======================================================
WARNING: possible circular locking dependency detected
4.19.0-next-20181102+ #104 Not tainted
------------------------------------------------------
kworker/0:3/5840 is trying to acquire lock:
0000000015bb5ce9 (&sb->s_type->i_mutex_key#10){++++}, at: inode_lock include/linux/fs.h:764 [inline]
0000000015bb5ce9 (&sb->s_type->i_mutex_key#10){++++}, at: __generic_file_fsync+0xb5/0x200 fs/libfs.c:999

but task is already holding lock:
00000000758318c1 ((work_completion)(&dio->complete_work)){+.+.}, at: process_one_work+0xb9a/0x1c40 kernel/workqueue.c:2128

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 ((work_completion)(&dio->complete_work)){+.+.}:
       process_one_work+0xc0a/0x1c40 kernel/workqueue.c:2129
       worker_thread+0x17f/0x1390 kernel/workqueue.c:2296
       kthread+0x35a/0x440 kernel/kthread.c:246
       ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352

-> #1 ((wq_completion)"dio/%s"sb->s_id){+.+.}:
       flush_workqueue+0x30a/0x1e10 kernel/workqueue.c:2655
       drain_workqueue+0x2a9/0x640 kernel/workqueue.c:2820
       destroy_workqueue+0xc6/0x9c0 kernel/workqueue.c:4155
       __alloc_workqueue_key+0xe56/0x10a0 kernel/workqueue.c:4138
       sb_init_dio_done_wq+0x37/0x90 fs/direct-io.c:623
       do_blockdev_direct_IO+0x1325/0x9db0 fs/direct-io.c:1283
       __blockdev_direct_IO+0x9d/0xc6 fs/direct-io.c:1417
       ext4_direct_IO_write fs/ext4/inode.c:3774 [inline]
       ext4_direct_IO+0xbdc/0x2220 fs/ext4/inode.c:3901
       generic_file_direct_write+0x275/0x4b0 mm/filemap.c:3043
       __generic_file_write_iter+0x2ff/0x630 mm/filemap.c:3222
       ext4_file_write_iter+0x390/0x1420 fs/ext4/file.c:266
       call_write_iter include/linux/fs.h:1864 [inline]
       aio_write+0x3b1/0x610 fs/aio.c:1562
       io_submit_one+0xaa1/0xf80 fs/aio.c:1836
       __do_sys_io_submit fs/aio.c:1917 [inline]
       __se_sys_io_submit fs/aio.c:1888 [inline]
       __x64_sys_io_submit+0x1b7/0x580 fs/aio.c:1888
       do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
       entry_SYSCALL_64_after_hwframe+0x49/0xbe

-> #0 (&sb->s_type->i_mutex_key#10){++++}:
       lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844
       down_write+0x8a/0x130 kernel/locking/rwsem.c:70
       inode_lock include/linux/fs.h:764 [inline]
       __generic_file_fsync+0xb5/0x200 fs/libfs.c:999
       ext4_sync_file+0xa45/0x1500 fs/ext4/fsync.c:120
       vfs_fsync_range+0x140/0x220 fs/sync.c:197
       generic_write_sync include/linux/fs.h:2796 [inline]
       dio_complete+0x75c/0x9e0 fs/direct-io.c:329
       dio_aio_complete_work+0x20/0x30 fs/direct-io.c:341
       process_one_work+0xc8b/0x1c40 kernel/workqueue.c:2153
       worker_thread+0x17f/0x1390 kernel/workqueue.c:2296
       kthread+0x35a/0x440 kernel/kthread.c:246
       ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352

other info that might help us debug this:

Chain exists of:
  &sb->s_type->i_mutex_key#10 --> (wq_completion)"dio/%s"sb->s_id --> (work_completion)(&dio->complete_work)

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock((work_completion)(&dio->complete_work));
                               lock((wq_completion)"dio/%s"sb->s_id);
                               lock((work_completion)(&dio->complete_work));
  lock(&sb->s_type->i_mutex_key#10);

 *** DEADLOCK ***

2 locks held by kworker/0:3/5840:
 #0: 0000000081a87924 ((wq_completion)"dio/%s"sb->s_id){+.+.}, at: __write_once_size include/linux/compiler.h:209 [inline]
 #0: 0000000081a87924 ((wq_completion)"dio/%s"sb->s_id){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: 0000000081a87924 ((wq_completion)"dio/%s"sb->s_id){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline]
 #0: 0000000081a87924 ((wq_completion)"dio/%s"sb->s_id){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline]
 #0: 0000000081a87924 ((wq_completion)"dio/%s"sb->s_id){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline]
 #0: 0000000081a87924 ((wq_completion)"dio/%s"sb->s_id){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
 #0: 0000000081a87924 ((wq_completion)"dio/%s"sb->s_id){+.+.}, at: process_one_work+0xb43/0x1c40 kernel/workqueue.c:2124
