watchdog: BUG: soft lockup - CPU#1 stuck for 26s! [syz-executor.3:6366] Modules linked in: irq event stamp: 36953 hardirqs last enabled at (36952): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline] hardirqs last enabled at (36952): [] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:94 hardirqs last disabled at (36953): [] __el1_irq arch/arm64/kernel/entry-common.c:470 [inline] hardirqs last disabled at (36953): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:488 softirqs last enabled at (28942): [] softirq_handle_end kernel/softirq.c:414 [inline] softirqs last enabled at (28942): [] __do_softirq+0xac0/0xd54 kernel/softirq.c:600 softirqs last disabled at (30381): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 CPU: 1 PID: 6366 Comm: syz-executor.3 Not tainted 6.4.0-rc5-syzkaller-gf86b85033b8c #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 : preempt_count arch/arm64/include/asm/preempt.h:13 [inline] pc : check_kcov_mode kernel/kcov.c:173 [inline] pc : __sanitizer_cov_trace_pc+0x14/0x7c kernel/kcov.c:207 lr : __list_add include/linux/list.h:72 [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+0x3d4/0x8ac net/sched/sch_fq_pie.c:248 sp : ffff800080017200 x29: ffff800080017280 x28: ffff00012c016240 x27: ffff0000dc2ca2e8 x26: ffff0000dc2ca2f0 x25: dfff800000000000 x24: ffff0000dc2ca2e0 x23: ffff00012c016230 x22: 0000000000000040 x21: ffff0000dc2ca2e0 x20: ffff0000dc2ca2e8 x19: ffff0000dc2ca2e0 x18: ffff800080016e40 x17: 0000000000000000 x16: ffff80008050c16c x15: 0000000000000302 x14: 0000000000000100 x13: 0000000000000000 x12: 0000000000000001 x11: 0000000000000302 x10: 0000000000000100 x9 : 0000000000000302 x8 : ffff0000df320000 x7 : ffff80008041c668 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff0000dc2ca2e0 x1 : ffff0000dc2ca2e0 x0 : 0000000000000001 Call trace: preempt_count arch/arm64/include/asm/preempt.h:13 [inline] check_kcov_mode kernel/kcov.c:173 [inline] __sanitizer_cov_trace_pc+0x14/0x7c kernel/kcov.c:207 dequeue_skb net/sched/sch_generic.c:292 [inline] qdisc_restart net/sched/sch_generic.c:397 [inline] __qdisc_run+0x1fc/0x231c net/sched/sch_generic.c:415 __dev_xmit_skb net/core/dev.c:3868 [inline] __dev_queue_xmit+0xc80/0x3318 net/core/dev.c:4210 dev_queue_xmit include/linux/netdevice.h:3085 [inline] neigh_connected_output+0x2f8/0x38c net/core/neighbour.c:1581 neigh_output include/net/neighbour.h:544 [inline] ip6_finish_output2+0xd60/0x1a1c 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:292 [inline] ip6_output+0x270/0x594 net/ipv6/ip6_output.c:227 dst_output include/net/dst.h:458 [inline] NF_HOOK include/linux/netfilter.h:303 [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+0x19c/0x8cc kernel/time/timer.c:1700 expire_timers kernel/time/timer.c:1751 [inline] __run_timers+0x55c/0x734 kernel/time/timer.c:2022 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:2035 __do_softirq+0x2d0/0xd54 kernel/softirq.c:571 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:882 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:85 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:474 [inline] el1_interrupt+0x38/0x68 arch/arm64/kernel/entry-common.c:488 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:493 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:587 __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:33 [inline] arch_local_irq_enable arch/arm64/include/asm/irqflags.h:55 [inline] raw_spin_rq_unlock_irq kernel/sched/sched.h:1378 [inline] finish_lock_switch+0xc0/0x1e4 kernel/sched/core.c:5095 finish_task_switch+0x120/0x618 kernel/sched/core.c:5213 context_switch kernel/sched/core.c:5346 [inline] __schedule+0x136c/0x23b8 kernel/sched/core.c:6669 schedule+0xc4/0x170 kernel/sched/core.c:6745 do_notify_resume+0x1dc/0x3c90 arch/arm64/kernel/signal.c:1288 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:144 [inline] el0_interrupt+0xc0/0x25c arch/arm64/kernel/entry-common.c:732 __el0_irq_handler_common+0x18/0x24 arch/arm64/kernel/entry-common.c:737 el0t_64_irq_handler+0x10/0x1c arch/arm64/kernel/entry-common.c:742 el0t_64_irq+0x190/0x194 arch/arm64/kernel/entry.S:592