INFO: task syz-executor.0:1847 blocked for more than 140 seconds.
      Not tainted 4.14.146+ #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0  D24768  1847      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+0x595/0x13e0 kernel/locking/mutex.c:893
 blkdev_reread_part+0x1b/0x40 block/ioctl.c:192
 loop_reread_partitions+0x7f/0x90 drivers/block/loop.c:614
 loop_clr_fd+0x835/0xad0 drivers/block/loop.c:1068
 lo_ioctl+0x460/0x1a30 drivers/block/loop.c:1414
 __blkdev_driver_ioctl block/ioctl.c:297 [inline]
 blkdev_ioctl+0x8d0/0x1870 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/0x520 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459897
RSP: 002b:00007fff11736be8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459897
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000003
RBP: 0000000000000217 R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff11736c20 R14: 000000000004b8ab R15: 00007fff11736c30
INFO: task syz-executor.5:3607 blocked for more than 140 seconds.
      Not tainted 4.14.146+ #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5  D25312  3607      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+0x595/0x13e0 kernel/locking/mutex.c:893
 lo_open+0x19/0xb0 drivers/block/loop.c:1623
 __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/0xe20 fs/open.c:789
 vfs_open+0x105/0x230 fs/open.c:903
 do_last fs/namei.c:3539 [inline]
 path_openat+0xb6c/0x2be0 fs/namei.c:3681
 do_filp_open+0x1a1/0x280 fs/namei.c:3715
 do_sys_open+0x2ca/0x590 fs/open.c:1096
 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4138f0
RSP: 002b:00007ffd811c5b58 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 000000000004c60f RCX: 00000000004138f0
RDX: 00007ffd811c5bea RSI: 0000000000000002 RDI: 00007ffd811c5be0
RBP: 0000000000000242 R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd811c5b90 R14: 000000000004c2e3 R15: 00007ffd811c5ba0
INFO: task syz-executor.2:6683 blocked for more than 140 seconds.
      Not tainted 4.14.146+ #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2  D25312  6683      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+0x595/0x13e0 kernel/locking/mutex.c:893
 lo_open+0x19/0xb0 drivers/block/loop.c:1623
 __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/0xe20 fs/open.c:789
 vfs_open+0x105/0x230 fs/open.c:903
 do_last fs/namei.c:3539 [inline]
 path_openat+0xb6c/0x2be0 fs/namei.c:3681
 do_filp_open+0x1a1/0x280 fs/namei.c:3715
 do_sys_open+0x2ca/0x590 fs/open.c:1096
 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4138f0
RSP: 002b:00007ffdd1dbfb98 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 000000000004c3d8 RCX: 00000000004138f0
RDX: 00007ffdd1dbfc2a RSI: 0000000000000002 RDI: 00007ffdd1dbfc20
RBP: 0000000000000144 R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdd1dbfbd0 R14: 000000000004c2e9 R15: 00007ffdd1dbfbe0
INFO: task syz-executor.4:9341 blocked for more than 140 seconds.
      Not tainted 4.14.146+ #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D25312  9341      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+0x595/0x13e0 kernel/locking/mutex.c:893
 lo_open+0x19/0xb0 drivers/block/loop.c:1623
 __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/0xe20 fs/open.c:789
 vfs_open+0x105/0x230 fs/open.c:903
 do_last fs/namei.c:3539 [inline]
 path_openat+0xb6c/0x2be0 fs/namei.c:3681
 do_filp_open+0x1a1/0x280 fs/namei.c:3715
 do_sys_open+0x2ca/0x590 fs/open.c:1096
 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4138f0
RSP: 002b:00007fff7708b9e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 000000000004c616 RCX: 00000000004138f0
RDX: 00007fff7708ba7a RSI: 0000000000000002 RDI: 00007fff7708ba70
RBP: 000000000000007a R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff7708ba20 R14: 000000000004c2e8 R15: 00007fff7708ba30
INFO: task syz-executor.1:10998 blocked for more than 140 seconds.