 #1: 00000000758318c1 ((work_completion)(&dio->complete_work)){+.+.}, at: process_one_work+0xb9a/0x1c40 kernel/workqueue.c:2128

stack backtrace:
CPU: 0 PID: 5840 Comm: kworker/0:3 Not tainted 4.19.0-next-20181102+ #104
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: dio/sda1 dio_aio_complete_work
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x244/0x39d lib/dump_stack.c:113
 print_circular_bug.isra.35.cold.54+0x1bd/0x27d kernel/locking/lockdep.c:1221
 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+0x3399/0x4c20 kernel/locking/lockdep.c:3341
 lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844
 down_write+0x8a/0x130 kernel/locking/rwsem.c:70
 inode_lock include/linux/fs.h:764 [inline]
 __generic_file_fsync+0xb5/0x200 fs/libfs.c:999
 ext4_sync_file+0xa45/0x1500 fs/ext4/fsync.c:120
 vfs_fsync_range+0x140/0x220 fs/sync.c:197
 generic_write_sync include/linux/fs.h:2796 [inline]
 dio_complete+0x75c/0x9e0 fs/direct-io.c:329
 dio_aio_complete_work+0x20/0x30 fs/direct-io.c:341
 process_one_work+0xc8b/0x1c40 kernel/workqueue.c:2153
 worker_thread+0x17f/0x1390 kernel/workqueue.c:2296
 kthread+0x35a/0x440 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (00000000eed30d76): kobject_uevent_env
kobject: 'loop2' (00000000eed30d76): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop0' (000000003e4448c9): kobject_uevent_env
kobject: 'loop0' (000000003e4448c9): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop0' (000000003e4448c9): kobject_uevent_env
kobject: 'loop0' (000000003e4448c9): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop1' (0000000016875a40): kobject_uevent_env
kobject: 'rx-0' (000000004d913eaf): kobject_cleanup, parent 00000000920c6221
kobject: 'loop1' (0000000016875a40): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'rx-0' (000000004d913eaf): auto cleanup 'remove' event
kobject: 'rx-0' (000000004d913eaf): kobject_uevent_env
kobject: 'rx-0' (000000004d913eaf): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'loop0' (000000003e4448c9): kobject_uevent_env
kobject: 'rx-0' (000000004d913eaf): auto cleanup kobject_del
kobject: 'rx-0' (000000004d913eaf): calling ktype release
kobject: 'rx-0': free name
kobject: 'tx-0' (00000000dccd199d): kobject_cleanup, parent 00000000920c6221
kobject: 'tx-0' (00000000dccd199d): auto cleanup 'remove' event
kobject: 'tx-0' (00000000dccd199d): kobject_uevent_env
kobject: 'tx-0' (00000000dccd199d): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'loop0' (000000003e4448c9): fill_kobj_path: path = '/devices/virtual/block/loop0'
kernel msg: ebtables bug: please report to author: entries_size too small
kobject: 'tx-0' (00000000dccd199d): auto cleanup kobject_del
kobject: 'tx-0' (00000000dccd199d): calling ktype release
kobject: 'tx-0': free name
kobject: 'queues' (00000000920c6221): kobject_cleanup, parent           (null)
kobject: 'queues' (00000000920c6221): calling ktype release
kobject: 'queues' (00000000920c6221): kset_release
kobject: 'loop0' (000000003e4448c9): kobject_uevent_env
kobject: 'loop0' (000000003e4448c9): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'queues': free name
kobject: 'ip6gre0' (00000000791b0dbc): kobject_uevent_env
kobject: 'ip6gre0' (00000000791b0dbc): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'loop0' (000000003e4448c9): kobject_uevent_env
kobject: 'loop0' (000000003e4448c9): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'ip6gre0' (00000000791b0dbc): kobject_cleanup, parent           (null)
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'ip6gre0' (00000000791b0dbc): auto cleanup 'remove' event
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'ip6gre0' (00000000791b0dbc): kobject_uevent_env
kobject: 'ip6gre0' (00000000791b0dbc): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'loop1' (0000000016875a40): kobject_uevent_env
kobject: 'loop1' (0000000016875a40): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'ip6gre0' (00000000791b0dbc): calling ktype release
kobject: 'ip6gre0': free name
kobject: 'rx-0' (000000003a89c4db): kobject_cleanup, parent 00000000be7a1154
kobject: 'rx-0' (000000003a89c4db): auto cleanup 'remove' event
kobject: 'loop0' (000000003e4448c9): kobject_uevent_env
kobject: 'rx-0' (000000003a89c4db): kobject_uevent_env
