ip6_tunnel: ip6tnl1 xmit: Local address not yet configured!
INFO: task syz-executor.3:21783 blocked for more than 140 seconds.
      Not tainted 4.9.155+ #27
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D25768 21783      1 0x00000004
 ffff8801cf3baf80 ffff8801d18f7900 ffff8801db621000 ffff8801ced18000
 ffff8801db621018 ffff8801a344f598 ffffffff82806806 0f8340896a5da1d2
 0000000000000001 ffff8801cf3bb830 0000000000000006 ffff8801db6218f0
Call Trace:
 [<ffffffff82807d92>] schedule+0x92/0x1c0 kernel/sched/core.c:3553
 [<ffffffff82808733>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3586
 [<ffffffff8280a68d>] __mutex_lock_common kernel/locking/mutex.c:582 [inline]
 [<ffffffff8280a68d>] mutex_lock_nested+0x38d/0x920 kernel/locking/mutex.c:621
 [<ffffffff818928ad>] fuse_lock_inode+0xad/0xe0 fs/fuse/inode.c:364
 [<ffffffff81873bb9>] fuse_lookup+0x89/0x3b0 fs/fuse/dir.c:406
 [<ffffffff8152c99b>] lookup_slow+0x24b/0x480 fs/namei.c:1709
 [<ffffffff8153bc0e>] walk_component+0x71e/0xce0 fs/namei.c:1825
 [<ffffffff8153ca67>] link_path_walk+0x897/0x1200 fs/namei.c:2161
 [<ffffffff8153d977>] path_mountpoint+0x67/0x6d0 fs/namei.c:2737
 [<ffffffff8154238f>] filename_mountpoint+0x17f/0x350 fs/namei.c:2758
 [<ffffffff81543a8a>] user_path_mountpoint_at+0x3a/0x50 fs/namei.c:2788
 [<ffffffff81579bd6>] SYSC_umount fs/namespace.c:1722 [inline]
 [<ffffffff81579bd6>] SyS_umount+0x136/0xd30 fs/namespace.c:1706
 [<ffffffff810056bd>] do_syscall_64+0x1ad/0x570 arch/x86/entry/common.c:285
 [<ffffffff82816a93>] 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: [<ffffffff8131bbab>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff8131bbab>] watchdog+0x11b/0xa40 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff813fea8f>] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4336
1 lock held by rsyslogd/1910:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff8156f2f8>] __fdget_pos+0xa8/0xd0 fs/file.c:781
2 locks held by getty/2037:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff82814b83>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
 #1:  (&ldata->atomic_read_lock){+.+...}, at: [<ffffffff81d3982e>] n_tty_read+0x1fe/0x1820 drivers/tty/n_tty.c:2156
2 locks held by syz-executor.3/21783:
 #0:  (&type->i_mutex_dir_key#7){++++++}, at: [<ffffffff8152c8b0>] inode_lock_shared include/linux/fs.h:778 [inline]
 #0:  (&type->i_mutex_dir_key#7){++++++}, at: [<ffffffff8152c8b0>] lookup_slow+0x160/0x480 fs/namei.c:1686
 #1:  (&fi->mutex){+.+.+.}, at: [<ffffffff818928ad>] fuse_lock_inode+0xad/0xe0 fs/fuse/inode.c:364
2 locks held by syz-executor.3/22249:
 #0:  (&type->i_mutex_dir_key#7){++++++}, at: [<ffffffff8152c8b0>] inode_lock_shared include/linux/fs.h:778 [inline]
 #0:  (&type->i_mutex_dir_key#7){++++++}, at: [<ffffffff8152c8b0>] lookup_slow+0x160/0x480 fs/namei.c:1686
 #1:  (&fi->mutex){+.+.+.}, at: [<ffffffff818928ad>] fuse_lock_inode+0xad/0xe0 fs/fuse/inode.c:364

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

NMI backtrace for cpu 0
CPU: 0 PID: 24 Comm: khungtaskd Not tainted 4.9.155+ #27
 ffff8801d9907cd0 ffffffff81b47871 0000000000000000 0000000000000000
 0000000000000000 ffffffff81097301 00000000003ffed1 ffff8801d9907d08
 ffffffff81b52afc 0000000000000000 0000000000000000 0000000000000000
Call Trace:
 [<ffffffff81b47871>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b47871>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<ffffffff81b52afc>] nmi_cpu_backtrace.cold+0x47/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81b52a84>] nmi_trigger_cpumask_backtrace+0x124/0x155 lib/nmi_backtrace.c:60
 [<ffffffff81097494>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff8131c087>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff8131c087>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff8131c087>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff8131c087>] watchdog+0x5f7/0xa40 kernel/hung_task.c:239
 [<ffffffff81142028>] kthread+0x278/0x310 kernel/kthread.c:211
 [<ffffffff82816c5c>] 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
CPU: 1 PID: 1907 Comm: rs:main Q:Reg Not tainted 4.9.155+ #27
task: ffff8801d47b97c0 task.stack: ffff8801d3088000
RIP: 0010:[<ffffffff8129ae21>] 
c [<ffffffff8129ae21>] get_futex_key_refs.isra.0+0x1/0xa0 kernel/futex.c:420
RSP: 0018:ffff8801d308f820  EFLAGS: 00000246
RAX: ffff8801d308fab8 RBX: 0000000001cb5264 RCX: 0000000000000000
RDX: 1ffff1003a611f57 RSI: ffff8801d308fac8 RDI: ffff8801d3f13c80
RBP: ffff8801d308f900 R08: ffff8801d308fa60 R09: 0000000000000000
R10: 1ffff1003a611ff9 R11: 0000000000000000 R12: 0000000000000000
R13: ffff8801d308f8d8 R14: ffff8801d47b97c0 R15: dffffc0000000000
FS:  00007fcad97d3700(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c429c47000 CR3: 00000001d4c6a000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Stack:
 ffff8801d308f900
c ffffffff8129b91c
c ffff8801d6c79210
c ffff8801cc69eac0
c
 ffff8801d308fac8
c ffff8801d3f13c80
c 1ffff1003a611f0f
c 0000000000000000
c
 ffff8801d308fab8
c 0000000001cb5000
c ffff8801d308f888
c 0000000041b58ab3
c
Call Trace:
 [<ffffffff8129bf58>] futex_wait_setup+0xd8/0x350 kernel/futex.c:2419
 [<ffffffff8129c3b6>] futex_wait+0x1e6/0x5d0 kernel/futex.c:2482
 [<ffffffff812a05b9>] do_futex+0x159/0x1a70 kernel/futex.c:3270
 [<ffffffff812a2123>] SYSC_futex kernel/futex.c:3330 [inline]
 [<ffffffff812a2123>] SyS_futex+0x253/0x360 kernel/futex.c:3298
 [<ffffffff810056bd>] do_syscall_64+0x1ad/0x570 arch/x86/entry/common.c:285
 [<ffffffff82816a93>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: 
c48 
cc7 
cc7 
c00 
c8d 
ca6 
c82 
cc6 
c05 
ce1 
c5e 
c14 
c02 
c01 
ce8 
c47 
c00 
ce4 
cff 
ceb 
c96 
c48 
c89 
cdf 
ce8 
c2d 
c9e 
c25 
c00 
ce9 
c7a 
cff 
cff 
cff 
c0f 
c1f 
c84 
c00 
c00 
c00 
c00 
c00 
c55 
c<48> 
c89 
ce5 
c41 
c54 
c49 
c89 
cfc 
c53 
c48 
c89 
cf3 
ce8 
cee 
c06 
c08 
c00 
c4d 
c85 
ce4 
c74 
c