INFO: task syz-executor.4:14884 blocked for more than 140 seconds.
      Not tainted 4.14.156-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D25312 14884      1 0x00000004
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3499
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3557
 __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: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/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: 0033:0x4143f0
RSP: 002b:00007ffd095eef88 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00000000000975cd RCX: 00000000004143f0
RDX: 00007ffd095ef01a RSI: 0000000000000002 RDI: 00007ffd095ef010
RBP: 00000000000004d7 R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd095eefc0 R14: 000000000009749b R15: 00007ffd095eefd0
INFO: task syz-executor.5:17122 blocked for more than 140 seconds.
      Not tainted 4.14.156-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5  D25312 17122      1 0x00000004
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3499
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3557
 __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: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/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: 0033:0x4143f0
RSP: 002b:00007ffd9812cc98 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00000000000977e0 RCX: 00000000004143f0
RDX: 00007ffd9812cd2a RSI: 0000000000000002 RDI: 00007ffd9812cd20
RBP: 00000000000003ea R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd9812ccd0 R14: 00000000000974a5 R15: 00007ffd9812cce0
INFO: task syz-executor.3:28621 blocked for more than 140 seconds.
      Not tainted 4.14.156-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D25312 28621      1 0x00000004
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3499
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3557
 __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: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/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: 0033:0x4143f0
RSP: 002b:00007ffd04fcea68 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00000000000975b9 RCX: 00000000004143f0
RDX: 00007ffd04fceafa RSI: 0000000000000002 RDI: 00007ffd04fceaf0
RBP: 00000000000001d4 R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd04fceaa0 R14: 00000000000972f4 R15: 00007ffd04fceab0
INFO: task syz-executor.2:915 blocked for more than 140 seconds.
      Not tainted 4.14.156-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2  D25312   915      1 0x00000004
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3499
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3557
 __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: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/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: 0033:0x4143f0
RSP: 002b:00007fff85917f58 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000097515 RCX: 00000000004143f0
RDX: 00007fff85917fea RSI: 0000000000000002 RDI: 00007fff85917fe0
RBP: 0000000000000475 R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff85917f90 R14: 00000000000974a2 R15: 00007fff85917fa0
INFO: task syz-executor.0:9641 blocked for more than 140 seconds.
      Not tainted 4.14.156-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0  D28656  9641   8745 0x00000004
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3499
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3557
 __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: 0033:0x45a4e7
RSP: 002b:00007fef356b39f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fef356b46d4 RCX: 000000000045a4e7
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000000c
R10: 0000000000000064 R11: 0000000000000246 R12: 0000000000000006
R13: 0000000000000000 R14: 0000000000000007 R15: 00000000ffffffff
INFO: task syz-executor.0:9651 blocked for more than 140 seconds.
      Not tainted 4.14.156-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0  D27584  9651   8745 0x00000004
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3499
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3557
 __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: 0033:0x414411
RSP: 002b:00007fef356929f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fef356936d4 RCX: 0000000000414411
RDX: 00007fef35692baa RSI: 0000000000000002 RDI: 00007fef35692ba0
RBP: 0000000000000001 R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000293 R12: 0000000000000006
R13: 0000000000000006 R14: 00007fef356936d4 R15: 00000000ffffffff
INFO: task syz-executor.1:9643 blocked for more than 140 seconds.
      Not tainted 4.14.156-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1  D27936  9643   8755 0x00000004
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3499
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3557
 __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:1997
 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: 0033:0x45a679
RSP: 002b:00007f01835a5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a679
RDX: 0000000000000000 RSI: 0000000000004c81 RDI: 0000000000000005
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f01835a66d4
R13: 00000000004c40dc R14: 00000000004d8b38 R15: 00000000ffffffff
INFO: task syz-executor.1:9659 blocked for more than 140 seconds.