kobject: 'loop0' (000000003e4448c9): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'rx-0' (000000003a89c4db): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'rx-0' (000000003a89c4db): auto cleanup kobject_del
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'rx-0' (000000003a89c4db): calling ktype release
kobject: 'rx-0': free name
kobject: 'tx-0' (000000004ce949ef): kobject_cleanup, parent 00000000be7a1154
kobject: 'tx-0' (000000004ce949ef): auto cleanup 'remove' event
kobject: 'tx-0' (000000004ce949ef): kobject_uevent_env
kobject: 'tx-0' (000000004ce949ef): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-0' (000000004ce949ef): auto cleanup kobject_del
kobject: 'tx-0' (000000004ce949ef): calling ktype release
kobject: 'tx-0': free name
kobject: 'queues' (00000000be7a1154): kobject_cleanup, parent           (null)
kobject: 'queues' (00000000be7a1154): calling ktype release
kobject: 'queues' (00000000be7a1154): kset_release
kobject: 'queues': free name
kobject: 'ip6tnl0' (00000000aa058950): kobject_uevent_env
kobject: 'ip6tnl0' (00000000aa058950): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'loop2' (00000000eed30d76): kobject_uevent_env
kobject: 'loop2' (00000000eed30d76): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'ip6tnl0' (00000000aa058950): kobject_cleanup, parent           (null)
kobject: 'ip6tnl0' (00000000aa058950): auto cleanup 'remove' event
kobject: 'ip6tnl0' (00000000aa058950): kobject_uevent_env
kobject: 'ip6tnl0' (00000000aa058950): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'loop0' (000000003e4448c9): kobject_uevent_env
kobject: 'loop0' (000000003e4448c9): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'ip6tnl0' (00000000aa058950): calling ktype release
kobject: 'ip6tnl0': free name
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'rx-0' (00000000211d08c3): kobject_cleanup, parent 0000000055d64cec
kobject: 'loop0' (000000003e4448c9): kobject_uevent_env
kobject: 'loop0' (000000003e4448c9): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'rx-0' (00000000211d08c3): auto cleanup 'remove' event
kobject: 'rx-0' (00000000211d08c3): kobject_uevent_env
kobject: 'rx-0' (00000000211d08c3): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'rx-0' (00000000211d08c3): auto cleanup kobject_del
kobject: 'rx-0' (00000000211d08c3): calling ktype release
kobject: 'rx-0': free name
kobject: 'tx-0' (00000000f98a05ea): kobject_cleanup, parent 0000000055d64cec
kobject: 'tx-0' (00000000f98a05ea): auto cleanup 'remove' event
kobject: 'tx-0' (00000000f98a05ea): kobject_uevent_env
kobject: 'tx-0' (00000000f98a05ea): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-0' (00000000f98a05ea): auto cleanup kobject_del
kobject: 'tx-0' (00000000f98a05ea): calling ktype release
kobject: 'tx-0': free name
kobject: 'queues' (0000000055d64cec): kobject_cleanup, parent           (null)
kobject: 'queues' (0000000055d64cec): calling ktype release
kobject: 'queues' (0000000055d64cec): kset_release
kobject: 'queues': free name
kobject: 'sit0' (00000000f9c34efa): kobject_uevent_env
kobject: 'sit0' (00000000f9c34efa): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'sit0' (00000000f9c34efa): kobject_cleanup, parent           (null)
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'sit0' (00000000f9c34efa): auto cleanup 'remove' event
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'sit0' (00000000f9c34efa): kobject_uevent_env
kobject: 'sit0' (00000000f9c34efa): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'sit0' (00000000f9c34efa): calling ktype release
kobject: 'sit0': free name
kobject: 'rx-0' (0000000068878f2e): kobject_cleanup, parent 0000000056106a66
kobject: 'rx-0' (0000000068878f2e): auto cleanup 'remove' event
kobject: 'rx-0' (0000000068878f2e): kobject_uevent_env
kobject: 'rx-0' (0000000068878f2e): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'rx-0' (0000000068878f2e): auto cleanup kobject_del
kobject: 'rx-0' (0000000068878f2e): calling ktype release
kobject: 'rx-0': free name
kobject: 'tx-0' (0000000079a2d762): kobject_cleanup, parent 0000000056106a66
kobject: 'tx-0' (0000000079a2d762): auto cleanup 'remove' event
kobject: 'tx-0' (0000000079a2d762): kobject_uevent_env
kobject: 'tx-0' (0000000079a2d762): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-0' (0000000079a2d762): auto cleanup kobject_del
