watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor.2:13639] Modules linked in: irq event stamp: 17515 hardirqs last enabled at (17514): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline] hardirqs last enabled at (17514): [] exit_to_kernel_mode+0x100/0x178 arch/arm64/kernel/entry-common.c:91 hardirqs last disabled at (17515): [] enter_el1_irq_or_nmi+0x10/0x1c arch/arm64/kernel/entry-common.c:227 softirqs last enabled at (6788): [] softirq_handle_end kernel/softirq.c:401 [inline] softirqs last enabled at (6788): [] __do_softirq+0xb5c/0xe20 kernel/softirq.c:587 softirqs last disabled at (13069): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (13069): [] invoke_softirq kernel/softirq.c:439 [inline] softirqs last disabled at (13069): [] __irq_exit_rcu+0x28c/0x534 kernel/softirq.c:636 CPU: 0 PID: 13639 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: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : preempt_count arch/arm64/include/asm/preempt.h:12 [inline] pc : check_kcov_mode kernel/kcov.c:163 [inline] pc : __sanitizer_cov_trace_pc+0x5c/0xa4 kernel/kcov.c:197 lr : fq_pie_qdisc_dequeue+0xe4/0x874 net/sched/sch_fq_pie.c:240 sp : ffff800008007120 x29: ffff8000080071a0 x28: ffff00010cb34480 x27: 1fffe0002196688e x26: dfff800000000000 x25: ffff0000ca538ae8 x24: ffff0000ca538af0 x23: ffff00010cb34470 x22: ffff0000ca538ae0 x21: ffff0000ca538ae0 x20: ffff00010cb34488 x19: ffff0000ca538ae0 x18: 0000000000000503 x17: ff8080000ff527ac x16: 0000000000000000 x15: ffff80000ff527ac x14: 0000000000000001 x13: ffffffffffffffff x12: 0000000000000100 x11: ff80800010098adc x10: 0000000000000100 x9 : ffff800010098adc x8 : ffff0000d94c51c0 x7 : ffff80000fd8c024 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff0000ca538ae0 x1 : ffff0000ca538ae0 x0 : 0000000000000001 Call trace: check_kcov_mode kernel/kcov.c:163 [inline] __sanitizer_cov_trace_pc+0x5c/0xa4 kernel/kcov.c:197 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 check_preemption_disabled+0x48/0x164 lib/smp_processor_id.c:55 debug_smp_processor_id+0x20/0x2c lib/smp_processor_id.c:60 rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:330 [inline] rcu_is_watching+0x5c/0x18c kernel/rcu/tree.c:1122 trace_lock_acquire include/trace/events/lock.h:13 [inline] lock_acquire+0x100/0x77c kernel/locking/lockdep.c:5593 rcu_lock_acquire+0x38/0x44 include/linux/rcupdate.h:269 rcu_read_lock include/linux/rcupdate.h:696 [inline] __mod_lruvec_page_state+0xa8/0x2cc mm/memcontrol.c:778 page_add_file_rmap+0x658/0x8e4 mm/rmap.c:1248 do_set_pte+0x394/0x584 mm/memory.c:4026 finish_fault+0x3dc/0x8b8 mm/memory.c:4100 do_read_fault mm/memory.c:4225 [inline] do_fault mm/memory.c:4349 [inline] handle_pte_fault mm/memory.c:4608 [inline] __handle_mm_fault mm/memory.c:4743 [inline] handle_mm_fault+0x2210/0x33c4 mm/memory.c:4841 faultin_page mm/gup.c:976 [inline] __get_user_pages+0x39c/0x92c mm/gup.c:1197 populate_vma_page_range+0x200/0x290 mm/gup.c:1529 __mm_populate+0x278/0x41c mm/gup.c:1638 mm_populate include/linux/mm.h:2632 [inline] vm_mmap_pgoff+0x1fc/0x2b4 mm/util.c:556 ksys_mmap_pgoff+0x11c/0x668 mm/mmap.c:1624 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline] __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline] __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21 __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