ip6_tunnel: ip6tnl4 xmit: Local address not yet configured! ip6_tunnel: ip6tnl1 xmit: Local address not yet configured! INFO: task kworker/1:5:11258 blocked for more than 140 seconds. Not tainted 4.14.105+ #29 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/1:5 D29640 11258 2 0x80000000 Workqueue: events key_garbage_collector Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3492 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 __wait_rcu_gp+0x235/0x2f0 kernel/rcu/update.c:413 synchronize_rcu.part.0+0xc1/0xd0 kernel/rcu/tree_plugin.h:764 key_garbage_collector+0x2ad/0x7c0 security/keys/gc.c:292 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 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/1756: #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 5 locks held by kworker/u4:9/3360: #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: (cpu_hotplug_lock.rw_sem){++++}, at: [] get_online_cpus include/linux/cpu.h:138 [inline] #4: (cpu_hotplug_lock.rw_sem){++++}, at: [] flush_all_backlogs net/core/dev.c:4653 [inline] #4: (cpu_hotplug_lock.rw_sem){++++}, at: [] rollback_registered_many+0x40a/0xab0 net/core/dev.c:7196 1 lock held by syz-executor.5/10624: #0: (rcu_preempt_state.barrier_mutex){+.+.}, at: [] _rcu_barrier+0x56/0x3e0 kernel/rcu/tree.c:3538 2 locks held by kworker/1:5/11258: #0: ("events"){+.+.}, at: [] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085 #1: (key_gc_work){+.+.}, at: [] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.105+ #29 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: 17123 Comm: syz-executor.0 Not tainted 4.14.105+ #29 task: ffff88819d1bde00 task.stack: ffff88819efc8000 RIP: 0033:0x401597 RSP: 002b:00007f5b2cb3f690 EFLAGS: 00000282 RAX: 00000000b6ecf554 RBX: 000000000000000b RCX: 0000000000457f29 RDX: 67d19fddb8bf661e RSI: 00007f5b2cb3f6c0 RDI: 000000000000000b RBP: 0000000000000000 R08: f79a00752d0a0039 R09: 0000000000000000 R10: c492cc5b7ff2c407 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000140 R15: 00000000200002c0 FS: 00007f5b2cb40700(0000) GS:ffff8881dbb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000940004 CR3: 00000001d44d4005 CR4: 00000000001606a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600