kobject: 'tx-0' (0000000079a2d762): calling ktype release
kobject: 'tx-0': free name
kobject: 'queues' (0000000056106a66): kobject_cleanup, parent           (null)
kobject: 'loop1' (0000000016875a40): kobject_uevent_env
kobject: 'queues' (0000000056106a66): calling ktype release
kobject: 'loop1' (0000000016875a40): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'queues' (0000000056106a66): kset_release
kobject: 'queues': free name
kobject: 'ip6_vti0' (0000000080f64745): kobject_uevent_env
kobject: 'ip6_vti0' (0000000080f64745): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'ip6_vti0' (0000000080f64745): kobject_cleanup, parent           (null)
kobject: 'ip6_vti0' (0000000080f64745): auto cleanup 'remove' event
kobject: 'ip6_vti0' (0000000080f64745): kobject_uevent_env
kobject: 'ip6_vti0' (0000000080f64745): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'ip6_vti0' (0000000080f64745): calling ktype release
kobject: 'ip6_vti0': free name
kobject: 'rx-0' (00000000af03b5d6): kobject_cleanup, parent 0000000098323b6c
kobject: 'rx-0' (00000000af03b5d6): auto cleanup 'remove' event
kobject: 'rx-0' (00000000af03b5d6): kobject_uevent_env
kobject: 'rx-0' (00000000af03b5d6): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'rx-0' (00000000af03b5d6): auto cleanup kobject_del
kobject: 'loop2' (00000000eed30d76): kobject_uevent_env
kobject: 'loop2' (00000000eed30d76): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'rx-0' (00000000af03b5d6): calling ktype release
kobject: 'rx-0': free name
kobject: 'tx-0' (000000009ae32391): kobject_cleanup, parent 0000000098323b6c
kobject: 'loop0' (000000003e4448c9): kobject_uevent_env
kobject: 'tx-0' (000000009ae32391): auto cleanup 'remove' event
kobject: 'loop0' (000000003e4448c9): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'tx-0' (000000009ae32391): kobject_uevent_env
kobject: 'tx-0' (000000009ae32391): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-0' (000000009ae32391): auto cleanup kobject_del
kobject: 'tx-0' (000000009ae32391): calling ktype release
kobject: 'loop0' (000000003e4448c9): kobject_uevent_env
kobject: 'tx-0': free name
kobject: 'queues' (0000000098323b6c): kobject_cleanup, parent           (null)
kobject: 'queues' (0000000098323b6c): calling ktype release
kobject: 'queues' (0000000098323b6c): kset_release
kobject: 'queues': free name
kobject: 'ip_vti0' (00000000d5294ae5): kobject_uevent_env
kobject: 'loop0' (000000003e4448c9): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'ip_vti0' (00000000d5294ae5): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'loop2' (00000000eed30d76): kobject_uevent_env
kobject: 'ip_vti0' (00000000d5294ae5): kobject_cleanup, parent           (null)
kobject: 'ip_vti0' (00000000d5294ae5): auto cleanup 'remove' event
kobject: 'ip_vti0' (00000000d5294ae5): kobject_uevent_env
kobject: 'loop2' (00000000eed30d76): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'ip_vti0' (00000000d5294ae5): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'ip_vti0' (00000000d5294ae5): calling ktype release
kobject: 'ip_vti0': free name
kobject: 'rx-0' (00000000e8d46b43): kobject_cleanup, parent 000000005a7a83b6
kobject: 'rx-0' (00000000e8d46b43): auto cleanup 'remove' event
kobject: 'rx-0' (00000000e8d46b43): kobject_uevent_env
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'rx-0' (00000000e8d46b43): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'rx-0' (00000000e8d46b43): auto cleanup kobject_del
kobject: 'rx-0' (00000000e8d46b43): calling ktype release
kobject: 'rx-0': free name
kobject: 'tx-0' (00000000cd1efd96): kobject_cleanup, parent 000000005a7a83b6
kobject: 'loop0' (000000003e4448c9): kobject_uevent_env
kobject: 'tx-0' (00000000cd1efd96): auto cleanup 'remove' event
kobject: 'tx-0' (00000000cd1efd96): kobject_uevent_env
kobject: 'loop0' (000000003e4448c9): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'tx-0' (00000000cd1efd96): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-0' (00000000cd1efd96): auto cleanup kobject_del
kobject: 'tx-0' (00000000cd1efd96): calling ktype release
kobject: 'tx-0': free name
kobject: 'queues' (000000005a7a83b6): kobject_cleanup, parent           (null)
kobject: 'queues' (000000005a7a83b6): calling ktype release
