======================================================
WARNING: possible circular locking dependency detected
4.20.0-rc7+ #285 Not tainted
------------------------------------------------------
kworker/1:4/11968 is trying to acquire lock:
00000000777b80f4 (epmutex){+.+.}, at: ep_free+0xf6/0x300 fs/eventpoll.c:829
kobject: 'loop1' (00000000e388b298): kobject_uevent_env
but task is already holding lock:
0000000038939b56 ((delayed_fput_work).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:
kobject: 'loop1' (00000000e388b298): fill_kobj_path: path = '/devices/virtual/block/loop1'
-> #4 ((delayed_fput_work).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
-> #3 ((wq_completion)"events"){+.+.}:
flush_workqueue+0x30a/0x1e10 kernel/workqueue.c:2655
flush_scheduled_work include/linux/workqueue.h:599 [inline]
vim2m_stop_streaming+0x7c/0x2c0 drivers/media/platform/vim2m.c:811
__vb2_queue_cancel+0x14f/0xd50 drivers/media/common/videobuf2/videobuf2-core.c:1843
kobject: 'loop5' (0000000083599a82): kobject_uevent_env
vb2_core_queue_release+0x26/0x80 drivers/media/common/videobuf2/videobuf2-core.c:2255
vb2_queue_release+0x15/0x20 drivers/media/common/videobuf2/videobuf2-v4l2.c:842
v4l2_m2m_ctx_release+0x2a/0x35 drivers/media/v4l2-core/v4l2-mem2mem.c:931
vim2m_release+0xe6/0x150 drivers/media/platform/vim2m.c:977
v4l2_release+0x224/0x3a0 drivers/media/v4l2-core/v4l2-dev.c:456
__fput+0x385/0xa30 fs/file_table.c:278
____fput+0x15/0x20 fs/file_table.c:309
kobject: 'loop5' (0000000083599a82): fill_kobj_path: path = '/devices/virtual/block/loop5'
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_32_irqs_on arch/x86/entry/common.c:341 [inline]
do_fast_syscall_32+0xcd5/0xfb2 arch/x86/entry/common.c:397
entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
-> #2 (&dev->dev_mutex){+.+.}:
__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
v4l2_m2m_fop_poll+0x98/0x120 drivers/media/v4l2-core/v4l2-mem2mem.c:1105
v4l2_poll+0x153/0x200 drivers/media/v4l2-core/v4l2-dev.c:350
vfs_poll include/linux/poll.h:86 [inline]
ep_item_poll.isra.15+0x15c/0x400 fs/eventpoll.c:892
ep_insert+0x77e/0x1d40 fs/eventpoll.c:1464
__do_sys_epoll_ctl fs/eventpoll.c:2121 [inline]
__se_sys_epoll_ctl fs/eventpoll.c:2007 [inline]
__ia32_sys_epoll_ctl+0xeda/0x1080 fs/eventpoll.c:2007
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
Enabling of bearer <udp:syz2> rejected, failed to enable media
-> #1 (&ep->mtx){+.+.}:
__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
ep_free+0x160/0x300 fs/eventpoll.c:849
ep_eventpoll_release+0x44/0x60 fs/eventpoll.c:869
__fput+0x385/0xa30 fs/file_table.c:278
____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
-> #0 (epmutex){+.+.}:
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
ep_free+0xf6/0x300 fs/eventpoll.c:829
ep_eventpoll_release+0x44/0x60 fs/eventpoll.c:869
__fput+0x385/0xa30 fs/file_table.c:278
delayed_fput+0x55/0x80 fs/file_table.c:304
process_one_work+0xc90/0x1c40 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:
epmutex --> (wq_completion)"events" --> (delayed_fput_work).work
kobject: 'loop2' (0000000066dfaf71): kobject_uevent_env
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock((delayed_fput_work).work);
lock((wq_completion)"events");
lock((delayed_fput_work).work);
lock(epmutex);
*** DEADLOCK ***
2 locks held by kworker/1:4/11968:
#0: 000000003a571965 ((wq_completion)"events"){+.+.}, at: __write_once_size include/linux/compiler.h:218 [inline]
#0: 000000003a571965 ((wq_completion)"events"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: 000000003a571965 ((wq_completion)"events"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline]
#0: 000000003a571965 ((wq_completion)"events"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline]
#0: 000000003a571965 ((wq_completion)"events"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline]
#0: 000000003a571965 ((wq_completion)"events"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
#0: 000000003a571965 ((wq_completion)"events"){+.+.}, at: process_one_work+0xb43/0x1c40 kernel/workqueue.c:2124
kobject: 'loop2' (0000000066dfaf71): fill_kobj_path: path = '/devices/virtual/block/loop2'
#1: 0000000038939b56 ((delayed_fput_work).work){+.+.}, at: process_one_work+0xb9a/0x1c40 kernel/workqueue.c:2128
stack backtrace:
