ip6_tunnel:  xmit: Local address not yet configured!
ip6_tunnel: ip6tnl1 xmit: Local address not yet configured!
INFO: task syz-executor.0:2126 blocked for more than 140 seconds.
      Not tainted 4.9.170+ #48
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0  D25016  2126      1 0x00000004
 ffff8801d18d2f80 ffff8801a3cb4780 ffff8801db621000 ffff8801b1f6df00
 ffff8801db621018 ffff8801a83afa28 ffffffff82801a4e 0000000041b58ab3
 ffffffff82e2b9f0 00ffffff81200360 ffff8801db6218f0 1ffff10035075f34
Call Trace:
 [<00000000e1ae9a02>] schedule+0x92/0x1c0 kernel/sched/core.c:3546
 [<0000000022c73c5c>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3579
 [<000000004dc39f40>] __mutex_lock_common kernel/locking/mutex.c:582 [inline]
 [<000000004dc39f40>] mutex_lock_nested+0x38d/0x920 kernel/locking/mutex.c:621
 [<0000000061979ae8>] lo_ioctl+0x85/0x1a10 drivers/block/loop.c:1405
 [<00000000c4092311>] __blkdev_driver_ioctl block/ioctl.c:294 [inline]
 [<00000000c4092311>] blkdev_ioctl+0xe14/0x19e0 block/ioctl.c:590
 [<000000005d95a22e>] block_ioctl+0xde/0x120 fs/block_dev.c:1696
 [<00000000a2ada8b9>] vfs_ioctl fs/ioctl.c:43 [inline]
 [<00000000a2ada8b9>] file_ioctl fs/ioctl.c:493 [inline]
 [<00000000a2ada8b9>] do_vfs_ioctl+0xb87/0x11d0 fs/ioctl.c:677
 [<0000000058dc3f66>] SYSC_ioctl fs/ioctl.c:694 [inline]
 [<0000000058dc3f66>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685
 [<00000000f71fa8ed>] do_syscall_64+0x1ad/0x570 arch/x86/entry/common.c:285
 [<00000000a1ce5dd1>] 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: [<00000000fe5fbc6d>] check_hung_uninterruptible_tasks kernel/hung_task.c:169 [inline]
 #0:  (rcu_read_lock){......}, at: [<00000000fe5fbc6d>] watchdog+0x14b/0xaf0 kernel/hung_task.c:263
 #1:  (tasklist_lock){.+.+..}, at: [<0000000065d74740>] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4339
2 locks held by getty/2030:
 #0:  (&tty->ldisc_sem){++++++}, at: [<000000001892ab8c>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
 #1:  (&ldata->atomic_read_lock){+.+.+.}, at: [<00000000cde63283>] n_tty_read+0x1fe/0x1820 drivers/tty/n_tty.c:2156
1 lock held by syz-executor.0/2126:
 #0:  (loop_ctl_mutex/1){+.+.+.}, at: [<0000000061979ae8>] lo_ioctl+0x85/0x1a10 drivers/block/loop.c:1405
3 locks held by syz-executor.3/3580:
 #0:  (&bdev->bd_mutex){+.+.+.}, at: [<000000008ca58bc9>] __blkdev_put+0xbb/0x840 fs/block_dev.c:1587
 #1:  (loop_index_mutex){+.+.+.}, at: [<0000000025bb618c>] lo_release+0x1e/0x1b0 drivers/block/loop.c:1664
 #2:  (loop_ctl_mutex#2){+.+.+.}, at: [<000000001e696a47>] __lo_release drivers/block/loop.c:1642 [inline]
 #2:  (loop_ctl_mutex#2){+.+.+.}, at: [<000000001e696a47>] lo_release+0x84/0x1b0 drivers/block/loop.c:1665
2 locks held by syz-executor.1/27535:
 #0:  (&bdev->bd_mutex){+.+.+.}, at: [<0000000085216b3d>] __blkdev_get+0x10e/0xeb0 fs/block_dev.c:1273
 #1:  (loop_index_mutex){+.+.+.}, at: [<00000000a57b0678>] lo_open+0x1d/0xb0 drivers/block/loop.c:1622
2 locks held by syz-executor.4/6989:
 #0:  (loop_ctl_mutex/1){+.+.+.}, at: [<0000000061979ae8>] lo_ioctl+0x85/0x1a10 drivers/block/loop.c:1405
 #1:  (&bdev->bd_mutex){+.+.+.}, at: [<000000004d582d58>] blkdev_reread_part+0x1f/0x40 block/ioctl.c:189
2 locks held by blkid/6998:
 #0:  (&bdev->bd_mutex){+.+.+.}, at: [<0000000085216b3d>] __blkdev_get+0x10e/0xeb0 fs/block_dev.c:1273
 #1:  (loop_index_mutex){+.+.+.}, at: [<00000000a57b0678>] lo_open+0x1d/0xb0 drivers/block/loop.c:1622

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

NMI backtrace for cpu 0
CPU: 0 PID: 24 Comm: khungtaskd Not tainted 4.9.170+ #48
 ffff8801d98d7cc8 ffffffff81b4fb21 0000000000000000 0000000000000000
 0000000000000000 ffffffff81097401 dffffc0000000000 ffff8801d98d7d00
 ffffffff81b5adbc 0000000000000000 0000000000000000 0000000000000000
Call Trace:
 [<00000000277ec337>] __dump_stack lib/dump_stack.c:15 [inline]
 [<00000000277ec337>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<000000004e72f0c7>] nmi_cpu_backtrace.cold+0x47/0x87 lib/nmi_backtrace.c:99
 [<000000001c42aa01>] nmi_trigger_cpumask_backtrace+0x124/0x155 lib/nmi_backtrace.c:60
 [<00000000e0fe233e>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<0000000031af7be6>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<0000000031af7be6>] check_hung_task kernel/hung_task.c:126 [inline]
 [<0000000031af7be6>] check_hung_uninterruptible_tasks kernel/hung_task.c:183 [inline]
 [<0000000031af7be6>] watchdog+0x670/0xaf0 kernel/hung_task.c:263
 [<000000008b5a5e67>] kthread+0x278/0x310 kernel/kthread.c:211
 [<000000005d9c80d6>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at pc 0xffffffff82810ac2