      Not tainted 4.14.146+ #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1  D28880 10998   1855 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+0x595/0x13e0 kernel/locking/mutex.c:893
 loop_control_ioctl+0x183/0x310 drivers/block/loop.c:1996
 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/0x520 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x459a29
RSP: 002b:00007f9a99d2bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459a29
RDX: 0000000000000000 RSI: 0000000000004c81 RDI: 0000000000000008
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9a99d2c6d4
R13: 00000000004c317e R14: 00000000004d6a80 R15: 00000000ffffffff
INFO: task syz-executor.3:10994 blocked for more than 140 seconds.
      Not tainted 4.14.146+ #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D29008 10994   5086 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+0x595/0x13e0 kernel/locking/mutex.c:893
 blkdev_put+0x27/0x4c0 fs/block_dev.c:1814
 blkdev_close+0x86/0xb0 fs/block_dev.c:1863
 __fput+0x25e/0x710 fs/file_table.c:210
 task_work_run+0x125/0x1a0 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:164
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x3a3/0x520 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x413711
RSP: 002b:00007ffd9e1cbaf0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000413711
RDX: 0000000000000000 RSI: 0000000000000800 RDI: 0000000000000004
RBP: 0000000000000001 R08: 0000000099a26800 R09: 0000000099a26804
R10: 00007ffd9e1cbbd0 R11: 0000000000000293 R12: 000000000075c9a0
R13: 000000000075c9a0 R14: 0000000000760300 R15: 000000000075bfd4
INFO: task syz-executor.3:11001 blocked for more than 140 seconds.
      Not tainted 4.14.146+ #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D28768 11001   5086 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+0x595/0x13e0 kernel/locking/mutex.c:893
 lo_open+0x19/0xb0 drivers/block/loop.c:1623
 __blkdev_get+0x963/0xf90 fs/block_dev.c:1537
 blkdev_get+0x44b/0x8b0 fs/block_dev.c:1612
 blkdev_get_by_path+0x8e/0xf0 fs/block_dev.c:1690
 mount_bdev+0x4c/0x360 fs/super.c:1107
 mount_fs+0x277/0x312 fs/super.c:1255
 vfs_kern_mount.part.0+0xc7/0x4a0 fs/namespace.c:1056
 vfs_kern_mount fs/namespace.c:1038 [inline]
 do_new_mount fs/namespace.c:2573 [inline]
 do_mount+0x3f6/0x26a0 fs/namespace.c:2903
 SYSC_mount fs/namespace.c:3119 [inline]
 SyS_mount+0xa8/0x120 fs/namespace.c:3096
 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45c47a
RSP: 002b:00007fb2bddbca88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fb2bddbcb40 RCX: 000000000045c47a
RDX: 00007fb2bddbcae0 RSI: 0000000020000000 RDI: 00007fb2bddbcb00
RBP: 0000000000000001 R08: 00007fb2bddbcb40 R09: 00007fb2bddbcae0
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000003
R13: 00000000004c8b8d R14: 00000000004dfc78 R15: 00000000ffffffff
INFO: task blkid:11003 blocked for more than 140 seconds.
      Not tainted 4.14.146+ #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
blkid           D28880 11003   2853 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+0x595/0x13e0 kernel/locking/mutex.c:893
 lo_open+0x19/0xb0 drivers/block/loop.c:1623
 __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/0xe20 fs/open.c:789
 vfs_open+0x105/0x230 fs/open.c:903
 do_last fs/namei.c:3539 [inline]
 path_openat+0xb6c/0x2be0 fs/namei.c:3681
 do_filp_open+0x1a1/0x280 fs/namei.c:3715
 do_sys_open+0x2ca/0x590 fs/open.c:1096
 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x7efe1100d120
RSP: 002b:00007fff49b16fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007efe1100d120
RDX: 00007fff49b17f41 RSI: 0000000000000000 RDI: 00007fff49b17f41
RBP: 0000000000000000 R08: 0000000000000078 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000a94030
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005
INFO: task blkid:11004 blocked for more than 140 seconds.
