watchdog: BUG: soft lockup - CPU#0 stuck for 21s! [swapper/0:0] Modules linked in: irq event stamp: 9265739 hardirqs last enabled at (9265738): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (9265739): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (9258454): [] irq_enter+0xbd/0xd0 kernel/softirq.c:354 softirqs last disabled at (9258455): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (9258455): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 RIP: 0010:fq_dequeue+0x79b/0x12b0 net/sched/sch_fq.c:488 Code: 08 3c 03 0f 8e bc 09 00 00 44 03 ab 20 03 00 00 48 8d 7d 40 48 89 f8 48 c1 e8 03 44 89 6d 34 42 80 3c 20 00 0f 85 a5 09 00 00 <4c> 89 f8 4c 8b 6d 40 48 c1 e8 03 42 80 3c 20 00 0f 85 13 09 00 00 RSP: 0018:ffff8880ba0073a0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 1ffff11012aa1008 RBX: ffff8880b534a000 RCX: ffffffff8699cbf7 RDX: 0000000000000100 RSI: ffffffff8699cd5b RDI: ffff888095508040 RBP: ffff888095508000 R08: ffffffff8c665018 R09: 0000000000000000 R10: 0000000000000005 R11: ffffffff8c66501b R12: dffffc0000000000 R13: 00000000dfb9c976 R14: ffff8880b534a280 R15: ffff8880b534a290 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6ad14fdcd0 CR3: 00000000ab865000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dequeue_skb net/sched/sch_generic.c:282 [inline] qdisc_restart net/sched/sch_generic.c:385 [inline] __qdisc_run+0x1b9/0x1640 net/sched/sch_generic.c:403 __dev_xmit_skb net/core/dev.c:3500 [inline] __dev_queue_xmit+0x1518/0x2e00 net/core/dev.c:3807 neigh_hh_output include/net/neighbour.h:491 [inline] neigh_output include/net/neighbour.h:499 [inline] ip6_finish_output2+0xde7/0x2290 net/ipv6/ip6_output.c:120 ip6_finish_output+0x89b/0x10f0 net/ipv6/ip6_output.c:192 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip6_output+0x205/0x770 net/ipv6/ip6_output.c:209 dst_output include/net/dst.h:455 [inline] ip6_local_out+0xaf/0x170 net/ipv6/output_core.c:160 ip6_send_skb+0xb3/0x300 net/ipv6/ip6_output.c:1741 ip6_push_pending_frames+0xbd/0xe0 net/ipv6/ip6_output.c:1761 icmpv6_push_pending_frames+0x294/0x470 net/ipv6/icmp.c:288 icmp6_send+0x1c0f/0x22c0 net/ipv6/icmp.c:584 __icmpv6_send include/linux/icmpv6.h:28 [inline] icmpv6_send include/linux/icmpv6.h:49 [inline] ip6_link_failure+0x2d/0x4f0 net/ipv6/route.c:2297 dst_link_failure include/net/dst.h:438 [inline] ndisc_error_report+0xc7/0x190 net/ipv6/ndisc.c:695 neigh_invalidate+0x22c/0x540 net/core/neighbour.c:900 neigh_timer_handler+0x9b2/0xc70 net/core/neighbour.c:986 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:61 Code: 48 89 df e8 f4 20 7f f9 e9 2e ff ff ff 48 89 df e8 e7 20 7f f9 eb 82 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 14 43 4e 00 fb f4 90 e9 07 00 00 00 0f 00 2d 04 43 4e 00 f4 c3 90 90 41 56 41 55 RSP: 0018:ffffffff89e07d40 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3054 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff89e78904 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff89f18290 R13: 1ffffffff13c0fb2 R14: 0000000000000000 R15: 0000000000000000 arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline] default_idle+0x49/0x310 arch/x86/kernel/process.c:557 cpuidle_idle_call kernel/sched/idle.c:153 [inline] do_idle+0x2ec/0x4b0 kernel/sched/idle.c:263 cpu_startup_entry+0xc5/0xe0 kernel/sched/idle.c:369 start_kernel+0x8d6/0x911 init/main.c:736 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60