ip6_tunnel: 6tnl0 xmit: Local address not yet configured!
INFO: task syz-executor4:9472 blocked for more than 140 seconds.
      Not tainted 4.9.135+ #61
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor4   D28248  9472   2112 0x00000004
 ffff880101c2c740 0000000000000000 ffff880101ec3700 ffff8801c42417c0
 ffff8801db721018 ffff880181277ab0 ffffffff827fa982 ffff880181277b48
 ffff880181277df0 ffff880181277a58 00ffffff81b9bbcc ffff8801db7218f0
Call Trace:
 [<ffffffff827fbeaf>] schedule+0x7f/0x1b0 kernel/sched/core.c:3553
 [<ffffffff82807655>] schedule_timeout+0x735/0xe20 kernel/time/timer.c:1771
 [<ffffffff827fd9cf>] do_wait_for_common kernel/sched/completion.c:75 [inline]
 [<ffffffff827fd9cf>] __wait_for_common kernel/sched/completion.c:93 [inline]
 [<ffffffff827fd9cf>] wait_for_common+0x3ef/0x5d0 kernel/sched/completion.c:101
 [<ffffffff827fdbc8>] wait_for_completion+0x18/0x20 kernel/sched/completion.c:122
 [<ffffffff8112c8f4>] flush_work+0x3a4/0x6c0 kernel/workqueue.c:2846
 [<ffffffff8143f148>] lru_add_drain_all+0x2c8/0x400 mm/swap.c:714
 [<ffffffff814a8ae9>] SYSC_mlockall mm/mlock.c:803 [inline]
 [<ffffffff814a8ae9>] SyS_mlockall+0x1e9/0x530 mm/mlock.c:791
 [<ffffffff810056ef>] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285
 [<ffffffff8280ac13>] 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: [<ffffffff8131bb4c>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff8131bb4c>] watchdog+0x11c/0xa20 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff813fe314>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
2 locks held by getty/2022:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff82808cd2>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+...}, at: [<ffffffff81d2b032>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2142
2 locks held by syz-executor3/20007:
 #0:  (rtnl_mutex){+.+.+.}, at: [<ffffffff82334ee7>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:70
 #1:  (cpu_hotplug.dep_map){++++++}, at: [<ffffffff810e1872>] get_online_cpus+0x32/0x90 kernel/cpu.c:253
2 locks held by syz-executor4/24801:
 #0:  (&sb->s_type->i_mutex_key#8){+.+.+.}, at: [<ffffffff8228fb0b>] inode_lock include/linux/fs.h:766 [inline]
 #0:  (&sb->s_type->i_mutex_key#8){+.+.+.}, at: [<ffffffff8228fb0b>] __sock_release+0x8b/0x260 net/socket.c:604
 #1:  (rtnl_mutex){+.+.+.}, at: [<ffffffff82334ee7>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:70
4 locks held by kworker/u4:18/31944:
 #0:  ("%s""netns"){.+.+.+}, at: [<ffffffff81130c6c>] process_one_work+0x73c/0x1530 kernel/workqueue.c:2085
 #1:  (net_cleanup_work){+.+.+.}, at: [<ffffffff81130ca4>] process_one_work+0x774/0x1530 kernel/workqueue.c:2089
 #2:  (net_mutex){+.+.+.}, at: [<ffffffff822da52f>] cleanup_net+0x13f/0x8b0 net/core/net_namespace.c:439
 #3:  (rtnl_mutex){+.+.+.}, at: [<ffffffff82334ee7>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:70
1 lock held by syz-executor5/8917:
 #0:  (&sig->cred_guard_mutex){+.+.+.}, at: [<ffffffff81520d63>] prepare_bprm_creds+0x53/0x110 fs/exec.c:1369
2 locks held by syz-executor4/9472:
 #0:  (lock#2){+.+...}, at: [<ffffffff8143eeca>] lru_add_drain_all+0x4a/0x400 mm/swap.c:695
 #1:  (cpu_hotplug.dep_map){++++++}, at: [<ffffffff810e1872>] get_online_cpus+0x32/0x90 kernel/cpu.c:253
1 lock held by syz-executor4/9506:
 #0:  (lock#2){+.+...}, at: [<ffffffff8143eeca>] lru_add_drain_all+0x4a/0x400 mm/swap.c:695

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

NMI backtrace for cpu 1
CPU: 1 PID: 24 Comm: khungtaskd Not tainted 4.9.135+ #61
 ffff8801d9907d08 ffffffff81b36bf9 0000000000000000 0000000000000001
 0000000000000001 0000000000000001 ffffffff81098330 ffff8801d9907d40
 ffffffff81b41d09 0000000000000001 0000000000000000 0000000000000003
Call Trace:
 [<ffffffff81b36bf9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b36bf9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81b41d09>] nmi_cpu_backtrace.cold.0+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81b41c9c>] nmi_trigger_cpumask_backtrace+0x12c/0x151 lib/nmi_backtrace.c:60
 [<ffffffff81098434>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff8131c0dd>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff8131c0dd>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff8131c0dd>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff8131c0dd>] watchdog+0x6ad/0xa20 kernel/hung_task.c:239
 [<ffffffff811428dd>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff8280addc>] 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: 9460 Comm: syz-executor2 Not tainted 4.9.135+ #61
task: ffff88000ad14740 task.stack: ffff8801873a0000
RIP: 0010:[<ffffffff81005cb2>] 
c [<ffffffff81005cb2>] __read_once_size include/linux/compiler.h:243 [inline]
RIP: 0010:[<ffffffff81005cb2>] 
c [<ffffffff81005cb2>] syscall_return_slowpath arch/x86/entry/common.c:247 [inline]
RIP: 0010:[<ffffffff81005cb2>] 
c [<ffffffff81005cb2>] do_syscall_32_irqs_on arch/x86/entry/common.c:334 [inline]
RIP: 0010:[<ffffffff81005cb2>] 
c [<ffffffff81005cb2>] do_int80_syscall_32+0x212/0x580 arch/x86/entry/common.c:342
RSP: 0000:ffff8801873a7f00  EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffff8801873a7f58 RCX: ffffc90000f22000
RDX: 1ffff100015a28e8 RSI: ffffffff81005c94 RDI: ffff88000ad14748
RBP: ffff8801873a7f48 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88000ad14740
R13: ffff8801873a7fd0 R14: ffff88000ad14740 R15: 0000000000000000
FS:  00007ff0c64a6700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 000000015e901000 CR4: 00000000001606b0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Stack:
 0000000000000000
c 0000000000000000
c 0000000000000000
c 0000000000000000
c
 00000000ffffffda
c 0000000000000000
c 0000000000000000
c 0000000000000000
c
 0000000000000000
c 0000000000000000
c ffffffff8280c2d4
c 00000000ffffffff
c
Call Trace:
 [<ffffffff8280c2d4>] entry_INT80_compat+0x74/0xa0 arch/x86/entry/entry_64_compat.S:371
Code: 
cac 
c02 
c00 
c00 
c48 
c89 
c43 
c50 
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c4c 
c58 
c31 
c00 
c48 
cb8 
c00 
c00 
c00 
c00 
c00 
cfc 
cff 
cdf 
c65 
c4c 
c8b 
c24 
c25 
c00 
c7e 
c01 
c00 
c4c 
c89 
ce2 
c48 
cc1 
cea 
c03 
c80 
c3c 
c02 
c00 
c<0f> 
c85 
c58 
c02 
c00 
c00 
c4d 
c8b 
c24 
c24 
c9c 
c58 
c0f 
c1f 
c44 
c00 
c00 
cf6 
cc4 
c02 
c0f 
c