ip6_tunnel: q xmit: Local address not yet configured!
INFO: task syz-executor.3:23077 blocked for more than 140 seconds.
      Not tainted 4.14.114+ #63
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D25640 23077      1 0x00000004
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3498
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x559/0x1430 kernel/locking/mutex.c:893
 __lo_release drivers/block/loop.c:1644 [inline]
 lo_release+0x78/0x190 drivers/block/loop.c:1668
 __blkdev_put+0x518/0x6d0 fs/block_dev.c:1791
 blkdev_close+0x86/0xb0 fs/block_dev.c:1863
 __fput+0x25e/0x700 fs/file_table.c:210
 task_work_run+0x118/0x190 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x13b/0x160 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:267 [inline]
 do_syscall_64+0x372/0x4b0 arch/x86/entry/common.c:294
INFO: task syz-executor.1:23083 blocked for more than 140 seconds.
      Not tainted 4.14.114+ #63
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1  D25640 23083      1 0x00000004
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3498
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x559/0x1430 kernel/locking/mutex.c:893
 lo_open+0x19/0xb0 drivers/block/loop.c:1624
 __blkdev_get+0x267/0xf90 fs/block_dev.c:1472
 blkdev_get+0x97/0x8b0 fs/block_dev.c:1612
 blkdev_open+0x1cc/0x250 fs/block_dev.c:1770
 do_dentry_open+0x44e/0xdf0 fs/open.c:770
 vfs_open+0x105/0x230 fs/open.c:884
 do_last fs/namei.c:3455 [inline]
 path_openat+0xb6b/0x2b70 fs/namei.c:3597
 do_filp_open+0x1a1/0x280 fs/namei.c:3631
 do_sys_open+0x2ca/0x590 fs/open.c:1077
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
INFO: task syz-executor.5:1106 blocked for more than 140 seconds.
      Not tainted 4.14.114+ #63
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5  D28040  1106   1873 0x80000002
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3498
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x559/0x1430 kernel/locking/mutex.c:893
 lo_release+0x19/0x190 drivers/block/loop.c:1667
 __blkdev_put+0x518/0x6d0 fs/block_dev.c:1791
 blkdev_close+0x86/0xb0 fs/block_dev.c:1863
 __fput+0x25e/0x700 fs/file_table.c:210
 task_work_run+0x118/0x190 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0x903/0x2960 kernel/exit.c:874
INFO: task syz-executor.5:32497 blocked for more than 140 seconds.
      Not tainted 4.14.114+ #63
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5  D26992 32497   1873 0x00000004
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3498
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x559/0x1430 kernel/locking/mutex.c:893
 blkdev_reread_part+0x1b/0x40 block/ioctl.c:192
 loop_reread_partitions+0x72/0x80 drivers/block/loop.c:615
 loop_clr_fd+0x828/0xac0 drivers/block/loop.c:1069
 lo_ioctl+0x813/0x1970 drivers/block/loop.c:1415
 __blkdev_driver_ioctl block/ioctl.c:297 [inline]
 blkdev_ioctl+0x4d9/0x1810 block/ioctl.c:594
 block_ioctl+0xd9/0x120 fs/block_dev.c:1881
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0xabe/0x1040 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
INFO: task blkid:32501 blocked for more than 140 seconds.
      Not tainted 4.14.114+ #63
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
blkid           D28688 32501   3988 0x00000004
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3498
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x559/0x1430 kernel/locking/mutex.c:893
 lo_open+0x19/0xb0 drivers/block/loop.c:1624
 __blkdev_get+0x963/0xf90 fs/block_dev.c:1537
 blkdev_get+0x97/0x8b0 fs/block_dev.c:1612
 blkdev_open+0x1cc/0x250 fs/block_dev.c:1770
 do_dentry_open+0x44e/0xdf0 fs/open.c:770
 vfs_open+0x105/0x230 fs/open.c:884
 do_last fs/namei.c:3455 [inline]
 path_openat+0xb6b/0x2b70 fs/namei.c:3597
 do_filp_open+0x1a1/0x280 fs/namei.c:3631
 do_sys_open+0x2ca/0x590 fs/open.c:1077
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
INFO: task blkid:32502 blocked for more than 140 seconds.
      Not tainted 4.14.114+ #63
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
blkid           D27816 32502  31329 0x00000004
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3498
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x559/0x1430 kernel/locking/mutex.c:893
 __blkdev_get+0xf3/0xf90 fs/block_dev.c:1457
 blkdev_get+0x97/0x8b0 fs/block_dev.c:1612
 blkdev_open+0x1cc/0x250 fs/block_dev.c:1770
 do_dentry_open+0x44e/0xdf0 fs/open.c:770
 vfs_open+0x105/0x230 fs/open.c:884
 do_last fs/namei.c:3455 [inline]
 path_openat+0xb6b/0x2b70 fs/namei.c:3597
 do_filp_open+0x1a1/0x280 fs/namei.c:3631
 do_sys_open+0x2ca/0x590 fs/open.c:1077
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289