      Not tainted 4.14.156-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1  D28880  9659   8755 0x00000004
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3499
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3557
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893
 loop_control_ioctl+0x71/0x310 drivers/block/loop.c:1983
 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: 0033:0x45a679
RSP: 002b:00007f0183584c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a679
RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000005
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f01835856d4
R13: 00000000004c40b1 R14: 00000000004d8b08 R15: 00000000ffffffff
INFO: task syz-executor.1:9667 blocked for more than 140 seconds.
      Not tainted 4.14.156-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1  D29024  9667   8755 0x00000004
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3499
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3557
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893
 loop_control_ioctl+0x71/0x310 drivers/block/loop.c:1983
 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: 0033:0x45a679
RSP: 002b:00007f0183542c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a679
RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000006
RBP: 000000000075c118 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f01835436d4
R13: 00000000004c40b1 R14: 00000000004d8b08 R15: 00000000ffffffff
INFO: task syz-executor.1:9669 blocked for more than 140 seconds.
      Not tainted 4.14.156-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1  D29952  9669   8755 0x00000004
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3499
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3557
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893
 loop_control_ioctl+0x71/0x310 drivers/block/loop.c:1983
 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: 0033:0x45a679
RSP: 002b:00007f0183521c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a679
RDX: 0000000000000000 RSI: 0000000000004c81 RDI: 0000000000000006
RBP: 000000000075c1c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f01835226d4
R13: 00000000004c40dc R14: 00000000004d8b38 R15: 00000000ffffffff

Showing all locks held in the system:
1 lock held by khungtaskd/23:
 #0:  (tasklist_lock){.+.+}, at: [<00000000a4eb4a0b>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4544
2 locks held by getty/1763:
 #0:  (&tty->ldisc_sem){++++}, at: [<0000000050c1caaf>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<00000000f71982eb>] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156
2 locks held by syz-executor.4/14884:
 #0:  (&bdev->bd_mutex){+.+.}, at: [<00000000c953caa3>] __blkdev_get+0xf3/0xf90 fs/block_dev.c:1457
 #1:  (loop_index_mutex){+.+.}, at: [<00000000d0ec36c2>] lo_open+0x19/0xb0 drivers/block/loop.c:1624
2 locks held by syz-executor.5/17122:
 #0:  (&bdev->bd_mutex){+.+.}, at: [<00000000c953caa3>] __blkdev_get+0xf3/0xf90 fs/block_dev.c:1457
 #1:  (loop_index_mutex){+.+.}, at: [<00000000d0ec36c2>] lo_open+0x19/0xb0 drivers/block/loop.c:1624
2 locks held by syz-executor.3/28621:
 #0:  (&bdev->bd_mutex){+.+.}, at: [<00000000c953caa3>] __blkdev_get+0xf3/0xf90 fs/block_dev.c:1457
 #1:  (loop_index_mutex){+.+.}, at: [<00000000d0ec36c2>] lo_open+0x19/0xb0 drivers/block/loop.c:1624
2 locks held by syz-executor.2/915:
 #0:  (&bdev->bd_mutex){+.+.}, at: [<00000000c953caa3>] __blkdev_get+0xf3/0xf90 fs/block_dev.c:1457
 #1:  (loop_index_mutex){+.+.}, at: [<00000000d0ec36c2>] lo_open+0x19/0xb0 drivers/block/loop.c:1624
2 locks held by syz-executor.0/9641:
 #0:  (&lo->lo_ctl_mutex/1){+.+.}, at: [<000000004825c354>] lo_ioctl+0x86/0x1a30 drivers/block/loop.c:1404
 #1:  (&bdev->bd_mutex){+.+.}, at: [<00000000c08ce817>] blkdev_reread_part+0x1b/0x40 block/ioctl.c:192
1 lock held by syz-executor.0/9651:
 #0:  (&bdev->bd_mutex){+.+.}, at: [<00000000c953caa3>] __blkdev_get+0xf3/0xf90 fs/block_dev.c:1457
2 locks held by syz-executor.1/9643:
 #0:  (loop_index_mutex){+.+.}, at: [<00000000a93000a2>] loop_control_ioctl+0x71/0x310 drivers/block/loop.c:1983
 #1:  (&lo->lo_ctl_mutex#2){+.+.}, at: [<000000001d141251>] loop_control_ioctl+0x183/0x310 drivers/block/loop.c:1997
1 lock held by syz-executor.1/9659:
 #0:  (loop_index_mutex){+.+.}, at: [<00000000a93000a2>] loop_control_ioctl+0x71/0x310 drivers/block/loop.c:1983
1 lock held by syz-executor.1/9667:
 #0:  (loop_index_mutex){+.+.}, at: [<00000000a93000a2>] loop_control_ioctl+0x71/0x310 drivers/block/loop.c:1983
1 lock held by syz-executor.1/9669:
 #0:  (loop_index_mutex){+.+.}, at: [<00000000a93000a2>] loop_control_ioctl+0x71/0x310 drivers/block/loop.c:1983
2 locks held by blkid/9646:
 #0:  (&bdev->bd_mutex){+.+.}, at: [<00000000c953caa3>] __blkdev_get+0xf3/0xf90 fs/block_dev.c:1457
 #1:  (loop_index_mutex){+.+.}, at: [<00000000d0ec36c2>] lo_open+0x19/0xb0 drivers/block/loop.c:1624

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

NMI backtrace for cpu 1
CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.156-syzkaller #0
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xe5/0x154 lib/dump_stack.c:58
 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 1633 Comm: rs:main Q:Reg Not tainted 4.14.156-syzkaller #0
task: 00000000a512aacf task.stack: 0000000040f36fda
RIP: 0010:__lock_acquire+0x1a5/0x4320 kernel/locking/lockdep.c:3392
RSP: 0018:ffff8881d40176d0 EFLAGS: 00000006
RAX: ffffffffbd5653e0 RBX: 0000000000000000 RCX: ffffffffba1fe1f6
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffffbd565518
RBP: ffff8881d40178a0 R08: 0000000000000001 R09: fffffbfff7aacaa4
R10: fffffbfff7aacaa3 R11: ffffffffbd56551b R12: 0000000000000000
R13: 0000000000000000 R14: ffff8881d486c680 R15: ffff8881ce3a0290
FS:  00007fecfe008700(0000) GS:ffff8881db800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001b07000 CR3: 00000001d6118002 CR4: 00000000001606b0
DR0: 0000000020000040 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 reacquire_held_locks+0xb5/0x3f0 kernel/locking/lockdep.c:3630
 __lock_release kernel/locking/lockdep.c:3793 [inline]
 lock_release+0x32c/0x740 kernel/locking/lockdep.c:4013
 __raw_spin_unlock include/linux/spinlock_api_smp.h:150 [inline]
 _raw_spin_unlock+0x17/0x40 kernel/locking/spinlock.c:184
 spin_unlock include/linux/spinlock.h:357 [inline]
 writeback_single_inode+0x24f/0x370 fs/fs-writeback.c:1492
 sync_inode fs/fs-writeback.c:2508 [inline]
 sync_inode_metadata+0xb8/0xf0 fs/fs-writeback.c:2528
 __generic_file_fsync+0x121/0x190 fs/libfs.c:992
 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:2713 [inline]
 ext4_file_write_iter+0x883/0xdb0 fs/ext4/file.c:279
 call_write_iter include/linux/fs.h:1798 [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: 0033:0x7fecffa6619d
RSP: 002b:00007fecfe007000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00000000000000c3 RCX: 00007fecffa6619d
RDX: 00000000000000c3 RSI: 0000000001af7a90 RDI: 0000000000000001
RBP: 0000000001af7a90 R08: 0000000001b569d0 R09: 656c6c616b7a7973
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007fecfe007480 R14: 0000000000000003 R15: 0000000001af7890
Code: 00 00 be 04 00 00 00 44 89 84 24 80 00 00 00 48 89 84 24 88 00 00 00 e8 8a f0 33 00 48 8b 84 24 88 00 00 00 f0 ff 80 38 01 00 00 <49> 8d b6 28 08 00 00 44 8b 84 24 80 00 00 00 48 ba 00 00 00 00