INFO: rcu_preempt self-detected stall on CPU 0-...: (10499 ticks this GP) idle=a66/140000000000002/0 softirq=13534/13534 fqs=3850 (t=10500 jiffies g=2000 c=1999 q=2538) NMI backtrace for cpu 0 CPU: 0 PID: 8016 Comm: syz-executor.3 Not tainted 4.14.172-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x13e/0x194 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x139/0x17e lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:158 [inline] rcu_dump_cpu_stacks+0x16d/0x1b8 kernel/rcu/tree.c:1396 print_cpu_stall kernel/rcu/tree.c:1542 [inline] check_cpu_stall kernel/rcu/tree.c:1610 [inline] __rcu_pending kernel/rcu/tree.c:3390 [inline] rcu_pending kernel/rcu/tree.c:3452 [inline] rcu_check_callbacks.cold+0x490/0xdaa kernel/rcu/tree.c:2792 update_process_times+0x29/0x60 kernel/time/timer.c:1590 tick_sched_handle+0x7d/0x150 kernel/time/tick-sched.c:165 tick_sched_timer+0x3e/0x120 kernel/time/tick-sched.c:1223 __run_hrtimer kernel/time/hrtimer.c:1223 [inline] __hrtimer_run_queues+0x25c/0xbb0 kernel/time/hrtimer.c:1287 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline] smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1100 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:lock_is_held_type+0x17a/0x210 kernel/locking/lockdep.c:4034 RSP: 0018:ffff8880aea07800 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff0fa2ce1 RBX: 0000000000000286 RCX: 1ffffffff14b0f68 RDX: dffffc0000000000 RSI: ffffffff87d84360 RDI: 0000000000000286 RBP: ffff88808bbea480 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff8b0273a0 R14: 0000000000000000 R15: ffff888080db0340 lock_is_held include/linux/lockdep.h:437 [inline] rcu_read_lock_sched_held+0x10a/0x130 kernel/rcu/update.c:116 trace_timer_init include/trace/events/timer.h:33 [inline] debug_init kernel/time/timer.c:737 [inline] init_timer_key+0x244/0x2f0 kernel/time/timer.c:780 neigh_alloc net/core/neighbour.c:336 [inline] __neigh_create+0x452/0x1980 net/core/neighbour.c:499 ip6_finish_output2+0xa8e/0x2150 net/ipv6/ip6_output.c:117 ip6_finish_output+0x4d9/0xaf0 net/ipv6/ip6_output.c:154 NF_HOOK_COND include/linux/netfilter.h:239 [inline] ip6_output+0x1c9/0x650 net/ipv6/ip6_output.c:171 dst_output include/net/dst.h:462 [inline] NF_HOOK include/linux/netfilter.h:250 [inline] ndisc_send_skb+0xb56/0x11e0 net/ipv6/ndisc.c:483 ndisc_send_rs+0x125/0x630 net/ipv6/ndisc.c:677 addrconf_rs_timer+0x289/0x5a0 net/ipv6/addrconf.c:3757 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1279 expire_timers kernel/time/timer.c:1318 [inline] __run_timers kernel/time/timer.c:1636 [inline] __run_timers kernel/time/timer.c:1604 [inline] run_timer_softirq+0x52a/0x1390 kernel/time/timer.c:1649 __do_softirq+0x254/0x9bf kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x15b/0x1a0 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:648 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:lock_acquire+0x1ec/0x3f0 kernel/locking/lockdep.c:3997 RSP: 0018:ffff888049fe7960 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff0fa2ce1 RBX: ffff88808bbea480 RCX: ffffffff8a0a48c0 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000286 RBP: ffffffff87d19a78 R08: ffffffff8a0b6afc R09: ffffffff8a0b5d80 R10: ffff888049fe7780 R11: ffff88808bbea480 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:152 spin_lock include/linux/spinlock.h:317 [inline] pgd_dtor arch/x86/mm/pgtable.c:151 [inline] pgd_free+0x2f/0x210 arch/x86/mm/pgtable.c:414 mm_free_pgd kernel/fork.c:747 [inline] __mmdrop+0x4d/0x200 kernel/fork.c:912 mmdrop include/linux/sched/mm.h:43 [inline] finish_task_switch+0x3d6/0x620 kernel/sched/core.c:2680 context_switch kernel/sched/core.c:2811 [inline] __schedule+0x7c0/0x1ca0 