Showing all locks held in the system:
1 lock held by khungtaskd/23:
 #0:  (tasklist_lock){.+.+}, at: [<0000000039822981>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4541
2 locks held by getty/1782:
 #0:  (&tty->ldisc_sem){++++}, at: [<00000000e4068a4b>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<0000000060cb36b5>] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156
3 locks held by syz-executor.3/23077:
 #0:  (&bdev->bd_mutex){+.+.}, at: [<00000000f5a7b243>] __blkdev_put+0xb1/0x6d0 fs/block_dev.c:1778
 #1:  (loop_index_mutex){+.+.}, at: [<000000007ef7d9e1>] lo_release+0x19/0x190 drivers/block/loop.c:1667
 #2:  (loop_ctl_mutex#2){+.+.}, at: [<0000000034f5385c>] __lo_release drivers/block/loop.c:1644 [inline]
 #2:  (loop_ctl_mutex#2){+.+.}, at: [<0000000034f5385c>] lo_release+0x78/0x190 drivers/block/loop.c:1668
2 locks held by syz-executor.1/23083:
 #0:  (&bdev->bd_mutex){+.+.}, at: [<00000000112de844>] __blkdev_get+0xf3/0xf90 fs/block_dev.c:1457
 #1:  (loop_index_mutex){+.+.}, at: [<00000000b990ccad>] lo_open+0x19/0xb0 drivers/block/loop.c:1624
2 locks held by syz-executor.5/1106:
 #0:  (&bdev->bd_mutex){+.+.}, at: [<00000000f5a7b243>] __blkdev_put+0xb1/0x6d0 fs/block_dev.c:1778
 #1:  (loop_index_mutex){+.+.}, at: [<000000007ef7d9e1>] lo_release+0x19/0x190 drivers/block/loop.c:1667
2 locks held by syz-executor.5/32497:
 #0:  (loop_ctl_mutex/1){+.+.}, at: [<00000000d17f8d45>] lo_ioctl+0x83/0x1970 drivers/block/loop.c:1405
 #1:  (&bdev->bd_mutex){+.+.}, at: [<00000000437bfba6>] blkdev_reread_part+0x1b/0x40 block/ioctl.c:192
2 locks held by blkid/32501:
 #0:  (&bdev->bd_mutex){+.+.}, at: [<00000000112de844>] __blkdev_get+0xf3/0xf90 fs/block_dev.c:1457
 #1:  (loop_index_mutex){+.+.}, at: [<00000000b990ccad>] lo_open+0x19/0xb0 drivers/block/loop.c:1624
1 lock held by blkid/32502:
 #0:  (&bdev->bd_mutex){+.+.}, at: [<00000000112de844>] __blkdev_get+0xf3/0xf90 fs/block_dev.c:1457

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

NMI backtrace for cpu 1
CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.114+ #63
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xb9/0x10e lib/dump_stack.c:53
 nmi_cpu_backtrace.cold+0x47/0x86 lib/nmi_backtrace.c:101
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 12981 Comm: syz-executor.3 Not tainted 4.14.114+ #63
task: 00000000a34af500 task.stack: 00000000b42c1deb
RIP: 0010:check_preemption_disabled+0x2/0x1f0 lib/smp_processor_id.c:13
RSP: 0018:ffff88817607fc58 EFLAGS: 00000097
RAX: ffff8881d491de00 RBX: ffff8881a1945d80 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff9c2376e0 RDI: ffffffff9c350640
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88817607fd38
R13: 0000000000000014 R14: ffff88817607fdc0 R15: ffff8881d491de00
FS:  00007f0fff983700(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000014 CR3: 0000000176534002 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 kprobe_running include/linux/kprobes.h:375 [inline]
 kprobes_fault arch/x86/mm/fault.c:52 [inline]
 __do_page_fault+0x550/0xb80 arch/x86/mm/fault.c:1295
 page_fault+0x22/0x50 arch/x86/entry/entry_64.S:1104
RIP: 0010:do_strncpy_from_user lib/strncpy_from_user.c:61 [inline]
RIP: 0010:strncpy_from_user+0x179/0x230 lib/strncpy_from_user.c:118
RSP: 0018:ffff88817607fde8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000000000002e
RDX: 0000000000000000 RSI: 0000000000000020 RDI: ffff8881d491de18
RBP: 0000000000000020 R08: 0000000000000005 R09: ffffed102ec0ffd2
R10: ffffed102ec0ffd1 R11: ffff88817607fe8f R12: 0000000000000014
R13: ffff88817607fe70 R14: 0000000000000000 R15: dffffc0000000000
 key_get_type_from_user.constprop.0+0x1f/0xd0 security/keys/keyctl.c:40
 SYSC_request_key security/keys/keyctl.c:172 [inline]
 SyS_request_key+0x80/0x2d0 security/keys/keyctl.c:159
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
Code: 89 e7 e8 52 a4 99 ff e9 17 f3 ff ff e8 e8 a3 99 ff e9 eb f2 ff ff e8 3e 0c 54 ff 48 8b 3c 24 e8 b5 a3 99 ff e9 c6 f7 ff ff 41 57 <41> 56 41 55 49 89 f5 41 54 55 48 89 fd 53 e8 db 59 77 ff 65 44