IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
8021q: adding VLAN 0 to HW filter on device batadv0
8021q: adding VLAN 0 to HW filter on device batadv0
=====================================================
WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected
kobject: 'loop3' (00000000631236d9): kobject_uevent_env
5.0.0-rc3+ #48 Not tainted
-----------------------------------------------------
syz-executor2/8206 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
0000000078655a67 (&ctx->fd_wqh){....}, at: spin_lock include/linux/spinlock.h:329 [inline]
0000000078655a67 (&ctx->fd_wqh){....}, at: aio_poll+0x7b9/0x14e0 fs/aio.c:1772

and this task is already holding:
000000006f2fe873 (&(&ctx->ctx_lock)->rlock){..-.}, at: spin_lock_irq include/linux/spinlock.h:354 [inline]
000000006f2fe873 (&(&ctx->ctx_lock)->rlock){..-.}, at: aio_poll+0x790/0x14e0 fs/aio.c:1771
kobject: 'loop3' (00000000631236d9): fill_kobj_path: path = '/devices/virtual/block/loop3'
which would create a new lock dependency:
 (&(&ctx->ctx_lock)->rlock){..-.} -> (&ctx->fd_wqh){....}

but this new dependency connects a SOFTIRQ-irq-safe lock:
 (&(&ctx->ctx_lock)->rlock){..-.}

... which became SOFTIRQ-irq-safe at:
  lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3841
  __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline]
  _raw_spin_lock_irq+0x60/0x80 kernel/locking/spinlock.c:160
  spin_lock_irq include/linux/spinlock.h:354 [inline]
  free_ioctx_users+0xa7/0x6e0 fs/aio.c:610
  percpu_ref_put_many include/linux/percpu-refcount.h:285 [inline]
  percpu_ref_put include/linux/percpu-refcount.h:301 [inline]
  percpu_ref_call_confirm_rcu lib/percpu-refcount.c:123 [inline]
  percpu_ref_switch_to_atomic_rcu+0x50c/0x6b0 lib/percpu-refcount.c:158
  __rcu_reclaim kernel/rcu/rcu.h:240 [inline]
  rcu_do_batch kernel/rcu/tree.c:2452 [inline]
  invoke_rcu_callbacks kernel/rcu/tree.c:2773 [inline]
  rcu_process_callbacks+0xc4a/0x1680 kernel/rcu/tree.c:2754
  __do_softirq+0x30b/0xb11 kernel/softirq.c:292
  invoke_softirq kernel/softirq.c:373 [inline]
  irq_exit+0x180/0x1d0 kernel/softirq.c:413
  exiting_irq arch/x86/include/asm/apic.h:536 [inline]
  smp_apic_timer_interrupt+0x1b7/0x760 arch/x86/kernel/apic/apic.c:1062
  apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
  arch_local_irq_restore arch/x86/include/asm/paravirt.h:766 [inline]
  __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
  _raw_spin_unlock_irqrestore+0x95/0xe0 kernel/locking/spinlock.c:184
  unlock_hrtimer_base kernel/time/hrtimer.c:878 [inline]
  hrtimer_start_range_ns+0x6ae/0xda0 kernel/time/hrtimer.c:1109
  hrtimer_start_expires include/linux/hrtimer.h:409 [inline]
  do_nanosleep+0x1a2/0x750 kernel/time/hrtimer.c:1676
  hrtimer_nanosleep+0x2e4/0x640 kernel/time/hrtimer.c:1733
  __do_compat_sys_nanosleep kernel/time/hrtimer.c:1787 [inline]
  __se_compat_sys_nanosleep kernel/time/hrtimer.c:1774 [inline]
  __ia32_compat_sys_nanosleep+0x1e7/0x280 kernel/time/hrtimer.c:1774
  do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
  do_fast_syscall_32+0x333/0xf98 arch/x86/entry/common.c:397
  entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139