kernel/sched/core.c:3384 preempt_schedule_irq+0xb0/0x140 kernel/sched/core.c:3611 retint_kernel+0x1b/0x2d RIP: 0010:_down_write_nest_lock+0x7b/0x90 kernel/locking/rwsem.c:156 RSP: 0018:ffff888049fe7c10 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff02 RAX: dffffc0000000000 RBX: ffff8880929c6130 RCX: 0000000000000024 RDX: 1ffff11012538c31 RSI: 0000000000000020 RDI: ffff8880929c6188 RBP: ffff88808bbea480 R08: 0000000000000001 R09: 0000000000000000 R10: 00000000000000a0 R11: ffff88808bbea480 R12: ffff8880a8070cc0 R13: ffff88808bbea480 R14: ffff88809900b948 R15: ffff88809900b9c0 vm_lock_anon_vma mm/mmap.c:3383 [inline] mm_take_all_locks+0x434/0x583 mm/mmap.c:3484 do_mmu_notifier_register+0x33a/0x450 mm/mmu_notifier.c:248 kvm_init_mmu_notifier arch/x86/kvm/../../../virt/kvm/kvm_main.c:513 [inline] kvm_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:705 [inline] kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:3270 [inline] kvm_dev_ioctl+0xa14/0x1480 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3321 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45c4a9 RSP: 002b:00007f1e58ff1c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f1e58ff26d4 RCX: 000000000045c4a9 RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000004 RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000390 R14: 00000000004c5cbd R15: 000000000076bf2c INFO: rcu_sched detected stalls on CPUs/tasks: 0-...: (1 GPs behind) idle=a66/140000000000002/0 softirq=13533/13534 fqs=3850 (detected by 1, t=10560 jiffies, g=1468, c=1467, q=10) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 8016 Comm: syz-executor.3 Not tainted 4.14.172-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88808bbea480 task.stack: ffff888049fe0000 RIP: 0010:separate_irq_context kernel/locking/lockdep.c:3111 [inline] RIP: 0010:__lock_acquire+0xa94/0x4620 kernel/locking/lockdep.c:3478 RSP: 0018:ffff8880aea06ec0 EFLAGS: 00000006 RAX: 000000000000000a RBX: 0000000000000012 RCX: ffff88808bbead00 RDX: 1ffff1101177d59f RSI: ffff88808bbeae90 RDI: ffffffff8a0a4f80 RBP: ffff8880aea07068 R08: 0000000000000000 R09: 00000000000a6012 R10: ffff88808bbeae90 R11: ffff88808bbea480 R12: 0000000000000000 R13: 0000000000000012 R14: 000000000000000a R15: b8a61ef51f159d7e FS: 00007f1e58ff2700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc3aef2ff8 CR3: 0000000095a4e000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3994 rcu_lock_acquire include/linux/rcupdate.h:242 [inline] rcu_read_lock include/linux/rcupdate.h:629 [inline] __perf_event_output kernel/events/core.c:6268 [inline] perf_event_output_forward+0x92/0x1f0 kernel/events/core.c:6288 __perf_event_overflow+0x113/0x310 kernel/events/core.c:7526 perf_swevent_hrtimer+0x220/0x350 kernel/events/core.c:8736 __run_hrtimer kernel/time/hrtimer.c:1223 [inline] __hrtimer_run_queues+0x25c/0xbb0 kernel/time/hrtimer.c:1287 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline] smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1100 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:lock_is_held_type+0x17a/0x210 kernel/locking/lockdep.c:4034 RSP: 0018:ffff8880aea07688 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff0fa2ce1 RBX: 0000000000000286 RCX: 1ffffffff14b0f68 RDX: dffffc0000000000 RSI: ffffffff87d843e0 RDI: 0000000000000286 RBP: ffff88808bbea480 R08: 0000000000000000 R09: 0000000000022012 R10: ffff88808bbeae68 R11: ffff88808bbea480 R12: 0000000000000001 R13: ffff88804fcd0680 R14: ffff8880a402e540 R15: ffffffff870a7f60 veth_xmit+0x264/0x300 drivers/net/veth.c:108 __netdev_start_xmit include/linux/netdevice.h:4039 [inline] netdev_start_xmit include/linux/netdevice.h:4048 [inline] xmit_one net/core/dev.c:3009 [inline] dev_hard_start_xmit+0x186/0x890 net/core/dev.c:3025 __dev_queue_xmit+0x1d91/0x25c0 net/core/dev.c:3525 neigh_resolve_output net/core/neighbour.c:1369 [inline] neigh_resolve_output+0x50a/0x8b0 net/core/neighbour.c:1349 neigh_output include/net/neighbour.h:500 [inline] ip6_finish_output2+0x992/0x2150 net/ipv6/ip6_output.c:120 ip6_finish_output+0x4d9/0xaf0 net/ipv6/ip6_output.c:154 NF_HOOK_COND include/linux/netfilter.h:239 [inline] ip6_output+0x1c9/0x650 net/ipv6/ip6_output.c:171 dst_output include/net/dst.h:462 [inline] NF_HOOK include/linux/netfilter.h:250 [inline] ndisc_send_skb+0xb56/0x11e0 net/ipv6/ndisc.c:483 ndisc_send_rs+0x125/0x630 net/ipv6/ndisc.c:677 addrconf_rs_timer+0x289/0x5a0 net/ipv6/addrconf.c:3757 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1279 expire_timers kernel/time/timer.c:1318 [inline] __run_timers kernel/time/timer.c:1636 [inline] __run_timers kernel/time/timer.c:1604 [inline] run_timer_softirq+0x52a/0x1390 kernel/time/timer.c:1649 __do_softirq+0x254/0x9bf kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x15b/0x1a0 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:648 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:lock_acquire+0x1ec/0x3f0 kernel/locking/lockdep.c:3997 RSP: 0018:ffff888049fe7960 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff0fa2ce1 RBX: ffff88808bbea480 RCX: ffffffff8a0a48c0 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000286 RBP: ffffffff87d19a78 R08: ffffffff8a0b6afc R09: ffffffff8a0b5d80 R10: ffff888049fe7780 R11: ffff88808bbea480 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:152 spin_lock include/linux/spinlock.h:317 [inline] pgd_dtor arch/x86/mm/pgtable.c:151 [inline] pgd_free+0x2f/0x210 arch/x86/mm/pgtable.c:414 mm_free_pgd kernel/fork.c:747 [inline] __mmdrop+0x4d/0x200 kernel/fork.c:912 mmdrop include/linux/sched/mm.h:43 [inline] finish_task_switch+0x3d6/0x620 kernel/sched/core.c:2680 context_switch kernel/sched/core.c:2811 [inline] __schedule+0x7c0/0x1ca0 kernel/sched/core.c:3384 preempt_schedule_irq+0xb0/0x140 kernel/sched/core.c:3611 retint_kernel+0x1b/0x2d RIP: 0010:_down_write_nest_lock+0x7b/0x90 kernel/locking/rwsem.c:156 RSP: 0018:ffff888049fe7c10 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff02 RAX: dffffc0000000000 RBX: ffff8880929c6130 RCX: 0000000000000024 RDX: 1ffff11012538c31 RSI: 0000000000000020 RDI: ffff8880929c6188 RBP: ffff88808bbea480 R08: 0000000000000001 R09: 0000000000000000 R10: 00000000000000a0 R11: ffff88808bbea480 R12: ffff8880a8070cc0 R13: ffff88808bbea480 R14: ffff88809900b948 R15: ffff88809900b9c0 vm_lock_anon_vma mm/mmap.c:3383 [inline] mm_take_all_locks+0x434/0x583 mm/mmap.c:3484 do_mmu_notifier_register+0x33a/0x450 mm/mmu_notifier.c:248 kvm_init_mmu_notifier arch/x86/kvm/../../../virt/kvm/kvm_main.c:513 [inline] kvm_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:705 [inline] kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:3270 [inline] kvm_dev_ioctl+0xa14/0x1480 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3321 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xfe0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45c4a9 RSP: 002b:00007f1e58ff1c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f1e58ff26d4 RCX: 000000000045c4a9 RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000004 RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000390 R14: 00000000004c5cbd R15: 000000000076bf2c Code: 14 11 38 d0 7c 08 84 d2 0f 85 35 31 00 00 44 8b 25 92 28 20 09 45 85 e4 0f 85 e5 f6 ff ff e9 8f a0 00 00 48 8b 8c 24 90 00 00 00 <48> 8d 04 80 4c 8d 74 c1 d8 48 b8 00 00 00 00 00 fc ff df 49 8d