      Not tainted 4.14.146+ #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
blkid           D27824 11004   2856 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+0x595/0x13e0 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/0xe20 fs/open.c:789
 vfs_open+0x105/0x230 fs/open.c:903
 do_last fs/namei.c:3539 [inline]
 path_openat+0xb6c/0x2be0 fs/namei.c:3681
 do_filp_open+0x1a1/0x280 fs/namei.c:3715
 do_sys_open+0x2ca/0x590 fs/open.c:1096
 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x7fe031cec120
RSP: 002b:00007ffdc69eab78 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe031cec120
RDX: 00007ffdc69ecf41 RSI: 0000000000000000 RDI: 00007ffdc69ecf41
RBP: 0000000000000000 R08: 0000000000000078 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000022f4030
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005

Showing all locks held in the system:
1 lock held by khungtaskd/23:
 #0:  (tasklist_lock){.+.?}, at: [<00000000e8de86c6>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4541
2 locks held by getty/1760:
 #0:  (&tty->ldisc_sem){++++}, at: [<000000006cfed1c5>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<0000000058d490be>] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156
2 locks held by syz-executor.0/1847:
 #0:  (&lo->lo_ctl_mutex/1){+.+.}, at: [<000000006cd8b9c3>] lo_ioctl+0x86/0x1a30 drivers/block/loop.c:1404
 #1:  (&bdev->bd_mutex){+.+.}, at: [<0000000002a9bb5e>] blkdev_reread_part+0x1b/0x40 block/ioctl.c:192
2 locks held by syz-executor.5/3607:
 #0:  (&bdev->bd_mutex){+.+.}, at: [<00000000b524507e>] __blkdev_get+0xf3/0xf90 fs/block_dev.c:1457
 #1:  (loop_index_mutex){+.+.}, at: [<000000009ca277cc>] lo_open+0x19/0xb0 drivers/block/loop.c:1623
2 locks held by syz-executor.2/6683:
 #0:  (&bdev->bd_mutex){+.+.}, at: [<00000000b524507e>] __blkdev_get+0xf3/0xf90 fs/block_dev.c:1457
 #1:  (loop_index_mutex){+.+.}, at: [<000000009ca277cc>] lo_open+0x19/0xb0 drivers/block/loop.c:1623
2 locks held by syz-executor.4/9341:
 #0:  (&bdev->bd_mutex){+.+.}, at: [<00000000b524507e>] __blkdev_get+0xf3/0xf90 fs/block_dev.c:1457
 #1:  (loop_index_mutex){+.+.}, at: [<000000009ca277cc>] lo_open+0x19/0xb0 drivers/block/loop.c:1623
2 locks held by syz-executor.1/10998:
 #0:  (loop_index_mutex){+.+.}, at: [<000000007d686b9f>] loop_control_ioctl+0x71/0x310 drivers/block/loop.c:1982
 #1:  (&lo->lo_ctl_mutex#2){+.+.}, at: [<0000000034d3afa5>] loop_control_ioctl+0x183/0x310 drivers/block/loop.c:1996
1 lock held by syz-executor.3/10994:
 #0:  (&bdev->bd_mutex){+.+.}, at: [<0000000065645d4a>] blkdev_put+0x27/0x4c0 fs/block_dev.c:1814
2 locks held by syz-executor.3/11001:
 #0:  (&bdev->bd_mutex){+.+.}, at: [<00000000b524507e>] __blkdev_get+0xf3/0xf90 fs/block_dev.c:1457
 #1:  (loop_index_mutex){+.+.}, at: [<000000009ca277cc>] lo_open+0x19/0xb0 drivers/block/loop.c:1623
2 locks held by blkid/11003:
 #0:  (&bdev->bd_mutex){+.+.}, at: [<00000000b524507e>] __blkdev_get+0xf3/0xf90 fs/block_dev.c:1457
 #1:  (loop_index_mutex){+.+.}, at: [<000000009ca277cc>] lo_open+0x19/0xb0 drivers/block/loop.c:1623
1 lock held by blkid/11004:
 #0:  (&bdev->bd_mutex){+.+.}, at: [<00000000b524507e>] __blkdev_get+0xf3/0xf90 fs/block_dev.c:1457

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

NMI backtrace for cpu 0
CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.146+ #0
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xca/0x134 lib/dump_stack.c:53
 nmi_cpu_backtrace.cold+0x47/0x86 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x119/0x147 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline]
 watchdog+0x629/0xbe0 kernel/hung_task.c:274
 kthread+0x31f/0x430 kernel/kthread.c:232
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:404
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 1630 Comm: rs:main Q:Reg Not tainted 4.14.146+ #0
task: 00000000b539701c task.stack: 00000000f5cd7f27
RIP: 0010:__read_once_size include/linux/compiler.h:183 [inline]
RIP: 0010:lookup_chain_cache kernel/locking/lockdep.c:2357 [inline]
RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:2377 [inline]
RIP: 0010:validate_chain kernel/locking/lockdep.c:2431 [inline]
RIP: 0010:__lock_acquire+0xb8b/0x4320 kernel/locking/lockdep.c:3487
RSP: 0018:ffff8881d44877a0 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: 00000000a1ca74e1 RCX: 1ffff1103a9d8cde
RDX: 1ffffffff3121c46 RSI: ffff8881d4ec6630 RDI: 0000000000000000
RBP: ffff8881d4487968 R08: 0000000000004712 R09: 0000000000000004
R10: ffff8881d4ec66d0 R11: 386ef53cf4502aed R12: 000000005285b60c
R13: 0000000000000000 R14: ffff8881d4ec5e00 R15: 0000000000000000
FS:  00007f8406d47700(0000) GS:ffff8881dbb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3c4eade000 CR3: 00000001d556c001 CR4: 00000000001606a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 lock_acquire+0x12b/0x360 kernel/locking/lockdep.c:3991
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:152
 spin_lock include/linux/spinlock.h:317 [inline]
 writeback_single_inode+0x215/0x370 fs/fs-writeback.c:1482
 sync_inode fs/fs-writeback.c:2505 [inline]
 sync_inode_metadata+0xb8/0xf0 fs/fs-writeback.c:2525
 __generic_file_fsync+0x121/0x190 fs/libfs.c:988
 ext4_sync_file+0x3ac/0x1250 fs/ext4/fsync.c:120
 vfs_fsync_range+0x106/0x260 fs/sync.c:196
 generic_write_sync include/linux/fs.h:2699 [inline]
 ext4_file_write_iter+0x883/0xdb0 fs/ext4/file.c:279
 call_write_iter include/linux/fs.h:1788 [inline]
 new_sync_write fs/read_write.c:471 [inline]
 __vfs_write+0x401/0x5a0 fs/read_write.c:484
 vfs_write+0x17f/0x4d0 fs/read_write.c:546
 SYSC_write fs/read_write.c:594 [inline]
 SyS_write+0x102/0x250 fs/read_write.c:586
 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x7f84087a519d
RSP: 002b:00007f8406d45f90 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000400 RCX: 00007f84087a519d
RDX: 0000000000000400 RSI: 0000000001750a90 RDI: 0000000000000005
RBP: 0000000001750a90 R08: 30303030303c5b20 R09: 3534323562303030
R10: 5f5f205d3e653730 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f8406d46410 R14: 00000000017a5440 R15: 0000000001750890
Code: af c3 49 c1 e8 31 4a 8d 04 c5 a0 a9 8e 98 48 89 c2 48 89 84 24 98 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 <0f> 85 5e 2c 00 00 4a 8b 1c c5 a0 a9 8e 98 48 85 db 0f 84 0d 05