to a SOFTIRQ-irq-unsafe lock:
 (&ctx->fault_pending_wqh){+.+.}

... which became SOFTIRQ-irq-unsafe at:
...
  lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3841
  __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
  _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144
  spin_lock include/linux/spinlock.h:329 [inline]
  userfaultfd_release+0x609/0x8c0 fs/userfaultfd.c:916
  __fput+0x3c5/0xb10 fs/file_table.c:278
  ____fput+0x16/0x20 fs/file_table.c:309
  task_work_run+0x1f4/0x2b0 kernel/task_work.c:113
  get_signal+0x168d/0x19b0 kernel/signal.c:2347
  do_signal+0x91/0x1ea0 arch/x86/kernel/signal.c:816
  exit_to_usermode_loop+0x2f7/0x3b0 arch/x86/entry/common.c:162
  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+0xc97/0xf98 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:
  &(&ctx->ctx_lock)->rlock --> &ctx->fd_wqh --> &ctx->fault_pending_wqh

 Possible interrupt unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&ctx->fault_pending_wqh);
                               local_irq_disable();
                               lock(&(&ctx->ctx_lock)->rlock);
                               lock(&ctx->fd_wqh);
  <Interrupt>
    lock(&(&ctx->ctx_lock)->rlock);

 *** DEADLOCK ***

1 lock held by syz-executor2/8206:
 #0: 000000006f2fe873 (&(&ctx->ctx_lock)->rlock){..-.}, at: spin_lock_irq include/linux/spinlock.h:354 [inline]
 #0: 000000006f2fe873 (&(&ctx->ctx_lock)->rlock){..-.}, at: aio_poll+0x790/0x14e0 fs/aio.c:1771

