ip6_tunnel: ip6tnl1 xmit: Local address not yet configured!
ip6_tunnel: € xmit: Local address not yet configured!
INFO: task syz-executor3:12646 blocked for more than 140 seconds.
      Not tainted 4.9.132+ #51
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor3   D28824 12646   2119 0x00000004
 ffff8801a05ddf00 ffff8801a130a100 ffff880186c6b180 ffff8801c975df00
 ffff8801db621018 ffff8801938b7c50 ffffffff827f36e2 ffff8801938b7c28
 ffffffff81206c17 0000000000000000 00ff8801a05de7a8 ffff8801db6218f0
Call Trace:
 [<ffffffff827f4c0f>] schedule+0x7f/0x1b0 kernel/sched/core.c:3553
 [<ffffffff827ff96c>] rwsem_down_read_failed+0x26c/0x400 kernel/locking/rwsem-xadd.c:260
 [<ffffffff81b69708>] call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
 [<ffffffff827fd742>] __down_read arch/x86/include/asm/rwsem.h:65 [inline]
 [<ffffffff827fd742>] down_read+0x52/0xb0 kernel/locking/rwsem.c:24
 [<ffffffff810b302b>] __do_page_fault+0x7db/0xa60 arch/x86/mm/fault.c:1342
 [<ffffffff810b3307>] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1469
 [<ffffffff82804975>] page_fault+0x25/0x30 arch/x86/entry/entry_64.S:951

Showing all locks held in the system:
2 locks held by khungtaskd/24:
 #0:  (rcu_read_lock){......}, at: [<ffffffff8131bc8c>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff8131bc8c>] watchdog+0x11c/0xa20 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.?..}, at: [<ffffffff813fe454>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
2 locks held by getty/2031:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff82801a32>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+...}, at: [<ffffffff81d2b442>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2142
1 lock held by syz-executor3/12646:
 #0:  (&mm->mmap_sem){++++++}, at: [<ffffffff810b302b>] __do_page_fault+0x7db/0xa60 arch/x86/mm/fault.c:1342
1 lock held by syz-executor3/12647:
 #0:  (&mm->mmap_sem){++++++}, at: [<ffffffff810e6841>] exit_mm kernel/exit.c:480 [inline]
 #0:  (&mm->mmap_sem){++++++}, at: [<ffffffff810e6841>] do_exit+0x3c1/0x29d0 kernel/exit.c:820

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

NMI backtrace for cpu 0
CPU: 0 PID: 24 Comm: khungtaskd Not tainted 4.9.132+ #51
 ffff8801d9907d08 ffffffff81b371b9 0000000000000000 0000000000000000
 0000000000000000 0000000000000001 ffffffff810984f0 ffff8801d9907d40
 ffffffff81b422c9 0000000000000000 0000000000000000 0000000000000003
Call Trace:
 [<ffffffff81b371b9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b371b9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81b422c9>] nmi_cpu_backtrace.cold.0+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81b4225c>] nmi_trigger_cpumask_backtrace+0x12c/0x151 lib/nmi_backtrace.c:60
 [<ffffffff810985f4>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff8131c21d>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff8131c21d>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff8131c21d>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff8131c21d>] watchdog+0x6ad/0xa20 kernel/hung_task.c:239
 [<ffffffff81142a9d>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff82803b1c>] 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: 12649 Comm: syz-executor3 Not tainted 4.9.132+ #51
task: ffff8801d32e4740 task.stack: ffff8801cc7a0000
RIP: 0010:[<ffffffff811fe572>] 
c [<ffffffff811fe572>] __write_once_size include/linux/compiler.h:272 [inline]
RIP: 0010:[<ffffffff811fe572>] 
c [<ffffffff811fe572>] mutex_clear_owner kernel/locking/mutex-debug.h:37 [inline]
RIP: 0010:[<ffffffff811fe572>] 
c [<ffffffff811fe572>] debug_mutex_unlock+0x132/0x520 kernel/locking/mutex-debug.c:89
RSP: 0018:ffff8801cc7a7b58  EFLAGS: 00000086
RAX: dffffc0000000000 RBX: ffff8801cc67cf60 RCX: 0000000000000001
RDX: ffff8801cc67cfb0 RSI: 0000000000000001 RDI: ffff8801cc67cfa8
RBP: ffff8801cc7a7b78 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff841eb840
R13: ffff8801cc67cfb0 R14: 0000000000000246 R15: ffff8801cc7a7bb0
FS:  00007fbfa7e70700(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001172308 CR3: 00000001d80e1000 CR4: 00000000001606b0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Stack:
 ffff8801cc67cf60
c ffff8801cc67cfa0
c 1ffff100398f4f72
c 0000000000000246
c
 ffff8801cc7a7c18
c ffffffff827fc2b8
c ffff8801cc67cf68
c 0000000041b58ab3
c
 ffffffff82e2ba20
c ffffffff827fc150
c dffffc0000000000
c 0000000000000001
c
Call Trace:
 [<ffffffff827fc2b8>] __mutex_unlock_common_slowpath kernel/locking/mutex.c:741 [inline]
 [<ffffffff827fc2b8>] __mutex_unlock_slowpath+0x168/0x3c0 kernel/locking/mutex.c:765
 [<ffffffff827fc519>] mutex_unlock+0x9/0x10 kernel/locking/mutex.c:437
 [<ffffffff813d99ea>] perf_mmap+0x64a/0x1430 kernel/events/core.c:5278
 [<ffffffff814b42bc>] mmap_region+0x80c/0xf90 mm/mmap.c:1726
 [<ffffffff814b4f7d>] do_mmap+0x53d/0xbb0 mm/mmap.c:1505
 [<ffffffff81469f88>] do_mmap_pgoff include/linux/mm.h:2032 [inline]
 [<ffffffff81469f88>] vm_mmap_pgoff+0x168/0x1b0 mm/util.c:329
 [<ffffffff814af62e>] SYSC_mmap_pgoff mm/mmap.c:1555 [inline]
 [<ffffffff814af62e>] SyS_mmap_pgoff+0xfe/0x1b0 mm/mmap.c:1513
 [<ffffffff8105d356>] SYSC_mmap arch/x86/kernel/sys_x86_64.c:96 [inline]
 [<ffffffff8105d356>] SyS_mmap+0x16/0x20 arch/x86/kernel/sys_x86_64.c:87
 [<ffffffff810056ef>] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285
 [<ffffffff82803953>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: 
cff 
cdf 
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c01 
c00 
c00 
c48 
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c00 
c00 
c00 
c00 
c00 
cfc 
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cdf 
c4c 
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cea 
c<48> 
cc1 
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c03 
c80 
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c02 
c00 
c0f 
c85 
c51 
c03 
c00 
c00 
c48 
c89 
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c48 
cc7 
c43 
c50 
c