kobject: 'queues' (000000005a7a83b6): kset_release
kobject: 'queues': free name
kobject: 'erspan0' (000000000f025735): kobject_uevent_env
kobject: 'erspan0' (000000000f025735): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'loop1' (0000000016875a40): kobject_uevent_env
kobject: 'loop1' (0000000016875a40): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'erspan0' (000000000f025735): kobject_cleanup, parent           (null)
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'erspan0' (000000000f025735): auto cleanup 'remove' event
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'erspan0' (000000000f025735): kobject_uevent_env
kobject: 'erspan0' (000000000f025735): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'loop0' (000000003e4448c9): kobject_uevent_env
kobject: 'erspan0' (000000000f025735): calling ktype release
kobject: 'loop0' (000000003e4448c9): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'erspan0': free name
kobject: 'rx-0' (00000000890c2a6a): kobject_cleanup, parent 00000000f26d6759
kobject: 'rx-0' (00000000890c2a6a): auto cleanup 'remove' event
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'rx-0' (00000000890c2a6a): kobject_uevent_env
kobject: 'rx-0' (00000000890c2a6a): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'rx-0' (00000000890c2a6a): auto cleanup kobject_del
kobject: 'rx-0' (00000000890c2a6a): calling ktype release
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'rx-0': free name
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'tx-0' (00000000a7b4d527): kobject_cleanup, parent 00000000f26d6759
kobject: 'tx-0' (00000000a7b4d527): auto cleanup 'remove' event
kobject: 'loop2' (00000000eed30d76): kobject_uevent_env
kobject: 'tx-0' (00000000a7b4d527): kobject_uevent_env
kobject: 'loop2' (00000000eed30d76): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'tx-0' (00000000a7b4d527): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'loop1' (0000000016875a40): kobject_uevent_env
kobject: 'tx-0' (00000000a7b4d527): auto cleanup kobject_del
kobject: 'loop1' (0000000016875a40): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'tx-0' (00000000a7b4d527): calling ktype release
kobject: 'tx-0': free name
kobject: 'queues' (00000000f26d6759): kobject_cleanup, parent           (null)
kobject: 'loop0' (000000003e4448c9): kobject_uevent_env
kobject: 'queues' (00000000f26d6759): calling ktype release
kobject: 'loop0' (000000003e4448c9): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'queues' (00000000f26d6759): kset_release
kobject: 'queues': free name
kobject: 'gretap0' (000000004afc16c5): kobject_uevent_env
kobject: 'gretap0' (000000004afc16c5): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'loop2' (00000000eed30d76): kobject_uevent_env
kobject: 'loop2' (00000000eed30d76): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop0' (000000003e4448c9): kobject_uevent_env
kobject: 'loop0' (000000003e4448c9): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'gretap0' (000000004afc16c5): kobject_cleanup, parent           (null)
kobject: 'gretap0' (000000004afc16c5): auto cleanup 'remove' event
kobject: 'gretap0' (000000004afc16c5): kobject_uevent_env
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'gretap0' (000000004afc16c5): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'gretap0' (000000004afc16c5): calling ktype release
kobject: 'gretap0': free name
kobject: 'rx-0' (000000009093dad6): kobject_cleanup, parent 00000000e4499a9e
kobject: 'rx-0' (000000009093dad6): auto cleanup 'remove' event
kobject: 'loop0' (000000003e4448c9): kobject_uevent_env
kobject: 'rx-0' (000000009093dad6): kobject_uevent_env
kobject: 'rx-0' (000000009093dad6): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'rx-0' (000000009093dad6): auto cleanup kobject_del
kobject: 'rx-0' (000000009093dad6): calling ktype release
kobject: 'loop0' (000000003e4448c9): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'rx-0': free name
kobject: 'tx-0' (0000000000053370): kobject_cleanup, parent 00000000e4499a9e
kobject: 'loop2' (00000000eed30d76): kobject_uevent_env
kobject: 'tx-0' (0000000000053370): auto cleanup 'remove' event
kobject: 'loop2' (00000000eed30d76): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'tx-0' (0000000000053370): kobject_uevent_env
