watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.2:6393] Modules linked in: irq event stamp: 14891 hardirqs last enabled at (14890): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline] hardirqs last enabled at (14890): [] exit_to_kernel_mode+0x100/0x178 arch/arm64/kernel/entry-common.c:91 hardirqs last disabled at (14891): [] enter_el1_irq_or_nmi+0x10/0x1c arch/arm64/kernel/entry-common.c:227 softirqs last enabled at (3650): [] softirq_handle_end kernel/softirq.c:401 [inline] softirqs last enabled at (3650): [] __do_softirq+0xb5c/0xe20 kernel/softirq.c:587 softirqs last disabled at (8437): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (8437): [] invoke_softirq kernel/softirq.c:439 [inline] softirqs last disabled at (8437): [] __irq_exit_rcu+0x28c/0x534 kernel/softirq.c:636 CPU: 1 PID: 6393 Comm: syz-executor.2 Not tainted 5.15.116-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __list_del_entry_valid+0x54/0x150 lib/list_debug.c:51 lr : __list_del_entry include/linux/list.h:132 [inline] lr : list_move_tail include/linux/list.h:227 [inline] lr : fq_pie_qdisc_dequeue+0x288/0x874 net/sched/sch_fq_pie.c:248 sp : ffff800008017100 x29: ffff800008017100 x28: ffff000109539880 x27: 1fffe000212a730e x26: dfff800000000000 x25: ffff0000d03b82e8 x24: ffff0000d03b82f0 x23: ffff000109539870 x22: ffff0000d03b82e0 x21: dfff800000000000 x20: ffff0000d03b82e0 x19: ffff000109539880 x18: 0000000000000502 x17: ff8080000ff527ac x16: 0000000000000000 x15: ffff80000ff527ac x14: 0000000000000001 x13: ffffffffffffffff x12: 0000000000000100 x11: ff80800010098b18 x10: 0000000000000000 x9 : ffff0000d03b8328 x8 : 0000000000000000 x7 : ffff80000fd8c024 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff0000d03b82e0 x1 : 0000000000000000 x0 : ffff000109539888 Call trace: __list_del_entry_valid+0x54/0x150 lib/list_debug.c:49 __list_del_entry include/linux/list.h:132 [inline] list_move_tail include/linux/list.h:227 [inline] fq_pie_qdisc_dequeue+0x288/0x874 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_enable arch/arm64/include/asm/irqflags.h:35 [inline] raw_spin_rq_unlock_irq kernel/sched/sched.h:1338 [inline] finish_lock_switch+0xc4/0x1e8 kernel/sched/core.c:4780 finish_task_switch+0x120/0x6b4 kernel/sched/core.c:4898 context_switch kernel/sched/core.c:5029 [inline] __schedule+0xf14/0x1e38 kernel/sched/core.c:6372 schedule+0x11c/0x1c8 kernel/sched/core.c:6455 schedule_timeout+0xb8/0x344 kernel/time/timer.c:1860 unix_wait_for_peer+0x1d8/0x2a8 net/unix/af_unix.c:1315 unix_dgram_sendmsg+0xd88/0x1654 net/unix/af_unix.c:1913 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg net/socket.c:724 [inline] ____sys_sendmsg+0x584/0x870 net/socket.c:2412 ___sys_sendmsg+0x214/0x294 net/socket.c:2466 __sys_sendmmsg+0x23c/0x648 net/socket.c:2552 __do_sys_sendmmsg net/socket.c:2581 [inline] __se_sys_sendmmsg net/socket.c:2578 [inline] __arm64_sys_sendmmsg+0xa0/0xbc net/socket.c:2578 __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