======================================================
WARNING: possible circular locking dependency detected
4.20.0 #289 Not tainted
------------------------------------------------------
syz-executor5/2223 is trying to acquire lock:
kobject: 'loop3' (00000000eeab1823): kobject_uevent_env
000000000dfac7a2 (&bdev->bd_mutex){+.+.}, at: blkdev_reread_part+0x1e/0x40 block/ioctl.c:192

but task is already holding lock:
00000000ba445a3d (&lo->lo_ctl_mutex#2){+.+.}, at: lo_compat_ioctl+0x11b/0x170 drivers/block/loop.c:1591

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (&lo->lo_ctl_mutex#2){+.+.}:
       __mutex_lock_common kernel/locking/mutex.c:925 [inline]
       __mutex_lock+0x166/0x1700 kernel/locking/mutex.c:1072
       mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
       __lo_release drivers/block/loop.c:1650 [inline]
       lo_release+0xa3/0x1f0 drivers/block/loop.c:1674
kobject: 'loop3' (00000000eeab1823): fill_kobj_path: path = '/devices/virtual/block/loop3'
       __blkdev_put+0x4f6/0x830 fs/block_dev.c:1796
       blkdev_put+0x98/0x540 fs/block_dev.c:1858
       blkdev_close+0x8b/0xb0 fs/block_dev.c:1865
       __fput+0x385/0xa30 fs/file_table.c:278
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
       ____fput+0x15/0x20 fs/file_table.c:309
       task_work_run+0x1e8/0x2a0 kernel/task_work.c:113
       tracehook_notify_resume include/linux/tracehook.h:188 [inline]
       exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166
       prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
       syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
       do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
       entry_SYSCALL_64_after_hwframe+0x49/0xbe

-> #1 (loop_index_mutex){+.+.}:
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
       __mutex_lock_common kernel/locking/mutex.c:925 [inline]
       __mutex_lock+0x166/0x1700 kernel/locking/mutex.c:1072
       mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
       lo_open+0x1b/0xb0 drivers/block/loop.c:1630
       __blkdev_get+0x360/0x13c0 fs/block_dev.c:1482
       blkdev_get+0xc1/0xb50 fs/block_dev.c:1617
       blkdev_open+0x1fb/0x280 fs/block_dev.c:1775
       do_dentry_open+0x499/0x1250 fs/open.c:771
       vfs_open+0xa0/0xd0 fs/open.c:880
kobject: 'loop1' (00000000d144f960): kobject_uevent_env
       do_last fs/namei.c:3418 [inline]
       path_openat+0x12bc/0x5160 fs/namei.c:3534
       do_filp_open+0x255/0x380 fs/namei.c:3564
       do_sys_open+0x568/0x700 fs/open.c:1063
       __do_sys_open fs/open.c:1081 [inline]
       __se_sys_open fs/open.c:1076 [inline]
       __x64_sys_open+0x7e/0xc0 fs/open.c:1076
       do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
       entry_SYSCALL_64_after_hwframe+0x49/0xbe

-> #0 (&bdev->bd_mutex){+.+.}:
kobject: 'loop1' (00000000d144f960): fill_kobj_path: path = '/devices/virtual/block/loop1'
       lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844
       __mutex_lock_common kernel/locking/mutex.c:925 [inline]
       __mutex_lock+0x166/0x1700 kernel/locking/mutex.c:1072
       mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
       blkdev_reread_part+0x1e/0x40 block/ioctl.c:192
       loop_reread_partitions+0x163/0x190 drivers/block/loop.c:644
       loop_set_status+0xb95/0x1010 drivers/block/loop.c:1198
       loop_set_status_compat+0xa4/0xf0 drivers/block/loop.c:1563
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
       lo_compat_ioctl+0x13a/0x170 drivers/block/loop.c:1593
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
       compat_blkdev_ioctl+0x3ca/0x1b30 block/compat_ioctl.c:406
       __do_compat_sys_ioctl fs/compat_ioctl.c:1052 [inline]
       __se_compat_sys_ioctl fs/compat_ioctl.c:998 [inline]
       __ia32_compat_sys_ioctl+0x20e/0x630 fs/compat_ioctl.c:998
       do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
       do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397
       entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139

other info that might help us debug this:

