IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1_virt_wifi: link is not ready hrtimer: interrupt took 39597 ns INFO: rcu_preempt self-detected stall on CPU 1-...: (10500 ticks this GP) idle=3ea/140000000000002/0 softirq=11786/11793 fqs=3 (t=10500 jiffies g=1472 c=1471 q=536) rcu_preempt kthread starved for 10493 jiffies! g1472 c1471 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0 rcu_preempt R running task 29824 8 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384 schedule+0x92/0x1c0 kernel/sched/core.c:3428 schedule_timeout+0x43e/0xe10 kernel/time/timer.c:1746 rcu_gp_kthread+0xbf4/0x1ec0 kernel/rcu/tree.c:2255 kthread+0x319/0x430 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 NMI backtrace for cpu 1 CPU: 1 PID: 7308 Comm: syz-executor142 Not tainted 4.14.162-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+0x142/0x197 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x94 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x141/0x189 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_single_cpu_backtrace include/linux/nmi.h:158 [inline] rcu_dump_cpu_stacks+0x186/0x1d2 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+0x43d/0xd0a kernel/rcu/tree.c:2792 update_process_times+0x31/0x70 kernel/time/timer.c:1590 tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:161 tick_sched_timer+0x43/0x130 kernel/time/tick-sched.c:1219 __run_hrtimer kernel/time/hrtimer.c:1223 [inline] __hrtimer_run_queues+0x270/0xbc0 kernel/time/hrtimer.c:1287 hrtimer_interrupt+0x1d8/0x5d0 kernel/time/hrtimer.c:1321 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline] smp_apic_timer_interrupt+0x11c/0x5e0 arch/x86/kernel/apic/apic.c:1100 apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:should_failslab+0x2b/0x130 mm/failslab.c:20 RSP: 0018:ffff8880aed079f0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff1355293 RBX: ffff8880aa8004c0 RCX: 0000000000000002 RDX: dffffc0000000000 RSI: 0000000001080020 RDI: ffff8880aa8004c0 RBP: ffff8880aed07a00 R08: 1ffffd1ffffb10f0 R09: ffffe8ffffd88780 R10: fffff91ffffb10f0 R11: ffffe8ffffd88787 R12: 0000000001080020 R13: ffff8880aa8004c0 R14: ffffffff87594241 R15: 0000000001080020 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3376 [inline] kmem_cache_alloc_trace+0x4b/0x790 mm/slab.c:3616 kmalloc include/linux/slab.h:488 [inline] dst_cow_metrics_generic+0x4d/0x140 net/core/dst.c:210 ipv6_cow_metrics+0x78/0x180 net/ipv6/route.c:196 dst_metrics_write_ptr include/net/dst.h:146 [inline] dst_metric_set include/net/dst.h:207 [inline] icmp6_dst_alloc+0x3f6/0x580 net/ipv6/route.c:1780 ndisc_send_skb+0xc0f/0x11e0 net/ipv6/ndisc.c:463 ndisc_send_rs+0x12b/0x670 net/ipv6/ndisc.c:677 addrconf_rs_timer+0x289/0x5a0 net/ipv6/addrconf.c:3757 call_timer_fn+0x161/0x670 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+0x5b7/0x1520 kernel/time/timer.c:1649 __do_softirq+0x244/0x9a0 kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x160/0x1b0 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:648 [inline] smp_apic_timer_interrupt+0x146/0x5e0 arch/x86/kernel/apic/apic.c:1102 apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:lock_acquire+0x1f3/0x430 kernel/locking/lockdep.c:3998 RSP: 0018:ffff888098057cf0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff0fe2d29 RBX: ffff888096590180 RCX: 000000001ce5e127 RDX: dffffc0000000000 RSI: ffff888096590a28 RDI: 0000000000000282 RBP: ffff888098057d18 R08: 000000000000148d R09: ffffffff89578ea8 R10: ffff888096590a28 R11: ffff888096590180 R12: ffff8880a9c39598 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:152 spin_lock include/linux/spinlock.h:317 [inline] list_lru_add+0x83/0x480 mm/list_lru.c:111 d_lru_add fs/dcache.c:410 [inline] dentry_lru_add fs/dcache.c:465 [inline] dput.part.0+0x62e/0x750 fs/dcache.c:840 dput+0x20/0x30 fs/dcache.c:811 __fput+0x45f/0x7a0 fs/file_table.c:228 ____fput+0x16/0x20 fs/file_table.c:244 task_work_run+0x114/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1da/0x220 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4bc/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x402b10 RSP: 002b:00007ffc41d83b38 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000402b10 RDX: 0000000000002000 RSI: 0000000000000004 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000100000000 R09: 