ip6_tunnel: ip6tnl121 xmit: Local address not yet configured!
ip6_tunnel: ip6tnl162 xmit: Local address not yet configured!
ip6_tunnel: ip6tnl173 xmit: Local address not yet configured!
ip6_tunnel: ip6tnl200 xmit: Local address not yet configured!
INFO: task init:7868 blocked for more than 140 seconds.
      Not tainted 4.9.141+ #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
init            D29336  7868      1 0x00000000
 ffff8801ca21df00 ffff8801cab94780 ffff8801d49dc200 ffff8801a373df00
 ffff8801db621018 ffff8801c58b7738 ffffffff828075c2 0000000000000000
 ffff8801ca21e7b0 ffffed0039443cf5 00ff8801ca21df00 ffff8801db6218f0
Call Trace:
 [<ffffffff82808aef>] schedule+0x7f/0x1b0 kernel/sched/core.c:3553
 [<ffffffff828094a3>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3586
 [<ffffffff8280b51d>] __mutex_lock_common kernel/locking/mutex.c:582 [inline]
 [<ffffffff8280b51d>] mutex_lock_nested+0x38d/0x900 kernel/locking/mutex.c:621
 [<ffffffff81d2bb96>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 [<ffffffff81d2bb96>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130
 [<ffffffff81517bdd>] chrdev_open+0x22d/0x5c0 fs/char_dev.c:392
 [<ffffffff81501e3f>] do_dentry_open+0x3ef/0xc90 fs/open.c:766
 [<ffffffff8150576c>] vfs_open+0x11c/0x210 fs/open.c:879
 [<ffffffff8153c542>] do_last fs/namei.c:3410 [inline]
 [<ffffffff8153c542>] path_openat+0x542/0x2790 fs/namei.c:3534
 [<ffffffff81541617>] do_filp_open+0x197/0x270 fs/namei.c:3568
 [<ffffffff8150617d>] do_sys_open+0x30d/0x5c0 fs/open.c:1072
 [<ffffffff8150645d>] SYSC_open fs/open.c:1090 [inline]
 [<ffffffff8150645d>] SyS_open+0x2d/0x40 fs/open.c:1085
 [<ffffffff810056ef>] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285
 [<ffffffff82817893>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb

Showing all locks held in the system:
2 locks held by khungtaskd/24:
 #0:  (rcu_read_lock){......}, at: [<ffffffff8131c0cc>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff8131c0cc>] watchdog+0x11c/0xa20 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff813fe63f>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
1 lock held by rsyslogd/1893:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff8156cc7c>] __fdget_pos+0xac/0xd0 fs/file.c:781
2 locks held by getty/2020:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff82815952>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+...}, at: [<ffffffff81d37362>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2142
2 locks held by kworker/u4:3/2084:
 #0:  ("events_unbound"){.+.+.+}, at: [<ffffffff81130f0c>] process_one_work+0x73c/0x15f0 kernel/workqueue.c:2085
 #1:  ((&sub_info->work)){+.+.+.}, at: [<ffffffff81130f44>] process_one_work+0x774/0x15f0 kernel/workqueue.c:2089
1 lock held by init/7868:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130
1 lock held by init/7869:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130
1 lock held by init/7874:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130
1 lock held by init/8520:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130
1 lock held by init/24817:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130
1 lock held by syz-executor.1/25525:
 #0:  (rtnl_mutex){+.+.+.}, at: [<ffffffff8234abeb>] rtnl_lock net/core/rtnetlink.c:70 [inline]
 #0:  (rtnl_mutex){+.+.+.}, at: [<ffffffff8234abeb>] rtnetlink_rcv+0x1b/0x40 net/core/rtnetlink.c:4083
1 lock held by syz-executor.1/25552:
 #0:  (rtnl_mutex){+.+.+.}, at: [<ffffffff8234abeb>] rtnl_lock net/core/rtnetlink.c:70 [inline]
 #0:  (rtnl_mutex){+.+.+.}, at: [<ffffffff8234abeb>] rtnetlink_rcv+0x1b/0x40 net/core/rtnetlink.c:4083
1 lock held by syz-executor.5/25509:
 #0:  (rtnl_mutex){+.+.+.}, at: [<ffffffff8234abeb>] rtnl_lock net/core/rtnetlink.c:70 [inline]
 #0:  (rtnl_mutex){+.+.+.}, at: [<ffffffff8234abeb>] rtnetlink_rcv+0x1b/0x40 net/core/rtnetlink.c:4083
1 lock held by syz-executor.5/25559:
 #0:  (rtnl_mutex){+.+.+.}, at: [<ffffffff8234abeb>] rtnl_lock net/core/rtnetlink.c:70 [inline]
 #0:  (rtnl_mutex){+.+.+.}, at: [<ffffffff8234abeb>] rtnetlink_rcv+0x1b/0x40 net/core/rtnetlink.c:4083
1 lock held by syz-executor.3/25529:
 #0:  (rtnl_mutex){+.+.+.}, at: [<ffffffff8234abeb>] rtnl_lock net/core/rtnetlink.c:70 [inline]