Chain exists of:
  &bdev->bd_mutex --> loop_index_mutex --> &lo->lo_ctl_mutex#2

 Possible unsafe locking scenario:

kobject: 'loop0' (000000009a12735f): kobject_uevent_env
       CPU0                    CPU1
       ----                    ----
  lock(&lo->lo_ctl_mutex#2);
                               lock(loop_index_mutex);
                               lock(&lo->lo_ctl_mutex#2);
  lock(&bdev->bd_mutex);

 *** DEADLOCK ***

kobject: '0:484' (0000000071ffb06e): kobject_add_internal: parent: 'bdi', set: 'devices'
1 lock held by syz-executor5/2223:
 #0: 00000000ba445a3d (&lo->lo_ctl_mutex#2){+.+.}, at: lo_compat_ioctl+0x11b/0x170 drivers/block/loop.c:1591
kobject: 'loop0' (000000009a12735f): fill_kobj_path: path = '/devices/virtual/block/loop0'

stack backtrace:
CPU: 0 PID: 2223 Comm: syz-executor5 Not tainted 4.20.0 #289
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d3/0x2c6 lib/dump_stack.c:113
 print_circular_bug.isra.33.cold.54+0x1bd/0x27d kernel/locking/lockdep.c:1221
kobject: '0:484' (0000000071ffb06e): kobject_uevent_env
 check_prev_add kernel/locking/lockdep.c:1863 [inline]
 check_prevs_add kernel/locking/lockdep.c:1976 [inline]
 validate_chain kernel/locking/lockdep.c:2347 [inline]
 __lock_acquire+0x3360/0x4c20 kernel/locking/lockdep.c:3341
kobject: '0:484' (0000000071ffb06e): fill_kobj_path: path = '/devices/virtual/bdi/0:484'
 lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844
 __mutex_lock_common kernel/locking/mutex.c:925 [inline]
 __mutex_lock+0x166/0x1700 kernel/locking/mutex.c:1072
kobject: 'loop3' (00000000eeab1823): kobject_uevent_env
kobject: 'loop3' (00000000eeab1823): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
 blkdev_reread_part+0x1e/0x40 block/ioctl.c:192
 loop_reread_partitions+0x163/0x190 drivers/block/loop.c:644
 loop_set_status+0xb95/0x1010 drivers/block/loop.c:1198
 loop_set_status_compat+0xa4/0xf0 drivers/block/loop.c:1563
 lo_compat_ioctl+0x13a/0x170 drivers/block/loop.c:1593
 compat_blkdev_ioctl+0x3ca/0x1b30 block/compat_ioctl.c:406
 __do_compat_sys_ioctl fs/compat_ioctl.c:1052 [inline]
 __se_compat_sys_ioctl fs/compat_ioctl.c:998 [inline]
 __ia32_compat_sys_ioctl+0x20e/0x630 fs/compat_ioctl.c:998
 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
 do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397
kobject: 'loop3' (00000000eeab1823): kobject_uevent_env
kobject: 'loop3' (00000000eeab1823): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7f7da49
Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000f5f790cc EFLAGS: 00000296 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000004c02
RDX: 0000000020000000 RSI: 0000000000000000 RDI: 0000000000000000
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
loop_reread_partitions: partition scan of loop7 (ʜ�2*$yc�) failed (rc=-13)
kobject: '0:484' (0000000071ffb06e): kobject_uevent_env
kobject: 'loop3' (00000000eeab1823): kobject_uevent_env
kobject: 'loop3' (00000000eeab1823): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop7' (000000004db29a3a): kobject_uevent_env
kobject: '0:484' (0000000071ffb06e): fill_kobj_path: path = '/devices/virtual/bdi/0:484'
kobject: 'loop7' (000000004db29a3a): fill_kobj_path: path = '/devices/virtual/block/loop7'
kobject: '0:484' (0000000071ffb06e): kobject_cleanup, parent           (null)
loop_reread_partitions: partition scan of loop7 () failed (rc=-13)
kobject: '0:484' (0000000071ffb06e): calling ktype release
kobject: '0:484': free name
kobject: 'loop5' (00000000920652c4): kobject_uevent_env
kobject: 'loop5' (00000000920652c4): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop1' (00000000d144f960): kobject_uevent_env
kobject: 'loop1' (00000000d144f960): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
kobject: '0:484' (0000000043d74488): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop0' (000000009a12735f): kobject_uevent_env
kobject: '0:484' (0000000043d74488): kobject_uevent_env
kobject: 'loop0' (000000009a12735f): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: '0:484' (0000000043d74488): fill_kobj_path: path = '/devices/virtual/bdi/0:484'
kobject: 'loop5' (00000000920652c4): kobject_uevent_env
kobject: 'loop5' (00000000920652c4): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: '0:484' (0000000043d74488): kobject_uevent_env
kobject: '0:484' (0000000043d74488): fill_kobj_path: path = '/devices/virtual/bdi/0:484'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: '0:484' (0000000043d74488): kobject_cleanup, parent           (null)
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: '0:484' (0000000043d74488): calling ktype release
