Cannot find set identified by id 0 to match Cannot find set identified by id 0 to match INFO: task kworker/1:3:6053 blocked for more than 120 seconds. Not tainted 4.15.0+ #221 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/1:3 D22992 6053 2 0x80000000 Workqueue: events_power_efficient check_lifetime Call Trace: context_switch kernel/sched/core.c:2845 [inline] __schedule+0x8eb/0x2060 kernel/sched/core.c:3421 schedule+0xf5/0x430 kernel/sched/core.c:3480 schedule_preempt_disabled+0x10/0x20 kernel/sched/core.c:3538 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0xaad/0x1a80 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 check_lifetime+0x4e9/0x8d0 net/ipv4/devinet.c:700 process_one_work+0xbbf/0x1af0 kernel/workqueue.c:2113 worker_thread+0x223/0x1990 kernel/workqueue.c:2247 kthread+0x33c/0x400 kernel/kthread.c:238 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:542 Showing all locks held in the system: 3 locks held by kworker/0:1/24: #0: ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: [<00000000ea6cb14c>] process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084 #1: ((addr_chk_work).work){+.+.}, at: [<00000000ccf8e54d>] process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088 #2: (rtnl_mutex){+.+.}, at: [<00000000d8542286>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 2 locks held by khungtaskd/757: #0: (rcu_read_lock){....}, at: [<000000007a7193b5>] check_hung_uninterruptible_tasks kernel/hung_task.c:175 [inline] #0: (rcu_read_lock){....}, at: [<000000007a7193b5>] watchdog+0x1c5/0xd60 kernel/hung_task.c:249 #1: (tasklist_lock){.+.+}, at: [<000000003712cc52>] debug_show_all_locks+0xd3/0x3d0 kernel/locking/lockdep.c:4470 2 locks held by getty/4145: #0: (&tty->ldisc_sem){++++}, at: [<00000000a116195c>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000c4d26882>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131 2 locks held by getty/4146: #0: (&tty->ldisc_sem){++++}, at: [<00000000a116195c>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000c4d26882>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131 2 locks held by getty/4147: #0: (&tty->ldisc_sem){++++}, at: [<00000000a116195c>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000c4d26882>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131 2 locks held by getty/4148: #0: (&tty->ldisc_sem){++++}, at: [<00000000a116195c>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000c4d26882>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131 2 locks held by getty/4149: #0: (&tty->ldisc_sem){++++}, at: [<00000000a116195c>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000c4d26882>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131 2 locks held by getty/4150: #0: (&tty->ldisc_sem){++++}, at: [<00000000a116195c>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000c4d26882>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131 2 locks held by getty/4151: #0: (&tty->ldisc_sem){++++}, at: [<00000000a116195c>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000c4d26882>] n_tty_read+0x2ef/0x1a00 drivers/tty/n_tty.c:2131 3 locks held by kworker/1:3/6053: #0: ((wq_completion)"events_power_efficient"){+.+.}, at: [<00000000ea6cb14c>] process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084 #1: ((check_lifetime_work).work){+.+.}, at: [<00000000ccf8e54d>] process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088 #2: (rtnl_mutex){+.+.}, at: [<00000000d8542286>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 3 locks held by kworker/1:4/6058: #0: ((wq_completion)"events_power_efficient"){+.+.}, at: [<00000000ea6cb14c>] process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084 #1: ((reg_check_chans).work){+.+.}, at: [<00000000ccf8e54d>] process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088 #2: (rtnl_mutex){+.+.}, at: [<00000000d8542286>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syz-executor7/10525: #0: (sk_lock-AF_INET6){+.+.}, at: [<000000003aa50582>] lock_sock include/net/sock.h:1463 [inline] #0: (sk_lock-AF_INET6){+.+.}, at: [<000000003aa50582>] ipv6_getsockopt+0x1c5/0x2e0 net/ipv6/ipv6_sockglue.c:1370 1 lock held by syz-executor7/10527: #0: (rtnl_mutex){+.+.}, at: [<00000000d8542286>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 757 Comm: khungtaskd Not tainted 4.15.0+ #221 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+0x194/0x257 lib/dump_stack.c:53 nmi_cpu_backtrace+0x1d2/0x210 lib/nmi_backtrace.c:103 nmi_trigger_cpumask_backtrace+0x122/0x180 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:138 [inline] check_hung_task kernel/hung_task.c:132 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:190 [inline] watchdog+0x90c/0xd60 kernel/hung_task.c:249 kthread+0x33c/0x400 kernel/kthread.c:238 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:542 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.15.0+ #221 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ktime_get+0x7e/0x3a0 kernel/time/timekeeping.c:759 RSP: 0018:ffff8801db407c30 EFLAGS: 00000093 RAX: ffffffff86a2c340 RBX: ffff8801db426620 RCX: ffffffff816158c8 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000082 RBP: ffff8801db407d18 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff1003b680f8a R13: ffff8801db407cf0 R14: ffff8801db407e68 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001eb8000 CR3: 0000000006a22002 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tick_nohz_irq_enter kernel/time/tick-sched.c:1148 [inline] tick_irq_enter+0x9e/0x390 kernel/time/tick-sched.c:1169 irq_enter+0xb6/0xd0 kernel/softirq.c:346 scheduler_ipi+0x23d/0x820 kernel/sched/core.c:1794 smp_reschedule_interrupt+0xe6/0x670 arch/x86/kernel/smp.c:277 reschedule_interrupt+0xa9/0xb0 arch/x86/entry/entry_64.S:962 RIP: 0010:native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:54 RSP: 0018:ffffffff86a07c38 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff02 RAX: dffffc0000000000 RBX: 1ffffffff0d40f8a RCX: 0000000000000000 RDX: 1ffffffff0d59280 RSI: 0000000000000001 RDI: ffffffff86ac9400 RBP: ffffffff86a07c38 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff86a07cf0 R14: ffffffff87268d60 R15: 0000000000000000 arch_safe_halt arch/x86/include/asm/paravirt.h:93 [inline] default_idle+0xbf/0x430 arch/x86/kernel/process.c:354 arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:345 default_idle_call+0x36/0x90 kernel/sched/idle.c:98 cpuidle_idle_call kernel/sched/idle.c:156 [inline] do_idle+0x24a/0x3b0 kernel/sched/idle.c:246 cpu_startup_entry+0x104/0x120 kernel/sched/idle.c:351 rest_init+0xed/0xf0 init/main.c:436 start_kernel+0x7f1/0x819 init/main.c:716 x86_64_start_reservations+0x2a/0x2c arch/x86/kernel/head64.c:378 x86_64_start_kernel+0x77/0x7a arch/x86/kernel/head64.c:359 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:237 Code: f1 f1 f1 f1 c7 40 04 04 f2 f2 f2 c7 40 08 f2 f2 f2 f2 c7 40 0c 00 f2 f2 f2 c7 40 10 f3 f3 f3 f3 e8 e8 4c 0f 00 8b 15 26 36 c5 05 <85> d2 0f 85 b4 02 00 00 48 c7 c0 f0 93 ac 86 48 bb 00 00 00 00