 #0:  (rtnl_mutex){+.+.+.}, at: [<ffffffff8234abeb>] rtnetlink_rcv+0x1b/0x40 net/core/rtnetlink.c:4083
1 lock held by syz-executor.3/25562:
 #0:  (rtnl_mutex){+.+.+.}, at: [<ffffffff823412d7>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:70
1 lock held by syz-executor.2/25557:
 #0:  (rtnl_mutex){+.+.+.}, at: [<ffffffff823412d7>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:70
1 lock held by syz-executor.2/25568:
 #0:  (rtnl_mutex){+.+.+.}, at: [<ffffffff823412d7>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:70
1 lock held by syz-executor.0/25571:
 #0:  (rtnl_mutex){+.+.+.}, at: [<ffffffff823412d7>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:70

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 24 Comm: khungtaskd Not tainted 4.9.141+ #1
 ffff8801d9907d08 ffffffff81b42e79 0000000000000000 0000000000000001
 0000000000000001 0000000000000001 ffffffff810983b0 ffff8801d9907d40
 ffffffff81b4df89 0000000000000001 0000000000000000 0000000000000002
Call Trace:
 [<ffffffff81b42e79>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b42e79>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81b4df89>] nmi_cpu_backtrace.cold.0+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81b4df1c>] nmi_trigger_cpumask_backtrace+0x12c/0x151 lib/nmi_backtrace.c:60
 [<ffffffff810984b4>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff8131c65d>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff8131c65d>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff8131c65d>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff8131c65d>] watchdog+0x6ad/0xa20 kernel/hung_task.c:239
 [<ffffffff81142c3d>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff82817a5c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2073 Comm: syz-executor.4 Not tainted 4.9.141+ #1
task: ffff8801d08caf80 task.stack: ffff8801ad8d0000
RIP: 0010:[<ffffffff82816db4>] 
c [<ffffffff82816db4>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline]
RIP: 0010:[<ffffffff82816db4>] 
c [<ffffffff82816db4>] _raw_spin_lock_irqsave+0x24/0x70 kernel/locking/spinlock.c:159
RSP: 0018:ffff8801ad8d76f0  EFLAGS: 00000046
RAX: 0000000000000007 RBX: ffffffff84251b48 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8801d08cb7f4
RBP: ffff8801ad8d7708 R08: ffff8801d08cb830 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000286
R13: ffffffff84251b48 R14: 0000000000007603 R15: dffffc0000000000
FS:  0000000000c6b940(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0f0b0b91c4 CR3: 00000001ad8a2000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff82816fa5
c 000000000000c9c0
c 000000000004000c
c ffff8801ad8d7800
c
 ffffffff81baaa24
c ffff8801cc8abc88
c ffff8801db621c80
c ffffffff84251b40
c
 ffff880007604000
c ffff880007604000
c ffffffff83c8d790
c ffff8801cc8abc88
c
Call Trace:
 [<ffffffff81baaa24>] __debug_check_no_obj_freed lib/debugobjects.c:711 [inline]
 [<ffffffff81baaa24>] debug_check_no_obj_freed+0x164/0x890 lib/debugobjects.c:749
 [<ffffffff81424481>] free_pages_prepare mm/page_alloc.c:1073 [inline]
 [<ffffffff81424481>] free_pcp_prepare mm/page_alloc.c:1087 [inline]
 [<ffffffff81424481>] free_hot_cold_page+0x1d1/0x9d0 mm/page_alloc.c:2473
 [<ffffffff814250a9>] free_hot_cold_page_list+0x99/0x340 mm/page_alloc.c:2521
 [<ffffffff8143c2eb>] release_pages+0x6bb/0xaa0 mm/swap.c:794
 [<ffffffff8143eedd>] __pagevec_release+0x5d/0xb0 mm/swap.c:811
 [<ffffffff814632fa>] pagevec_release include/linux/pagevec.h:77 [inline]
 [<ffffffff814632fa>] shmem_undo_range+0x6aa/0x1180 mm/shmem.c:832
 [<ffffffff81463df7>] shmem_truncate_range+0x27/0xa0 mm/shmem.c:954
 [<ffffffff814640fe>] shmem_evict_inode+0x28e/0x7a0 mm/shmem.c:1049
 [<ffffffff81562719>] evict+0x2d9/0x620 fs/inode.c:553
 [<ffffffff81563a01>] iput_final fs/inode.c:1516 [inline]
 [<ffffffff81563a01>] iput+0x371/0x900 fs/inode.c:1543
 [<ffffffff81540b35>] do_unlinkat+0x4d5/0x660 fs/namei.c:4087
 [<ffffffff8154218a>] SYSC_unlink fs/namei.c:4128 [inline]
 [<ffffffff8154218a>] SyS_unlink+0x1a/0x20 fs/namei.c:4126
 [<ffffffff810056ef>] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285
 [<ffffffff82817893>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: 
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c