kobject: '0:484': free name
kobject: 'loop3' (00000000eeab1823): kobject_uevent_env
kobject: 'loop3' (00000000eeab1823): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop0' (000000009a12735f): kobject_uevent_env
kobject: 'loop0' (000000009a12735f): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
loop_reread_partitions: partition scan of loop0 (ʜ�2*$yc�Ѳ��B��h�6
�^�߽���f����j��w�U�	�F��͝3��pA��`) failed (rc=-13)
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (000000009a12735f): kobject_uevent_env
kobject: 'loop0' (000000009a12735f): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000920652c4): kobject_uevent_env
kobject: 'loop5' (00000000920652c4): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop3' (00000000eeab1823): kobject_uevent_env
kobject: '0:484' (000000001f39ca07): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: 'loop3' (00000000eeab1823): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: '0:484' (000000001f39ca07): kobject_uevent_env
kobject: '0:484' (000000001f39ca07): fill_kobj_path: path = '/devices/virtual/bdi/0:484'
kobject: 'loop0' (000000009a12735f): kobject_uevent_env
kobject: 'loop0' (000000009a12735f): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: '0:484' (000000001f39ca07): kobject_uevent_env
kobject: '0:484' (000000001f39ca07): fill_kobj_path: path = '/devices/virtual/bdi/0:484'
kobject: 'loop5' (00000000920652c4): kobject_uevent_env
kobject: '0:484' (000000001f39ca07): kobject_cleanup, parent           (null)
kobject: 'loop5' (00000000920652c4): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: '0:484' (000000001f39ca07): calling ktype release
kobject: '0:484': free name
kobject: 'loop1' (00000000d144f960): kobject_uevent_env
kobject: 'loop1' (00000000d144f960): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: '0:484' (00000000ac7a5f20): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: '0:484' (00000000ac7a5f20): kobject_uevent_env
kobject: 'loop5' (00000000920652c4): kobject_uevent_env
kobject: '0:484' (00000000ac7a5f20): fill_kobj_path: path = '/devices/virtual/bdi/0:484'
kobject: 'loop5' (00000000920652c4): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: '0:484' (00000000ac7a5f20): kobject_uevent_env
kobject: 'loop3' (00000000eeab1823): kobject_uevent_env
kobject: '0:484' (00000000ac7a5f20): fill_kobj_path: path = '/devices/virtual/bdi/0:484'
kobject: 'loop3' (00000000eeab1823): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
kobject: '0:484' (00000000ac7a5f20): kobject_cleanup, parent           (null)
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: '0:484' (00000000ac7a5f20): calling ktype release
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop3' (00000000eeab1823): kobject_uevent_env
kobject: '0:484': free name
kobject: 'loop3' (00000000eeab1823): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: '0:484' (000000009aaaaca8): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: 'loop5' (00000000920652c4): kobject_uevent_env
kobject: 'loop5' (00000000920652c4): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: '0:484' (000000009aaaaca8): kobject_uevent_env
kobject: 'loop1' (00000000d144f960): kobject_uevent_env
kobject: 'loop1' (00000000d144f960): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: '0:484' (000000009aaaaca8): fill_kobj_path: path = '/devices/virtual/bdi/0:484'
kobject: 'loop5' (00000000920652c4): kobject_uevent_env
kobject: '0:484' (000000009aaaaca8): kobject_uevent_env
kobject: 'loop5' (00000000920652c4): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: '0:484' (000000009aaaaca8): fill_kobj_path: path = '/devices/virtual/bdi/0:484'
kobject: 'loop0' (000000009a12735f): kobject_uevent_env
kobject: '0:484' (000000009aaaaca8): kobject_cleanup, parent           (null)
kobject: 'loop0' (000000009a12735f): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: '0:484' (000000009aaaaca8): calling ktype release
kobject: 'loop3' (00000000eeab1823): kobject_uevent_env
kobject: '0:484': free name
kobject: 'loop3' (00000000eeab1823): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop0' (000000009a12735f): kobject_uevent_env
kobject: 'loop0' (000000009a12735f): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop3' (00000000eeab1823): kobject_uevent_env
kobject: 'loop3' (00000000eeab1823): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop0' (000000009a12735f): kobject_uevent_env
kobject: 'loop0' (000000009a12735f): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: '0:485' (00000000773fda6e): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: '0:485' (00000000773fda6e): kobject_uevent_env