kobject: 'loop1' (0000000016875a40): kobject_uevent_env
kobject: 'tx-0' (0000000000053370): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'loop1' (0000000016875a40): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'tx-0' (0000000000053370): auto cleanup kobject_del
kobject: 'loop0' (000000003e4448c9): kobject_uevent_env
kobject: 'tx-0' (0000000000053370): calling ktype release
kobject: 'loop0' (000000003e4448c9): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'tx-0': free name
kobject: 'queues' (00000000e4499a9e): kobject_cleanup, parent           (null)
kobject: 'queues' (00000000e4499a9e): calling ktype release
kobject: 'queues' (00000000e4499a9e): kset_release
kobject: 'queues': free name
kobject: 'gre0' (00000000464cf727): kobject_uevent_env
kobject: 'gre0' (00000000464cf727): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'gre0' (00000000464cf727): kobject_cleanup, parent           (null)
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'gre0' (00000000464cf727): auto cleanup 'remove' event
kobject: 'gre0' (00000000464cf727): kobject_uevent_env
kobject: 'loop2' (00000000eed30d76): kobject_uevent_env
kobject: 'gre0' (00000000464cf727): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'loop2' (00000000eed30d76): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'gre0' (00000000464cf727): calling ktype release
kobject: 'gre0': free name
kobject: 'rx-0' (00000000dd8432cd): kobject_cleanup, parent 00000000712abddd
kobject: 'rx-0' (00000000dd8432cd): auto cleanup 'remove' event
kobject: 'rx-0' (00000000dd8432cd): kobject_uevent_env
kobject: 'loop0' (000000003e4448c9): kobject_uevent_env
kobject: 'rx-0' (00000000dd8432cd): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'rx-0' (00000000dd8432cd): auto cleanup kobject_del
kobject: 'rx-0' (00000000dd8432cd): calling ktype release
kobject: 'loop0' (000000003e4448c9): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'rx-0': free name
kobject: 'tx-0' (0000000029efcb0a): kobject_cleanup, parent 00000000712abddd
kobject: 'tx-0' (0000000029efcb0a): auto cleanup 'remove' event
kobject: 'tx-0' (0000000029efcb0a): kobject_uevent_env
kobject: 'tx-0' (0000000029efcb0a): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-0' (0000000029efcb0a): auto cleanup kobject_del
kobject: 'tx-0' (0000000029efcb0a): calling ktype release
kobject: 'tx-0': free name
kobject: 'queues' (00000000712abddd): kobject_cleanup, parent           (null)
kobject: 'queues' (00000000712abddd): calling ktype release
kobject: 'queues' (00000000712abddd): kset_release
kobject: 'queues': free name
kobject: 'tunl0' (000000007aa39a8a): kobject_uevent_env
kobject: 'tunl0' (000000007aa39a8a): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'loop0' (000000003e4448c9): kobject_uevent_env
kobject: 'loop0' (000000003e4448c9): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'tunl0' (000000007aa39a8a): kobject_cleanup, parent           (null)
kobject: 'tunl0' (000000007aa39a8a): auto cleanup 'remove' event
kobject: 'tunl0' (000000007aa39a8a): kobject_uevent_env
kobject: 'tunl0' (000000007aa39a8a): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tunl0' (000000007aa39a8a): calling ktype release
kobject: 'tunl0': free name
kobject: 'rx-0' (0000000041fb334e): kobject_cleanup, parent 00000000857f0cd8
kobject: 'rx-0' (0000000041fb334e): auto cleanup 'remove' event
kobject: 'rx-0' (0000000041fb334e): kobject_uevent_env
kobject: 'rx-0' (0000000041fb334e): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'loop2' (00000000eed30d76): kobject_uevent_env
kobject: 'rx-0' (0000000041fb334e): auto cleanup kobject_del
kobject: 'loop2' (00000000eed30d76): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'rx-0' (0000000041fb334e): calling ktype release
kobject: 'loop1' (0000000016875a40): kobject_uevent_env
kobject: 'rx-0': free name
kobject: 'tx-0' (0000000044a06bff): kobject_cleanup, parent 00000000857f0cd8
kobject: 'tx-0' (0000000044a06bff): auto cleanup 'remove' event
kobject: 'loop1' (0000000016875a40): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'tx-0' (0000000044a06bff): kobject_uevent_env
kobject: 'tx-0' (0000000044a06bff): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'tx-0' (0000000044a06bff): auto cleanup kobject_del
kobject: 'tx-0' (0000000044a06bff): calling ktype release
