: ffff000139b7a2f0 x23: ffff00013d015f20 x22: ffff000139b7a2e0 x21: ffff000139b7a2e0 x20: ffff000139b7a2e8 x19: ffff000139b7a2e0 x18: 0000000000000502 x17: ff8080000ff51148 x16: 0000000000000000 x15: ffff80000ff51148 x14: 0000000000000001 x13: ffffffffffffffff x12: 0000000000000100 x11: ff808000100974ac x10: 0000000000000000 x9 : ffff8000100974ac x8 : 0000000000000000 x7 : ffff80000fd8ab98 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff00013d015f30 x1 : 0000000000000000 x0 : ffff00013d015f38 Call trace: list_add_tail include/linux/list.h:100 [inline] list_move_tail include/linux/list.h:228 [inline] fq_pie_qdisc_dequeue+0x3b4/0x874 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+0x1ec/0x1fc0 net/sched/sch_generic.c:415 __dev_xmit_skb net/core/dev.c:3879 [inline] __dev_queue_xmit+0x1068/0x2a6c net/core/dev.c:4190 dev_queue_xmit+0x24/0x34 net/core/dev.c:4258 neigh_connected_output+0x334/0x378 net/core/neighbour.c:1553 neigh_output include/net/neighbour.h:516 [inline] ip6_finish_output2+0x1344/0x1c48 net/ipv6/ip6_output.c:126 __ip6_finish_output+0x518/0x67c net/ipv6/ip6_output.c:191 ip6_finish_output+0x40/0x218 net/ipv6/ip6_output.c:201 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip6_output+0x270/0x594 net/ipv6/ip6_output.c:224 dst_output include/net/dst.h:449 [inline] NF_HOOK include/linux/netfilter.h:307 [inline] ndisc_send_skb+0xbf8/0x1788 net/ipv6/ndisc.c:508 ndisc_send_rs+0x494/0x5fc net/ipv6/ndisc.c:702 addrconf_rs_timer+0x308/0x5a8 net/ipv6/addrconf.c:3932 call_timer_fn+0x19c/0x8f0 kernel/time/timer.c:1421 expire_timers kernel/time/timer.c:1466 [inline] __run_timers+0x554/0x718 kernel/time/timer.c:1737 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:1750 __do_softirq+0x344/0xe20 kernel/softirq.c:558 do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] invoke_softirq kernel/softirq.c:439 [inline] __irq_exit_rcu+0x28c/0x534 kernel/softirq.c:636 irq_exit+0x14/0x88 kernel/softirq.c:660 handle_domain_irq+0xf4/0x178 kernel/irq/irqdesc.c:710 gic_handle_irq+0x78/0x1c8 drivers/irqchip/irq-gic-v3.c:757 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:899 do_interrupt_handler+0x74/0x94 arch/arm64/kernel/entry-common.c:267 el1_interrupt+0x30/0x58 arch/arm64/kernel/entry-common.c:442 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:458 el1h_64_irq+0x78/0x7c arch/arm64/kernel/entry.S:580 arch_local_irq_restore arch/arm64/include/asm/irqflags.h:122 [inline] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irqrestore+0xbc/0x158 kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:418 [inline] __wake_up_common_lock kernel/sched/wait.c:140 [inline] __wake_up_sync_key+0x124/0x1ac kernel/sched/wait.c:205 __unix_dgram_recvmsg+0x4c4/0xe64 net/unix/af_unix.c:2344 unix_dgram_recvmsg+0xd4/0xec net/unix/af_unix.c:2415 ____sys_recvmsg+0x234/0x720 ___sys_recvmsg+0x240/0x2cc net/socket.c:2673 do_recvmmsg+0x310/0x9a4 net/socket.c:2767 __sys_recvmmsg net/socket.c:2846 [inline] __do_sys_recvmmsg net/socket.c:2869 [inline] __se_sys_recvmmsg net/socket.c:2862 [inline] __arm64_sys_recvmmsg+0x180/0x23c net/socket.c:2862 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584