kobject: '0:485' (00000000773fda6e): fill_kobj_path: path = '/devices/virtual/bdi/0:485'
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: '0:485' (00000000773fda6e): kobject_uevent_env
kobject: '0:485' (00000000773fda6e): fill_kobj_path: path = '/devices/virtual/bdi/0:485'
kobject: '0:485' (00000000773fda6e): kobject_cleanup, parent           (null)
kobject: '0:485' (00000000773fda6e): calling ktype release
kobject: 'loop1' (00000000d144f960): kobject_uevent_env
kobject: '0:485': free name
kobject: 'loop1' (00000000d144f960): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop0' (000000009a12735f): kobject_uevent_env
kobject: 'loop0' (000000009a12735f): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: '0:484' (00000000d573a8f2): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: '0:484' (00000000d573a8f2): kobject_uevent_env
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop3' (00000000eeab1823): kobject_uevent_env
kobject: 'loop3' (00000000eeab1823): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: '0:484' (00000000d573a8f2): fill_kobj_path: path = '/devices/virtual/bdi/0:484'
kobject: 'loop0' (000000009a12735f): kobject_uevent_env
kobject: 'loop0' (000000009a12735f): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000920652c4): kobject_uevent_env
kobject: '0:484' (00000000d573a8f2): kobject_uevent_env
kobject: 'loop5' (00000000920652c4): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop0' (000000009a12735f): kobject_uevent_env
kobject: '0:484' (00000000d573a8f2): fill_kobj_path: path = '/devices/virtual/bdi/0:484'
kobject: 'loop0' (000000009a12735f): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: '0:484' (00000000d573a8f2): kobject_cleanup, parent           (null)
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
kobject: '0:484' (00000000d573a8f2): calling ktype release
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: '0:484': free name
kobject: 'loop3' (00000000eeab1823): kobject_uevent_env
kobject: 'loop3' (00000000eeab1823): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop5' (00000000920652c4): kobject_uevent_env
kobject: 'loop5' (00000000920652c4): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop1' (00000000d144f960): kobject_uevent_env
kobject: 'loop1' (00000000d144f960): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: '0:484' (00000000e5638389): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: '0:484' (00000000e5638389): kobject_uevent_env
kobject: '0:484' (00000000e5638389): fill_kobj_path: path = '/devices/virtual/bdi/0:484'
kobject: 'loop0' (000000009a12735f): kobject_uevent_env
kobject: 'loop0' (000000009a12735f): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: '0:484' (00000000e5638389): kobject_uevent_env
kobject: '0:484' (00000000e5638389): fill_kobj_path: path = '/devices/virtual/bdi/0:484'
kobject: '0:484' (00000000e5638389): kobject_cleanup, parent           (null)
kobject: '0:484' (00000000e5638389): calling ktype release
kobject: 'loop5' (00000000920652c4): kobject_uevent_env
kobject: 'loop5' (00000000920652c4): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: '0:484': free name
kobject: '0:484' (000000009833cb72): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: '0:484' (000000009833cb72): kobject_uevent_env
kobject: '0:484' (000000009833cb72): fill_kobj_path: path = '/devices/virtual/bdi/0:484'
kobject: '0:484' (000000009833cb72): kobject_uevent_env
kobject: '0:484' (000000009833cb72): fill_kobj_path: path = '/devices/virtual/bdi/0:484'
kobject: '0:484' (000000009833cb72): kobject_cleanup, parent           (null)
kobject: '0:484' (000000009833cb72): calling ktype release
kobject: '0:484': free name
kobject: 'loop1' (00000000d144f960): kobject_uevent_env
kobject: 'loop1' (00000000d144f960): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop3' (00000000eeab1823): kobject_uevent_env
kobject: 'loop3' (00000000eeab1823): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (000000009a12735f): kobject_uevent_env
kobject: 'loop0' (000000009a12735f): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000920652c4): kobject_uevent_env
kobject: 'loop5' (00000000920652c4): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop5' (00000000920652c4): kobject_uevent_env
kobject: 'loop5' (00000000920652c4): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop0' (000000009a12735f): kobject_uevent_env
kobject: 'loop0' (000000009a12735f): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop1' (00000000d144f960): kobject_uevent_env
kobject: 'loop1' (00000000d144f960): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop3' (00000000eeab1823): kobject_uevent_env