the dependencies between SOFTIRQ-irq-safe lock and the holding lock:
-> (&(&ctx->ctx_lock)->rlock){..-.} {
   IN-SOFTIRQ-W at:
                    lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3841
                    __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline]
                    _raw_spin_lock_irq+0x60/0x80 kernel/locking/spinlock.c:160
                    spin_lock_irq include/linux/spinlock.h:354 [inline]
                    free_ioctx_users+0xa7/0x6e0 fs/aio.c:610
                    percpu_ref_put_many include/linux/percpu-refcount.h:285 [inline]
                    percpu_ref_put include/linux/percpu-refcount.h:301 [inline]
                    percpu_ref_call_confirm_rcu lib/percpu-refcount.c:123 [inline]
                    percpu_ref_switch_to_atomic_rcu+0x50c/0x6b0 lib/percpu-refcount.c:158
                    __rcu_reclaim kernel/rcu/rcu.h:240 [inline]
                    rcu_do_batch kernel/rcu/tree.c:2452 [inline]
                    invoke_rcu_callbacks kernel/rcu/tree.c:2773 [inline]
                    rcu_process_callbacks+0xc4a/0x1680 kernel/rcu/tree.c:2754
                    __do_softirq+0x30b/0xb11 kernel/softirq.c:292
                    invoke_softirq kernel/softirq.c:373 [inline]
                    irq_exit+0x180/0x1d0 kernel/softirq.c:413
                    exiting_irq arch/x86/include/asm/apic.h:536 [inline]
                    smp_apic_timer_interrupt+0x1b7/0x760 arch/x86/kernel/apic/apic.c:1062
                    apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
                    arch_local_irq_restore arch/x86/include/asm/paravirt.h:766 [inline]
                    __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
                    _raw_spin_unlock_irqrestore+0x95/0xe0 kernel/locking/spinlock.c:184
                    unlock_hrtimer_base kernel/time/hrtimer.c:878 [inline]
                    hrtimer_start_range_ns+0x6ae/0xda0 kernel/time/hrtimer.c:1109
                    hrtimer_start_expires include/linux/hrtimer.h:409 [inline]
                    do_nanosleep+0x1a2/0x750 kernel/time/hrtimer.c:1676
                    hrtimer_nanosleep+0x2e4/0x640 kernel/time/hrtimer.c:1733
                    __do_compat_sys_nanosleep kernel/time/hrtimer.c:1787 [inline]
                    __se_compat_sys_nanosleep kernel/time/hrtimer.c:1774 [inline]
                    __ia32_compat_sys_nanosleep+0x1e7/0x280 kernel/time/hrtimer.c:1774
                    do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
                    do_fast_syscall_32+0x333/0xf98 arch/x86/entry/common.c:397
                    entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
   INITIAL USE at:
                   lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3841
                   __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline]
                   _raw_spin_lock_irq+0x60/0x80 kernel/locking/spinlock.c:160
                   spin_lock_irq include/linux/spinlock.h:354 [inline]
                   free_ioctx_users+0xa7/0x6e0 fs/aio.c:610
                   percpu_ref_put_many include/linux/percpu-refcount.h:285 [inline]
                   percpu_ref_put include/linux/percpu-refcount.h:301 [inline]
                   percpu_ref_call_confirm_rcu lib/percpu-refcount.c:123 [inline]
                   percpu_ref_switch_to_atomic_rcu+0x50c/0x6b0 lib/percpu-refcount.c:158
                   __rcu_reclaim kernel/rcu/rcu.h:240 [inline]
                   rcu_do_batch kernel/rcu/tree.c:2452 [inline]
                   invoke_rcu_callbacks kernel/rcu/tree.c:2773 [inline]
                   rcu_process_callbacks+0xc4a/0x1680 kernel/rcu/tree.c:2754
                   __do_softirq+0x30b/0xb11 kernel/softirq.c:292
                   invoke_softirq kernel/softirq.c:373 [inline]
                   irq_exit+0x180/0x1d0 kernel/softirq.c:413
                   exiting_irq arch/x86/include/asm/apic.h:536 [inline]
                   smp_apic_timer_interrupt+0x1b7/0x760 arch/x86/kernel/apic/apic.c:1062
                   apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
                   arch_local_irq_restore arch/x86/include/asm/paravirt.h:766 [inline]
                   __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
                   _raw_spin_unlock_irqrestore+0x95/0xe0 kernel/locking/spinlock.c:184
                   unlock_hrtimer_base kernel/time/hrtimer.c:878 [inline]
                   hrtimer_start_range_ns+0x6ae/0xda0 kernel/time/hrtimer.c:1109
                   hrtimer_start_expires include/linux/hrtimer.h:409 [inline]
                   do_nanosleep+0x1a2/0x750 kernel/time/hrtimer.c:1676
                   hrtimer_nanosleep+0x2e4/0x640 kernel/time/hrtimer.c:1733
                   __do_compat_sys_nanosleep kernel/time/hrtimer.c:1787 [inline]
                   __se_compat_sys_nanosleep kernel/time/hrtimer.c:1774 [inline]
                   __ia32_compat_sys_nanosleep+0x1e7/0x280 kernel/time/hrtimer.c:1774
                   do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
                   do_fast_syscall_32+0x333/0xf98 arch/x86/entry/common.c:397
                   entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
 }
 ... key      at: [<ffffffff8b58d0a0>] __key.51949+0x0/0x40
 ... acquired at:
   lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3841
   __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
   _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144
   spin_lock include/linux/spinlock.h:329 [inline]
   aio_poll+0x7b9/0x14e0 fs/aio.c:1772
   __io_submit_one fs/aio.c:1875 [inline]
   io_submit_one+0xc39/0x1050 fs/aio.c:1908
   __do_compat_sys_io_submit fs/aio.c:1995 [inline]
   __se_compat_sys_io_submit fs/aio.c:1965 [inline]
   __ia32_compat_sys_io_submit+0x1c5/0x5c0 fs/aio.c:1965
   do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
   do_fast_syscall_32+0x333/0xf98 arch/x86/entry/common.c:397
   entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139


