IPVS: stopping backup sync thread 7874 ... random: crng init done INFO: task kworker/0:0:3 blocked for more than 120 seconds. Not tainted 4.16.0-rc7+ #292 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/0:0 D24240 3 2 0x80000000 Workqueue: events_power_efficient reg_check_chans_work Call Trace: context_switch kernel/sched/core.c:2862 [inline] __schedule+0x8fb/0x1ec0 kernel/sched/core.c:3440 schedule+0xf5/0x430 kernel/sched/core.c:3499 schedule_preempt_disabled+0x10/0x20 kernel/sched/core.c:3557 __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 reg_check_chans_work+0xaa/0xff0 net/wireless/reg.c:2205 process_one_work+0xc47/0x1bb0 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:406 Showing all locks held in the system: 3 locks held by kworker/0:0/3: #0: ((wq_completion)"events_power_efficient"){+.+.}, at: [<00000000eafbe2a0>] work_static include/linux/workqueue.h:198 [inline] #0: ((wq_completion)"events_power_efficient"){+.+.}, at: [<00000000eafbe2a0>] set_work_data kernel/workqueue.c:619 [inline] #0: ((wq_completion)"events_power_efficient"){+.+.}, at: [<00000000eafbe2a0>] set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: ((wq_completion)"events_power_efficient"){+.+.}, at: [<00000000eafbe2a0>] process_one_work+0xb12/0x1bb0 kernel/workqueue.c:2084 #1: ((reg_check_chans).work){+.+.}, at: [<0000000027da5429>] process_one_work+0xb89/0x1bb0 kernel/workqueue.c:2088 #2: (rtnl_mutex){+.+.}, at: [<00000000d6cdc639>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 2 locks held by kworker/1:1/24: #0: ((wq_completion)"events"){+.+.}, at: [<00000000eafbe2a0>] work_static include/linux/workqueue.h:198 [inline] #0: ((wq_completion)"events"){+.+.}, at: [<00000000eafbe2a0>] set_work_data kernel/workqueue.c:619 [inline] #0: ((wq_completion)"events"){+.+.}, at: [<00000000eafbe2a0>] set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: ((wq_completion)"events"){+.+.}, at: [<00000000eafbe2a0>] process_one_work+0xb12/0x1bb0 kernel/workqueue.c:2084 #1: ((work_completion)(&smc->tcp_listen_work)){+.+.}, at: [<0000000027da5429>] process_one_work+0xb89/0x1bb0 kernel/workqueue.c:2088 2 locks held by khungtaskd/876: #0: (rcu_read_lock){....}, at: [<0000000038723967>] check_hung_uninterruptible_tasks kernel/hung_task.c:175 [inline] #0: (rcu_read_lock){....}, at: [<0000000038723967>] watchdog+0x1c5/0xd60 kernel/hung_task.c:249 #1: (tasklist_lock){.+.+}, at: [<00000000724a2493>] debug_show_all_locks+0xd3/0x3d0 kernel/locking/lockdep.c:4470 2 locks held by getty/4461: #0: (&tty->ldisc_sem){++++}, at: [<000000003073472e>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000a577e4e3>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4462: #0: (&tty->ldisc_sem){++++}, at: [<000000003073472e>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000a577e4e3>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4463: #0: (&tty->ldisc_sem){++++}, at: [<000000003073472e>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000a577e4e3>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4464: #0: (&tty->ldisc_sem){++++}, at: [<000000003073472e>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000a577e4e3>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4465: #0: (&tty->ldisc_sem){++++}, at: [<000000003073472e>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000a577e4e3>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4466: #0: (&tty->ldisc_sem){++++}, at: [<000000003073472e>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000a577e4e3>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4467: #0: (&tty->ldisc_sem){++++}, at: [<000000003073472e>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000a577e4e3>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by kworker/0:2/5701: #0: ((wq_completion)"events"){+.+.}, at: [<00000000eafbe2a0>] work_static include/linux/workqueue.h:198 [inline] #0: ((wq_completion)"events"){+.+.}, at: [<00000000eafbe2a0>] set_work_data kernel/workqueue.c:619 [inline] #0: ((wq_completion)"events"){+.+.}, at: [<00000000eafbe2a0>] set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: ((wq_completion)"events"){+.+.}, at: [<00000000eafbe2a0>] process_one_work+0xb12/0x1bb0 kernel/workqueue.c:2084 #1: ((work_completion)(&smc->tcp_listen_work)){+.+.}, at: [<0000000027da5429>] process_one_work+0xb89/0x1bb0 kernel/workqueue.c:2088 3 locks held by kworker/1:5/7558: #0: ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: [<00000000eafbe2a0>] work_static include/linux/workqueue.h:198 [inline] #0: ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: [<00000000eafbe2a0>] set_work_data kernel/workqueue.c:619 [inline] #0: ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: [<00000000eafbe2a0>] set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: [<00000000eafbe2a0>] process_one_work+0xb12/0x1bb0 kernel/workqueue.c:2084 #1: ((addr_chk_work).work){+.+.}, at: [<0000000027da5429>] process_one_work+0xb89/0x1bb0 kernel/workqueue.c:2088 #2: (rtnl_mutex){+.+.}, at: [<00000000d6cdc639>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 2 locks held by syz-executor2/7872: #0: (rtnl_mutex){+.+.}, at: [<00000000d6cdc639>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 #1: (ipvs->sync_mutex){+.+.}, at: [<000000004d9f68f6>] do_ip_vs_set_ctl+0x10f8/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2388 1 lock held by syz-executor2/7881: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000037da10e9>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by ipvs-b:3:0/7874: #0: (rtnl_mutex){+.+.}, at: [<00000000d6cdc639>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syz-executor6/7879: #0: (rtnl_mutex){+.+.}, at: [<000000008fa3d091>] rtnl_lock net/core/rtnetlink.c:74 [inline] #0: (rtnl_mutex){+.+.}, at: [<000000008fa3d091>] rtnetlink_rcv_msg+0x508/0xb10 net/core/rtnetlink.c:4643 1 lock held by syz-executor4/7895: #0: (rtnl_mutex){+.+.}, at: [<00000000d6cdc639>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syz-executor5/7916: #0: (rtnl_mutex){+.+.}, at: [<00000000d6cdc639>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 876 Comm: khungtaskd Not tainted 4.16.0-rc7+ #292 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+0x194/0x24d lib/dump_stack.c:53 nmi_cpu_backtrace+0x1d2/0x210 lib/nmi_backtrace.c:103 nmi_trigger_cpumask_backtrace+0x123/0x180 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:406 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.16.0-rc7+ #292 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:reschedule_interrupt+0x0/0x20 arch/x86/entry/entry_64.S:880 RSP: 0018:ffff8801d9b2fc88 EFLAGS: 00000082 RAX: dffffc0000000000 RBX: 1ffff1003b365f99 RCX: 0000000000000000 RDX: 1ffffffff10a24f0 RSI: 0000000000000001 RDI: ffffffff88512780 RBP: ffff8801d9b2fcb0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: ffff8801d9b2fd68 R14: ffffffff88ee3fa0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000011ec000 CR3: 000000000846a006 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: arch_safe_halt arch/x86/include/asm/paravirt.h:94 [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 start_secondary+0x40a/0x590 arch/x86/kernel/smpboot.c:267 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:239 Code: 90 66 2e 0f 1f 84 00 00 00 00 00 68 03 ff ff ff e8 e6 ef ff ff e8 11 29 00 00 e9 cb f0 ff ff 66 90 66 2e 0f 1f 84 00 00 00 00 00 <68> 02 ff ff ff e8 c6 ef ff ff e8 a1 22 00 00 e9 ab f0 ff ff 66