kobject: 'loop3' (00000000eeab1823): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop5' (00000000920652c4): kobject_uevent_env
kobject: 'loop5' (00000000920652c4): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop1' (00000000d144f960): kobject_uevent_env
kobject: 'loop1' (00000000d144f960): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop3' (00000000eeab1823): kobject_uevent_env
kobject: 'loop3' (00000000eeab1823): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop0' (000000009a12735f): kobject_uevent_env
kobject: 'loop0' (000000009a12735f): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop3' (00000000eeab1823): kobject_uevent_env
kobject: 'loop3' (00000000eeab1823): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop1' (00000000d144f960): kobject_uevent_env
kobject: 'loop1' (00000000d144f960): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop0' (000000009a12735f): kobject_uevent_env
kobject: 'loop0' (000000009a12735f): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop3' (00000000eeab1823): kobject_uevent_env
kobject: 'loop3' (00000000eeab1823): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop0' (000000009a12735f): kobject_uevent_env
kobject: 'loop0' (000000009a12735f): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop5' (00000000920652c4): kobject_uevent_env
kobject: '0:484' (000000007bd519bb): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: '0:484' (000000007bd519bb): kobject_uevent_env
kobject: 'loop5' (00000000920652c4): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: '0:484' (000000007bd519bb): fill_kobj_path: path = '/devices/virtual/bdi/0:484'
kobject: '0:484' (000000007bd519bb): kobject_uevent_env
kobject: '0:484' (000000007bd519bb): fill_kobj_path: path = '/devices/virtual/bdi/0:484'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: '0:484' (000000007bd519bb): kobject_cleanup, parent           (null)
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop3' (00000000eeab1823): kobject_uevent_env
kobject: 'loop3' (00000000eeab1823): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: '0:484' (000000007bd519bb): calling ktype release
kobject: 'loop1' (00000000d144f960): kobject_uevent_env
kobject: 'loop1' (00000000d144f960): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: '0:484': free name
kobject: 'loop3' (00000000eeab1823): kobject_uevent_env
kobject: 'loop3' (00000000eeab1823): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop5' (00000000920652c4): kobject_uevent_env
kobject: 'loop5' (00000000920652c4): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop3' (00000000eeab1823): kobject_uevent_env
kobject: 'loop3' (00000000eeab1823): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop1' (00000000d144f960): kobject_uevent_env
kobject: 'loop1' (00000000d144f960): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop5' (00000000920652c4): kobject_uevent_env
kobject: 'loop5' (00000000920652c4): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: '0:484' (00000000c70eb7c5): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: '0:484' (00000000c70eb7c5): kobject_uevent_env
kobject: 'loop0' (000000009a12735f): kobject_uevent_env
kobject: '0:484' (00000000c70eb7c5): fill_kobj_path: path = '/devices/virtual/bdi/0:484'
kobject: 'loop0' (000000009a12735f): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: '0:484' (00000000c70eb7c5): kobject_uevent_env
kobject: '0:484' (00000000c70eb7c5): fill_kobj_path: path = '/devices/virtual/bdi/0:484'
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: '0:484' (00000000c70eb7c5): kobject_cleanup, parent           (null)
kobject: 'loop3' (00000000eeab1823): kobject_uevent_env
kobject: '0:484' (00000000c70eb7c5): calling ktype release
kobject: 'loop3' (00000000eeab1823): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: '0:484': free name
kobject: 'loop5' (00000000920652c4): kobject_uevent_env
kobject: 'loop5' (00000000920652c4): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: '0:484' (000000009c21dc9c): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: '0:484' (000000009c21dc9c): kobject_uevent_env
kobject: '0:484' (000000009c21dc9c): fill_kobj_path: path = '/devices/virtual/bdi/0:484'
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop0' (000000009a12735f): kobject_uevent_env
kobject: '0:484' (000000009c21dc9c): kobject_uevent_env
kobject: '0:484' (000000009c21dc9c): fill_kobj_path: path = '/devices/virtual/bdi/0:484'
kobject: 'loop0' (000000009a12735f): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: '0:484' (000000009c21dc9c): kobject_cleanup, parent           (null)