CPU: 1 PID: 11968 Comm: kworker/1:4 Not tainted 4.20.0-rc7+ #285
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events delayed_fput
Enabling of bearer <udp:syz2> rejected, failed to enable media
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
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: 'loop1' (00000000e388b298): kobject_uevent_env
kobject: 'loop1' (00000000e388b298): 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
Enabling of bearer <udp:syz2> rejected, failed to enable media
kobject: 'loop0' (000000002a48426d): kobject_uevent_env
mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
kobject: 'loop0' (000000002a48426d): fill_kobj_path: path = '/devices/virtual/block/loop0'
ep_free+0xf6/0x300 fs/eventpoll.c:829
ep_eventpoll_release+0x44/0x60 fs/eventpoll.c:869
__fput+0x385/0xa30 fs/file_table.c:278
delayed_fput+0x55/0x80 fs/file_table.c:304
process_one_work+0xc90/0x1c40 kernel/workqueue.c:2153
worker_thread+0x17f/0x1390 kernel/workqueue.c:2296
kobject: 'loop1' (00000000e388b298): kobject_uevent_env
kobject: 'loop1' (00000000e388b298): fill_kobj_path: path = '/devices/virtual/block/loop1'
kthread+0x35a/0x440 kernel/kthread.c:246
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000a185b07e): kobject_uevent_env
kobject: 'loop4' (00000000a185b07e): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (000000002a48426d): kobject_uevent_env
kobject: 'loop0' (000000002a48426d): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop5' (0000000083599a82): kobject_uevent_env
kobject: 'loop5' (0000000083599a82): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop2' (0000000066dfaf71): kobject_uevent_env
kobject: 'loop2' (0000000066dfaf71): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop1' (00000000e388b298): kobject_uevent_env
kobject: 'loop1' (00000000e388b298): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop0' (000000002a48426d): kobject_uevent_env
kobject: 'loop0' (000000002a48426d): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop2' (0000000066dfaf71): kobject_uevent_env
kobject: 'loop2' (0000000066dfaf71): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop5' (0000000083599a82): kobject_uevent_env
kobject: 'loop5' (0000000083599a82): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000a185b07e): kobject_uevent_env
kobject: 'loop4' (00000000a185b07e): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (000000002a48426d): kobject_uevent_env
kobject: 'loop0' (000000002a48426d): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop1' (00000000e388b298): kobject_uevent_env
kobject: 'loop1' (00000000e388b298): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop4' (00000000a185b07e): kobject_uevent_env
kobject: 'loop4' (00000000a185b07e): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop0' (000000002a48426d): kobject_uevent_env
kobject: 'loop0' (000000002a48426d): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop4' (00000000a185b07e): kobject_uevent_env
kobject: 'loop4' (00000000a185b07e): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop0' (000000002a48426d): kobject_uevent_env
kobject: 'loop0' (000000002a48426d): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop2' (0000000066dfaf71): kobject_uevent_env
kobject: 'loop2' (0000000066dfaf71): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop4' (00000000a185b07e): kobject_uevent_env
kobject: 'loop4' (00000000a185b07e): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (0000000066dfaf71): kobject_uevent_env
kobject: 'loop2' (0000000066dfaf71): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop5' (0000000083599a82): kobject_uevent_env
kobject: 'loop5' (0000000083599a82): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop1' (00000000e388b298): kobject_uevent_env
kobject: 'loop1' (00000000e388b298): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop0' (000000002a48426d): kobject_uevent_env
kobject: 'loop0' (000000002a48426d): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop2' (0000000066dfaf71): kobject_uevent_env
kobject: 'loop2' (0000000066dfaf71): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop1' (00000000e388b298): kobject_uevent_env
kobject: 'loop1' (00000000e388b298): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop5' (0000000083599a82): kobject_uevent_env
kobject: 'loop5' (0000000083599a82): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000a185b07e): kobject_uevent_env
kobject: 'loop4' (00000000a185b07e): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (0000000066dfaf71): kobject_uevent_env
kobject: 'loop2' (0000000066dfaf71): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop0' (000000002a48426d): kobject_uevent_env
kobject: 'loop0' (000000002a48426d): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop4' (00000000a185b07e): kobject_uevent_env
kobject: 'loop4' (00000000a185b07e): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop5' (0000000083599a82): kobject_uevent_env
kobject: 'loop5' (0000000083599a82): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop1' (00000000e388b298): kobject_uevent_env
kobject: 'loop1' (00000000e388b298): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop0' (000000002a48426d): kobject_uevent_env
kobject: 'loop0' (000000002a48426d): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop2' (0000000066dfaf71): kobject_uevent_env
kobject: 'loop2' (0000000066dfaf71): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop5' (0000000083599a82): kobject_uevent_env
kobject: 'loop5' (0000000083599a82): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000a185b07e): kobject_uevent_env
kobject: 'loop4' (00000000a185b07e): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop1' (00000000e388b298): kobject_uevent_env
kobject: 'loop1' (00000000e388b298): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop0' (000000002a48426d): kobject_uevent_env
kobject: 'loop0' (000000002a48426d): fill_kobj_path: path = '/devices/virtual/block/loop0'
(unnamed net_device) (uninitialized): option primary: mode dependency failed, not supported in mode balance-rr(0)
kobject: 'loop2' (0000000066dfaf71): kobject_uevent_env
kobject: 'loop2' (0000000066dfaf71): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
(unnamed net_device) (uninitialized): option primary: mode dependency failed, not supported in mode balance-rr(0)
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop5' (0000000083599a82): kobject_uevent_env
kobject: 'loop5' (0000000083599a82): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop1' (00000000e388b298): kobject_uevent_env
kobject: 'loop1' (00000000e388b298): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop2' (0000000066dfaf71): kobject_uevent_env
(unnamed net_device) (uninitialized): option primary: mode dependency failed, not supported in mode balance-rr(0)
kobject: 'loop2' (0000000066dfaf71): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop4' (00000000a185b07e): kobject_uevent_env
kobject: 'loop4' (00000000a185b07e): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop0' (000000002a48426d): kobject_uevent_env
kobject: 'loop0' (000000002a48426d): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop1' (00000000e388b298): kobject_uevent_env
kobject: 'loop1' (00000000e388b298): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop4' (00000000a185b07e): kobject_uevent_env
kobject: 'loop4' (00000000a185b07e): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (000000002a48426d): kobject_uevent_env
kobject: 'loop0' (000000002a48426d): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop1' (00000000e388b298): kobject_uevent_env
kobject: 'loop1' (00000000e388b298): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop0' (000000002a48426d): kobject_uevent_env
kobject: 'loop0' (000000002a48426d): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop4' (00000000a185b07e): kobject_uevent_env
kobject: 'loop4' (00000000a185b07e): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop5' (0000000083599a82): kobject_uevent_env
(unnamed net_device) (uninitialized): option primary: mode dependency failed, not supported in mode balance-rr(0)
kobject: 'loop5' (0000000083599a82): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop2' (0000000066dfaf71): kobject_uevent_env
kobject: 'loop2' (0000000066dfaf71): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop1' (00000000e388b298): kobject_uevent_env
kobject: 'loop1' (00000000e388b298): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop0' (000000002a48426d): kobject_uevent_env
kobject: 'loop0' (000000002a48426d): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000a185b07e): kobject_uevent_env
kobject: 'loop4' (00000000a185b07e): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (000000002a48426d): kobject_uevent_env
kobject: 'loop0' (000000002a48426d): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop1' (00000000e388b298): kobject_uevent_env
kobject: 'loop1' (00000000e388b298): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000a185b07e): kobject_uevent_env
kobject: 'loop4' (00000000a185b07e): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop5' (0000000083599a82): kobject_uevent_env
kobject: 'loop5' (0000000083599a82): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop2' (0000000066dfaf71): kobject_uevent_env
kobject: 'loop2' (0000000066dfaf71): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop1' (00000000e388b298): kobject_uevent_env
kobject: 'loop1' (00000000e388b298): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop0' (000000002a48426d): kobject_uevent_env
kobject: 'loop0' (000000002a48426d): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop4' (00000000a185b07e): kobject_uevent_env
kobject: 'loop4' (00000000a185b07e): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop1' (00000000e388b298): kobject_uevent_env
kobject: 'loop1' (00000000e388b298): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000a185b07e): kobject_uevent_env
kobject: 'loop4' (00000000a185b07e): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop1' (00000000e388b298): kobject_uevent_env
kobject: 'loop1' (00000000e388b298): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop5' (0000000083599a82): kobject_uevent_env
kobject: 'loop5' (0000000083599a82): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop2' (0000000066dfaf71): kobject_uevent_env
kobject: 'loop2' (0000000066dfaf71): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop1' (00000000e388b298): kobject_uevent_env
kobject: 'loop1' (00000000e388b298): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop4' (00000000a185b07e): kobject_uevent_env
kobject: 'loop4' (00000000a185b07e): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (000000002a48426d): kobject_uevent_env
kobject: 'loop0' (000000002a48426d): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop1' (00000000e388b298): kobject_uevent_env
kobject: 'loop1' (00000000e388b298): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000a185b07e): kobject_uevent_env
kobject: 'loop4' (00000000a185b07e): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop1' (00000000e388b298): kobject_uevent_env
kobject: 'loop1' (00000000e388b298): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop5' (0000000083599a82): kobject_uevent_env
kobject: 'loop5' (0000000083599a82): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000a185b07e): kobject_uevent_env
kobject: 'loop4' (00000000a185b07e): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop1' (00000000e388b298): kobject_uevent_env
kobject: 'loop1' (00000000e388b298): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop5' (0000000083599a82): kobject_uevent_env
kobject: 'loop5' (0000000083599a82): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop2' (0000000066dfaf71): kobject_uevent_env
kobject: 'loop2' (0000000066dfaf71): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop5' (0000000083599a82): kobject_uevent_env
kobject: 'loop5' (0000000083599a82): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop0' (000000002a48426d): kobject_uevent_env
kobject: 'loop0' (000000002a48426d): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop1' (00000000e388b298): kobject_uevent_env
kobject: 'loop1' (00000000e388b298): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop2' (0000000066dfaf71): kobject_uevent_env
kobject: 'loop2' (0000000066dfaf71): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop5' (0000000083599a82): kobject_uevent_env
kobject: 'loop5' (0000000083599a82): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000a185b07e): kobject_uevent_env
kobject: 'loop4' (00000000a185b07e): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop2' (0000000066dfaf71): kobject_uevent_env
kobject: 'loop2' (0000000066dfaf71): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop5' (0000000083599a82): kobject_uevent_env
kobject: 'loop5' (0000000083599a82): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000a185b07e): kobject_uevent_env
kobject: 'loop4' (00000000a185b07e): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop1' (00000000e388b298): kobject_uevent_env
kobject: 'loop1' (00000000e388b298): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop0' (000000002a48426d): kobject_uevent_env
kobject: 'loop0' (000000002a48426d): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop4' (00000000a185b07e): kobject_uevent_env
xt_helper: cannot load conntrack support for proto=7
kobject: 'loop4' (00000000a185b07e): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop5' (0000000083599a82): kobject_uevent_env
kobject: 'loop5' (0000000083599a82): fill_kobj_path: path = '/devices/virtual/block/loop5'
xt_helper: cannot load conntrack support for proto=7
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000a185b07e): kobject_uevent_env
kobject: 'loop4' (00000000a185b07e): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (000000002a48426d): kobject_uevent_env
xt_helper: cannot load conntrack support for proto=7
kobject: 'loop0' (000000002a48426d): fill_kobj_path: path = '/devices/virtual/block/loop0'
xt_helper: cannot load conntrack support for proto=7
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop1' (00000000e388b298): kobject_uevent_env
kobject: 'loop1' (00000000e388b298): fill_kobj_path: path = '/devices/virtual/block/loop1'
xt_helper: cannot load conntrack support for proto=7
kobject: 'loop5' (0000000083599a82): kobject_uevent_env
kobject: 'loop5' (0000000083599a82): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000a185b07e): kobject_uevent_env
kobject: 'loop4' (00000000a185b07e): fill_kobj_path: path = '/devices/virtual/block/loop4'
xt_helper: cannot load conntrack support for proto=7
kobject: 'loop0' (000000002a48426d): kobject_uevent_env
xt_helper: cannot load conntrack support for proto=7
kobject: 'loop0' (000000002a48426d): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop1' (00000000e388b298): kobject_uevent_env
kobject: 'loop1' (00000000e388b298): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop4' (00000000a185b07e): kobject_uevent_env
kobject: 'loop4' (00000000a185b07e): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (0000000066dfaf71): kobject_uevent_env
kobject: 'loop2' (0000000066dfaf71): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000a185b07e): kobject_uevent_env
kobject: 'loop4' (00000000a185b07e): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop1' (00000000e388b298): kobject_uevent_env
kobject: 'loop1' (00000000e388b298): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop0' (000000002a48426d): kobject_uevent_env
kobject: 'loop0' (000000002a48426d): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop2' (0000000066dfaf71): kobject_uevent_env
kobject: 'loop2' (0000000066dfaf71): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop4' (00000000a185b07e): kobject_uevent_env
kobject: 'loop4' (00000000a185b07e): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (000000002a48426d): kobject_uevent_env
kobject: 'loop0' (000000002a48426d): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop1' (00000000e388b298): kobject_uevent_env
kobject: 'loop1' (00000000e388b298): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop2' (0000000066dfaf71): kobject_uevent_env
kobject: 'loop2' (0000000066dfaf71): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop2' (0000000066dfaf71): kobject_uevent_env
kobject: 'loop2' (0000000066dfaf71): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop0' (000000002a48426d): kobject_uevent_env
kobject: 'loop0' (000000002a48426d): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop2' (0000000066dfaf71): kobject_uevent_env
kobject: 'loop2' (0000000066dfaf71): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop0' (000000002a48426d): kobject_uevent_env
kobject: 'loop0' (000000002a48426d): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop2' (0000000066dfaf71): kobject_uevent_env
kobject: 'loop2' (0000000066dfaf71): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
xt_helper: cannot load conntrack support for proto=7
kobject: 'loop3' (000000000f93afa5): kobject_uevent_env
kobject: 'loop3' (000000000f93afa5): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop1' (00000000e388b298): kobject_uevent_env
kobject: 'loop1' (00000000e388b298): fill_kobj_path: path = '/devices/virtual/block/loop1'