ip6_tunnel: ip6tnl1 xmit: Local address not yet configured! INFO: task kworker/u4:4:1864 blocked for more than 140 seconds. Not tainted 4.14.108+ #38 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:4 D26376 1864 2 0x80000000 Workqueue: netns cleanup_net Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x559/0x1430 kernel/locking/mutex.c:893 cleanup_net+0x136/0x860 net/core/net_namespace.c:449 process_one_work+0x7c6/0x1510 kernel/workqueue.c:2134 worker_thread+0x5d7/0x1080 kernel/workqueue.c:2271 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 3 locks held by kworker/u4:4/1864: #0: ("%s""netns"){+.+.}, at: [] process_one_work+0x6e5/0x1510 kernel/workqueue.c:2105 #1: (net_cleanup_work){+.+.}, at: [] process_one_work+0x71b/0x1510 kernel/workqueue.c:2109 #2: (net_mutex){+.+.}, at: [] cleanup_net+0x136/0x860 net/core/net_namespace.c:449 1 lock held by syz-executor.4/25918: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x156/0x440 net/core/net_namespace.c:409 1 lock held by syz-executor.4/26013: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x156/0x440 net/core/net_namespace.c:409 1 lock held by syz-executor.4/26093: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x156/0x440 net/core/net_namespace.c:409 1 lock held by syz-executor.4/26183: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x156/0x440 net/core/net_namespace.c:409 1 lock held by syz-executor.4/26259: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x156/0x440 net/core/net_namespace.c:409 1 lock held by syz-executor.4/26668: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x156/0x440 net/core/net_namespace.c:409 1 lock held by syz-executor.4/26741: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x156/0x440 net/core/net_namespace.c:409 1 lock held by syz-executor.4/26809: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x156/0x440 net/core/net_namespace.c:409 1 lock held by syz-executor.4/26856: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x156/0x440 net/core/net_namespace.c:409 1 lock held by syz-executor.4/26963: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x156/0x440 net/core/net_namespace.c:409 1 lock held by syz-executor.4/27016: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x156/0x440 net/core/net_namespace.c:409 1 lock held by syz-executor.4/27066: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x156/0x440 net/core/net_namespace.c:409 1 lock held by syz-executor.4/27185: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x156/0x440 net/core/net_namespace.c:409 1 lock held by syz-executor.4/28605: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x156/0x440 net/core/net_namespace.c:409 1 lock held by syz-executor.0/32639: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x156/0x440 net/core/net_namespace.c:409 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.108+ #38 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: 25918 Comm: syz-executor.4 Not tainted 4.14.108+ #38 task: ffff88817e391780 task.stack: ffff88815e528000 RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:46 [inline] RIP: 0010:unwind_next_frame+0xc23/0x1800 arch/x86/kernel/unwind_orc.c:474 RSP: 0018:ffff88815e52f430 EFLAGS: 00000212 RAX: ffff88815e530000 RBX: 1ffff1102bca5e8d RCX: 0000000000000001 RDX: ffff88815e52f808 RSI: ffff88815e52f3c8 RDI: ffff88815e52f510 RBP: ffff88815e52f800 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000017a4e R11: 000000000001c033 R12: ffff88815e528000 R13: ffff88815e52f538 R14: ffff88815e52f500 R15: ffff88815e52f800 FS: 00007f04b2b5a700(0000) GS:ffff8881db900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c4290a7000 CR3: 0000000165548002 CR4: 00000000001606a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: Code: 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 ec 0b 00 00 49 39 ec 49 8b 46 10 77 24 48 39 e8 76 1f 48 8d 55 08 49 39 d4 0f 92 c1 48 39 d0 <0f> 93 c0 84 c1 74 0b 48 3b 6c 24 08 0f 86 43 05 00 00 bf 01 00