ip6_tunnel: ip6tnl2 xmit: Local address not yet configured!
ip6_tunnel: ip6tnl1 xmit: Local address not yet configured!
ip6_tunnel: ip6tnl3 xmit: Local address not yet configured!
ip6_tunnel: ip6tnl2 xmit: Local address not yet configured!
ip6_tunnel: ip6tnl3 xmit: Local address not yet configured!
INFO: task syz-executor2:31692 blocked for more than 140 seconds.
      Not tainted 4.14.87+ #21
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor2   D26648 31692   1844 0x10000004
Call Trace:
 schedule+0x7f/0x1b0 kernel/sched/core.c:3490
 schedule_timeout+0x710/0xe60 kernel/time/timer.c:1721
 do_wait_for_common kernel/sched/completion.c:91 [inline]
 __wait_for_common kernel/sched/completion.c:112 [inline]
 wait_for_common+0x3bc/0x4e0 kernel/sched/completion.c:123
 flush_work+0x3b8/0x6e0 kernel/workqueue.c:2885
 drain_all_pages+0x38f/0x550 mm/page_alloc.c:2548
 __alloc_pages_direct_reclaim mm/page_alloc.c:3628 [inline]
 __alloc_pages_slowpath mm/page_alloc.c:4011 [inline]
 __alloc_pages_nodemask+0xbe5/0x2280 mm/page_alloc.c:4220
 __alloc_pages include/linux/gfp.h:461 [inline]
 __alloc_pages_node include/linux/gfp.h:474 [inline]
 alloc_pages_node include/linux/gfp.h:488 [inline]
 __page_cache_alloc include/linux/pagemap.h:226 [inline]
 __do_page_cache_readahead+0x249/0x950 mm/readahead.c:183
 ra_submit mm/internal.h:66 [inline]
 ondemand_readahead+0x49c/0xb30 mm/readahead.c:486
 page_cache_async_readahead+0x23f/0x3d0 mm/readahead.c:562
 do_async_mmap_readahead mm/filemap.c:2366 [inline]
 filemap_fault+0xe8f/0x14a0 mm/filemap.c:2418
 ext4_filemap_fault+0x7d/0xb0 fs/ext4/inode.c:6179
 __do_fault+0x80/0x210 mm/memory.c:3194
 do_read_fault mm/memory.c:3604 [inline]
 do_fault mm/memory.c:3730 [inline]
 handle_pte_fault mm/memory.c:3960 [inline]
 __handle_mm_fault+0x991/0x25f0 mm/memory.c:4084
 handle_mm_fault+0x3d5/0x6eb mm/memory.c:4121
 faultin_page mm/gup.c:502 [inline]
 __get_user_pages+0x35d/0xe20 mm/gup.c:702
 populate_vma_page_range+0x17a/0x210 mm/gup.c:1219
 __mm_populate+0x1bf/0x300 mm/gup.c:1267
 mm_populate include/linux/mm.h:2176 [inline]
 SYSC_mlockall mm/mlock.c:816 [inline]
 SyS_mlockall+0x3e2/0x510 mm/mlock.c:790
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x457679
RSP: 002b:00007fec97f3ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000097
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000457679
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fec97f3f6d4
R13: 00000000004c2d55 R14: 00000000004d5080 R15: 00000000ffffffff

Showing all locks held in the system:
1 lock held by khungtaskd/23:
 #0:  (tasklist_lock){.+.?}, at: [<ffffffffb6e04947>] debug_show_all_locks+0x74/0x20f kernel/locking/lockdep.c:4541
2 locks held by getty/1754:
 #0:  (&tty->ldisc_sem){++++}, at: [<ffffffffb79409b0>] tty_ldisc_ref_wait+0x20/0x80 drivers/tty/tty_ldisc.c:275
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffffb793be0f>] n_tty_read+0x1ff/0x1700 drivers/tty/n_tty.c:2156
2 locks held by syz-executor4/20509:
 #0:  (&tty->ldisc_sem){++++}, at: [<ffffffffb79409b0>] tty_ldisc_ref_wait+0x20/0x80 drivers/tty/tty_ldisc.c:275
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffffb793be0f>] n_tty_read+0x1ff/0x1700 drivers/tty/n_tty.c:2156
3 locks held by syz-executor2/31692:
 #0:  (&mm->mmap_sem){++++}, at: [<ffffffffb70c4dd6>] __mm_populate+0x206/0x300 mm/gup.c:1247
 #1:  (&ei->i_mmap_sem){++++}, at: [<ffffffffb7364b85>] ext4_filemap_fault+0x75/0xb0 fs/ext4/inode.c:6178
 #2:  (pcpu_drain_mutex){+.+.}, at: [<ffffffffb70442aa>] drain_all_pages+0x4a/0x550 mm/page_alloc.c:2505

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

NMI backtrace for cpu 1
CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.87+ #21
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xb9/0x11b lib/dump_stack.c:53
 nmi_cpu_backtrace.cold.0+0x47/0x85 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x121/0x146 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:196 [inline]
 watchdog+0x574/0xa70 kernel/hung_task.c:252
 kthread+0x348/0x420 kernel/kthread.c:232
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 31706 Comm: syz-executor5 Not tainted 4.14.87+ #21
task: ffff8881cc138000 task.stack: ffff8881d8d28000
RIP: 0033:0x401674
RSP: 002b:00007f02ab8a0690 EFLAGS: 00000282
RAX: 00000000d3568958 RBX: 000000000000000b RCX: 0000000000457679
RDX: 0000000000000000 RSI: 00007f02ab8a06c0 RDI: 000000000000000b
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f02ab8a1700(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f02ab85edb8 CR3: 00000001cacfc005 CR4: 00000000001606b0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600