0000000100000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000dd623 R13: 0000000000403d40 R14: 0000000000000000 R15: 0000000000000000 INFO: rcu_sched detected stalls on CPUs/tasks: 1-...: (10502 ticks this GP) idle=3ea/140000000000001/0 softirq=11786/11793 fqs=4 (detected by 0, t=10554 jiffies, g=929, c=928, q=11) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 7308 Comm: syz-executor142 Not tainted 4.14.162-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff888096590180 task.stack: ffff888098050000 RIP: 0010:__sanitizer_cov_trace_pc+0x9/0x60 kernel/kcov.c:65 RSP: 0018:ffff8880aed07830 EFLAGS: 00000002 RAX: ffff888096590180 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000010100 RSI: ffffffff86cc4240 RDI: ffffffff87049280 RBP: ffff8880aed07868 R08: ffff888096590180 R09: 0000000000000005 R10: 0000000000000000 R11: ffff888096590180 R12: 0000000000000001 R13: ffffffff86cc4240 R14: ffffffff87049280 R15: 000000ebb721560d FS: 0000000001ed8880(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000006d4090 CR3: 0000000095b71000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __this_cpu_preempt_check+0x1d/0x30 lib/smp_processor_id.c:63 tick_program_event+0x1f/0xe0 kernel/time/tick-oneshot.c:29 hrtimer_interrupt+0x329/0x5d0 kernel/time/hrtimer.c:1334 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline] smp_apic_timer_interrupt+0x11c/0x5e0 arch/x86/kernel/apic/apic.c:1100 apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:__sanitizer_cov_trace_pc+0x9/0x60 kernel/kcov.c:65 RSP: 0018:ffff8880aed07a58 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff10 RAX: ffff888096590180 RBX: 1ffff11015da0f50 RCX: 1ffffffff0f837ad RDX: 0000000000000000 RSI: ffffffff87049200 RDI: ffff8880aed2394c RBP: ffff8880aed07b28 R08: 0000000000000001 R09: 0000000000000000 R10: ffff888096590aa0 R11: ffff888096590180 R12: ffff8880aed07b00 R13: 000000000000000a R14: 0000000000000001 R15: ffff888099085a00 NF_HOOK include/linux/netfilter.h:248 [inline] ndisc_send_skb+0x83b/0x11e0 net/ipv6/ndisc.c:483 ndisc_send_rs+0x12b/0x670 net/ipv6/ndisc.c:677 addrconf_rs_timer+0x289/0x5a0 net/ipv6/addrconf.c:3757 call_timer_fn+0x161/0x670 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+0x5b7/0x1520 kernel/time/timer.c:1649 __do_softirq+0x244/0x9a0 kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x160/0x1b0 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:648 [inline] smp_apic_timer_interrupt+0x146/0x5e0 arch/x86/kernel/apic/apic.c:1102 apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:lock_acquire+0x1f3/0x430 kernel/locking/lockdep.c:3998 RSP: 0018:ffff888098057cf0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff0fe2d29 RBX: ffff888096590180 RCX: 000000001ce5e127 RDX: dffffc0000000000 RSI: ffff888096590a28 RDI: 0000000000000282 RBP: ffff888098057d18 R08: 000000000000148d R09: ffffffff89578ea8 R10: ffff888096590a28 R11: ffff888096590180 R12: ffff8880a9c39598 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:152 spin_lock include/linux/spinlock.h:317 [inline] list_lru_add+0x83/0x480 mm/list_lru.c:111 d_lru_add fs/dcache.c:410 [inline] dentry_lru_add fs/dcache.c:465 [inline] dput.part.0+0x62e/0x750 fs/dcache.c:840 dput+0x20/0x30 fs/dcache.c:811 __fput+0x45f/0x7a0 fs/file_table.c:228 ____fput+0x16/0x20 fs/file_table.c:244 task_work_run+0x114/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1da/0x220 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4bc/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x402b10 RSP: 002b:00007ffc41d83b38 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000402b10 RDX: 0000000000002000 RSI: 0000000000000004 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000100000000 R09: 0000000100000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000dd623 R13: 0000000000403d40 R14: 0000000000000000 R15: 0000000000000000 Code: 4c 89 35 9b d7 4c 08 41 be f4 ff ff ff e8 23 33 ee ff 48 c7 05 85 d7 4c 08 00 00 00 00 e9 14 ec ff ff 65 48 8b 04 25 40 ee 01 00 <48> 85 c0 74 1a 65 8b 15 3b 9d a4 7e 81 e2 00 01 1f 00 75 0b 8b IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1_vlan: link is not ready device veth0_vlan entered promiscuous mode device veth1_vlan entered promiscuous mode IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1_virt_wifi: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready