ip6_tunnel: ip6tnl2 xmit: Local address not yet configured! ip6_tunnel: ip6tnl1 xmit: Local address not yet configured! INFO: task kworker/u4:8:4679 blocked for more than 140 seconds. Not tainted 4.14.94+ #12 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:8 D26776 4679 2 0x80000000 Workqueue: events_unbound fsnotify_mark_destroy_workfn Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3490 schedule_timeout+0x736/0xe80 kernel/time/timer.c:1721 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x29c/0x470 kernel/sched/completion.c:123 __synchronize_srcu+0x12a/0x210 kernel/rcu/srcutree.c:898 fsnotify_mark_destroy_workfn+0xfd/0x310 fs/notify/mark.c:757 process_one_work+0x7c6/0x14e0 kernel/workqueue.c:2114 worker_thread+0x5d7/0x1080 kernel/workqueue.c:2248 kthread+0x310/0x420 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402 INFO: task kworker/u4:41:11212 blocked for more than 140 seconds. Not tainted 4.14.94+ #12 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:41 D26456 11212 2 0x80000000 Workqueue: events_unbound fsnotify_connector_destroy_workfn Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3490 schedule_timeout+0x736/0xe80 kernel/time/timer.c:1721 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x29c/0x470 kernel/sched/completion.c:123 __synchronize_srcu+0x12a/0x210 kernel/rcu/srcutree.c:898 fsnotify_connector_destroy_workfn+0x49/0xa0 fs/notify/mark.c:156 process_one_work+0x7c6/0x14e0 kernel/workqueue.c:2114 worker_thread+0x5d7/0x1080 kernel/workqueue.c:2248 kthread+0x310/0x420 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402 INFO: task syz-executor4:13946 blocked for more than 140 seconds. Not tainted 4.14.94+ #12 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor4 D28808 13946 1853 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3490 schedule_timeout+0x736/0xe80 kernel/time/timer.c:1721 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x29c/0x470 kernel/sched/completion.c:123 flush_work+0x3d2/0x710 kernel/workqueue.c:2885 fsnotify_destroy_group+0x124/0x2d0 fs/notify/group.c:85 inotify_release+0x33/0x40 fs/notify/inotify/inotify_user.c:280 __fput+0x25e/0x700 fs/file_table.c:210 task_work_run+0x118/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x13b/0x160 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:267 [inline] do_syscall_64+0x372/0x4b0 arch/x86/entry/common.c:294 INFO: task syz-executor5:13974 blocked for more than 140 seconds. Not tainted 4.14.94+ #12 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D28808 13974 1835 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3490 schedule_timeout+0x736/0xe80 kernel/time/timer.c:1721 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x29c/0x470 kernel/sched/completion.c:123 flush_work+0x3d2/0x710 kernel/workqueue.c:2885 fsnotify_destroy_group+0x124/0x2d0 fs/notify/group.c:85 inotify_release+0x33/0x40 fs/notify/inotify/inotify_user.c:280 __fput+0x25e/0x700 fs/file_table.c:210 task_work_run+0x118/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x13b/0x160 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:267 [inline] do_syscall_64+0x372/0x4b0 arch/x86/entry/common.c:294 Showing all locks held in the system: 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4541 2 locks held by getty/1754: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:275 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156 3 locks held by kworker/0:2/2361: #0: ("%s"("ipv6_addrconf")){+.+.}, at: [] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085 #1: ((addr_chk_work).work){+.+.}, at: [] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089 #2: (rtnl_mutex){+.+.}, at: [] addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4430 2 locks held by kworker/u4:8/4679: #0: ("events_unbound"){+.+.}, at: [] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085 #1: ((reaper_work).work){+.+.}, at: [] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089 2 locks held by syz-executor5/9937: #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] inode_lock include/linux/fs.h:715 [inline] #0: (&sb->s_type->i_mutex_key#8){+.+.}, at: [] __sock_release+0x86/0x250 net/socket.c:601 #1: (rtnl_mutex){+.+.}, at: [] packet_flush_mclist net/packet/af_packet.c:3624 [inline] #1: (rtnl_mutex){+.+.}, at: [] packet_release+0x3a0/0xb80 net/packet/af_packet.c:3034 5 locks held by kworker/u4:39/11206: #0: ("%s""netns"){+.+.}, at: [] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085 #1: (net_cleanup_work){+.+.}, at: [] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089 #2: (net_mutex){+.+.}, at: [] cleanup_net+0x136/0x860 net/core/net_namespace.c:449 #3: (rtnl_mutex){+.+.}, at: [] ip6_tnl_exit_net+0x71/0x550 net/ipv6/ip6_tunnel.c:2265 #4: (rcu_preempt_state.exp_mutex){+.+.}, at: [] exp_funnel_lock kernel/rcu/tree_exp.h:272 [inline] #4: (rcu_preempt_state.exp_mutex){+.+.}, at: [] _synchronize_rcu_expedited+0x307/0x850 kernel/rcu/tree_exp.h:596 2 locks held by kworker/u4:41/11212: #0: ("events_unbound"){+.+.}, at: [] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085 #1: (connector_reaper_work){+.+.}, at: [] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.94+ #12 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xb9/0x10e lib/dump_stack.c:53 nmi_cpu_backtrace.cold+0x47/0x86 lib/nmi_backtrace.c:101 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 2901 Comm: kworker/1:3 Not tainted 4.14.94+ #12 Workqueue: events rtc_timer_do_work task: ffff8881c9589780 task.stack: ffff8881d1680000 RIP: 0010:mark_lock+0xa6/0xfa0 kernel/locking/lockdep.c:3164 RSP: 0018:ffff8881d16879b0 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffffffffa13601c0 RCX: 1ffff110392b13fa RDX: 1ffffffff426c03e RSI: ffff8881c9589fb0 RDI: ffffffffa13601f0 RBP: ffff8881c9589fb0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000040 R13: ffff8881c9589fd0 R14: ffff8881c9589780 R15: 0000000000000006 FS: 0000000000000000(0000) GS:ffff8881db900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd788920070 CR3: 0000000042826003 CR4: 00000000001606a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mark_held_locks+0xa6/0xf0 kernel/locking/lockdep.c:2850 __trace_hardirqs_on_caller kernel/locking/lockdep.c:2879 [inline] trace_hardirqs_on_caller+0x37b/0x540 kernel/locking/lockdep.c:2926 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irqrestore+0x54/0x70 kernel/locking/spinlock.c:192 spin_unlock_irqrestore include/linux/spinlock.h:372 [inline] __wake_up_common_lock+0xe0/0x170 kernel/sched/wait.c:126 rtc_handle_legacy_irq+0x123/0x180 drivers/rtc/interface.c:523 rtc_timer_do_work+0x21d/0x610 drivers/rtc/interface.c:881 process_one_work+0x7c6/0x14e0 kernel/workqueue.c:2114 worker_thread+0x5d7/0x1080 kernel/workqueue.c:2248 kthread+0x310/0x420 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402 Code: 50 01 00 00 48 81 eb 50 01 00 00 48 81 c3 60 08 35 a1 48 8d 7b 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 90 0b 00 00 4c 85 63 30 0f 84 a0 00 00 00 41 bc 01 00 00