kobject: 'tx-0': free name
kobject: 'queues' (00000000857f0cd8): kobject_cleanup, parent           (null)
kobject: 'queues' (00000000857f0cd8): calling ktype release
kobject: 'queues' (00000000857f0cd8): kset_release
kobject: 'queues': free name
kobject: 'lo' (00000000a625f546): kobject_uevent_env
kobject: 'lo' (00000000a625f546): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'lo' (00000000a625f546): kobject_cleanup, parent           (null)
kobject: 'loop0' (000000003e4448c9): kobject_uevent_env
kobject: 'loop0' (000000003e4448c9): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'lo' (00000000a625f546): auto cleanup 'remove' event
kobject: 'lo' (00000000a625f546): kobject_uevent_env
kobject: 'lo' (00000000a625f546): kobject_uevent_env: uevent_suppress caused the event to drop!
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'lo' (00000000a625f546): calling ktype release
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'lo': free name
kobject: 'loop2' (00000000eed30d76): kobject_uevent_env
kobject: 'loop2' (00000000eed30d76): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop1' (0000000016875a40): kobject_uevent_env
kobject: 'loop1' (0000000016875a40): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (000000003e4448c9): kobject_uevent_env
kobject: 'loop0' (000000003e4448c9): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop2' (00000000eed30d76): kobject_uevent_env
kobject: 'loop2' (00000000eed30d76): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop1' (0000000016875a40): kobject_uevent_env
kobject: 'loop1' (0000000016875a40): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (000000003e4448c9): kobject_uevent_env
kobject: 'loop0' (000000003e4448c9): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (00000000eed30d76): kobject_uevent_env
kobject: 'loop2' (00000000eed30d76): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop1' (0000000016875a40): kobject_uevent_env
kobject: 'loop1' (0000000016875a40): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop2' (00000000eed30d76): kobject_uevent_env
kobject: 'loop2' (00000000eed30d76): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (000000003e4448c9): kobject_uevent_env
kobject: 'loop0' (000000003e4448c9): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (00000000eed30d76): kobject_uevent_env
kobject: 'loop2' (00000000eed30d76): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop1' (0000000016875a40): kobject_uevent_env
kobject: 'loop1' (0000000016875a40): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (000000003e4448c9): kobject_uevent_env
kobject: 'loop0' (000000003e4448c9): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (00000000eed30d76): kobject_uevent_env
kobject: 'loop2' (00000000eed30d76): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (000000003e4448c9): kobject_uevent_env
kobject: 'loop0' (000000003e4448c9): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop1' (0000000016875a40): kobject_uevent_env
kobject: 'loop1' (0000000016875a40): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (000000003e4448c9): kobject_uevent_env
kobject: 'loop0' (000000003e4448c9): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop2' (00000000eed30d76): kobject_uevent_env
kobject: 'loop2' (00000000eed30d76): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop1' (0000000016875a40): kobject_uevent_env
kobject: 'loop1' (0000000016875a40): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (000000003e4448c9): kobject_uevent_env
kobject: 'loop0' (000000003e4448c9): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop2' (00000000eed30d76): kobject_uevent_env
kobject: 'loop2' (00000000eed30d76): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (000000003e4448c9): kobject_uevent_env
kobject: 'loop0' (000000003e4448c9): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop2' (00000000eed30d76): kobject_uevent_env
kobject: 'loop2' (00000000eed30d76): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop1' (0000000016875a40): kobject_uevent_env
kobject: 'loop1' (0000000016875a40): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop4' (0000000056f74168): kobject_uevent_env
kobject: 'loop4' (0000000056f74168): fill_kobj_path: path = '/devices/virtual/block/loop4'