kobject: 'loop3' (00000000eeab1823): kobject_uevent_env
kobject: '0:484' (000000009c21dc9c): calling ktype release
kobject: 'loop3' (00000000eeab1823): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: '0:484': free name
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop5' (00000000920652c4): kobject_uevent_env
kobject: 'loop5' (00000000920652c4): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (000000009a12735f): kobject_uevent_env
kobject: 'loop0' (000000009a12735f): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
dccp_close: ABORT with 127 bytes unread
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: '0:484' (000000001f6f0262): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: 'loop3' (00000000eeab1823): kobject_uevent_env
kobject: 'loop3' (00000000eeab1823): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: '0:484' (000000001f6f0262): kobject_uevent_env
kobject: 'loop5' (00000000920652c4): kobject_uevent_env
kobject: 'loop5' (00000000920652c4): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: '0:484' (000000001f6f0262): fill_kobj_path: path = '/devices/virtual/bdi/0:484'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: '0:484' (000000001f6f0262): kobject_uevent_env
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
kobject: '0:484' (000000001f6f0262): fill_kobj_path: path = '/devices/virtual/bdi/0:484'
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop0' (000000009a12735f): kobject_uevent_env
kobject: '0:484' (000000001f6f0262): kobject_cleanup, parent           (null)
kobject: 'loop0' (000000009a12735f): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: '0:484' (000000001f6f0262): calling ktype release
kobject: 'loop5' (00000000920652c4): kobject_uevent_env
kobject: '0:484': free name
kobject: 'loop5' (00000000920652c4): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop3' (00000000eeab1823): kobject_uevent_env
kobject: 'loop3' (00000000eeab1823): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
kobject: '0:484' (0000000009e6a41c): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: '0:484' (0000000009e6a41c): kobject_uevent_env
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: '0:484' (0000000009e6a41c): fill_kobj_path: path = '/devices/virtual/bdi/0:484'
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: '0:484' (0000000009e6a41c): kobject_uevent_env
kobject: 'loop0' (000000009a12735f): kobject_uevent_env
kobject: '0:484' (0000000009e6a41c): fill_kobj_path: path = '/devices/virtual/bdi/0:484'
kobject: 'loop0' (000000009a12735f): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop1' (00000000d144f960): kobject_uevent_env
kobject: '0:484' (0000000009e6a41c): kobject_cleanup, parent           (null)
kobject: 'loop1' (00000000d144f960): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: '0:484' (0000000009e6a41c): calling ktype release
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: '0:484': free name
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop5' (00000000920652c4): kobject_uevent_env
kobject: 'loop5' (00000000920652c4): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop0' (000000009a12735f): kobject_uevent_env
kobject: 'loop0' (000000009a12735f): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000920652c4): kobject_uevent_env
kobject: 'loop5' (00000000920652c4): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (000000009a12735f): kobject_uevent_env
kobject: 'loop0' (000000009a12735f): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop1' (00000000d144f960): kobject_uevent_env
kobject: 'loop1' (00000000d144f960): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop0' (000000009a12735f): kobject_uevent_env
kobject: 'loop0' (000000009a12735f): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop0' (000000009a12735f): kobject_uevent_env
kobject: 'loop0' (000000009a12735f): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (000000002d794f9f): kobject_uevent_env
kobject: 'loop2' (000000002d794f9f): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop1' (00000000d144f960): kobject_uevent_env
kobject: 'loop1' (00000000d144f960): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop5' (00000000920652c4): kobject_uevent_env
kobject: 'loop5' (00000000920652c4): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000f5d3bf71): kobject_uevent_env
kobject: 'loop4' (00000000f5d3bf71): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (000000009a12735f): kobject_uevent_env
kobject: 'loop0' (000000009a12735f): fill_kobj_path: path = '/devices/virtual/block/loop0'