the dependencies between the lock to be acquired
 and SOFTIRQ-irq-unsafe lock:
 -> (&ctx->fault_pending_wqh){+.+.} {
    HARDIRQ-ON-W at:
                      lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3841
                      __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
                      _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144
                      spin_lock include/linux/spinlock.h:329 [inline]
                      userfaultfd_release+0x609/0x8c0 fs/userfaultfd.c:916
                      __fput+0x3c5/0xb10 fs/file_table.c:278
                      ____fput+0x16/0x20 fs/file_table.c:309
                      task_work_run+0x1f4/0x2b0 kernel/task_work.c:113
                      get_signal+0x168d/0x19b0 kernel/signal.c:2347
                      do_signal+0x91/0x1ea0 arch/x86/kernel/signal.c:816
                      exit_to_usermode_loop+0x2f7/0x3b0 arch/x86/entry/common.c:162
                      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+0xc97/0xf98 arch/x86/entry/common.c:397
                      entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
    SOFTIRQ-ON-W at:
                      lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3841
                      __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
                      _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144
                      spin_lock include/linux/spinlock.h:329 [inline]
                      userfaultfd_release+0x609/0x8c0 fs/userfaultfd.c:916
                      __fput+0x3c5/0xb10 fs/file_table.c:278
                      ____fput+0x16/0x20 fs/file_table.c:309
                      task_work_run+0x1f4/0x2b0 kernel/task_work.c:113
                      get_signal+0x168d/0x19b0 kernel/signal.c:2347
                      do_signal+0x91/0x1ea0 arch/x86/kernel/signal.c:816
                      exit_to_usermode_loop+0x2f7/0x3b0 arch/x86/entry/common.c:162
                      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+0xc97/0xf98 arch/x86/entry/common.c:397
                      entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
    INITIAL USE at:
                     lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3841
                     __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
                     _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144
                     spin_lock include/linux/spinlock.h:329 [inline]
                     userfaultfd_ctx_read+0x690/0x2060 fs/userfaultfd.c:1040
                     userfaultfd_read+0x1e0/0x2c0 fs/userfaultfd.c:1198
                     __vfs_read+0x116/0xb20 fs/read_write.c:416
                     vfs_read+0x194/0x3e0 fs/read_write.c:452
                     ksys_read+0x105/0x260 fs/read_write.c:578
                     __do_sys_read fs/read_write.c:588 [inline]
                     __se_sys_read fs/read_write.c:586 [inline]
                     __ia32_sys_read+0x71/0xb0 fs/read_write.c:586
                     do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
                     do_fast_syscall_32+0x333/0xf98 arch/x86/entry/common.c:397
                     entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
  }
  ... key      at: [<ffffffff8b58cee0>] __key.44850+0x0/0x40
  ... acquired at:
   __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
   _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144
   spin_lock include/linux/spinlock.h:329 [inline]
   userfaultfd_ctx_read+0x690/0x2060 fs/userfaultfd.c:1040
   userfaultfd_read+0x1e0/0x2c0 fs/userfaultfd.c:1198
   __vfs_read+0x116/0xb20 fs/read_write.c:416
   vfs_read+0x194/0x3e0 fs/read_write.c:452
   ksys_read+0x105/0x260 fs/read_write.c:578
   __do_sys_read fs/read_write.c:588 [inline]
   __se_sys_read fs/read_write.c:586 [inline]
   __ia32_sys_read+0x71/0xb0 fs/read_write.c:586
   do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
   do_fast_syscall_32+0x333/0xf98 arch/x86/entry/common.c:397
   entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139

-> (&ctx->fd_wqh){....} {
   INITIAL USE at:
                   lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3841
                   __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline]
                   _raw_spin_lock_irq+0x60/0x80 kernel/locking/spinlock.c:160
                   spin_lock_irq include/linux/spinlock.h:354 [inline]
                   userfaultfd_ctx_read+0x25e/0x2060 fs/userfaultfd.c:1036
                   userfaultfd_read+0x1e0/0x2c0 fs/userfaultfd.c:1198
                   __vfs_read+0x116/0xb20 fs/read_write.c:416
                   vfs_read+0x194/0x3e0 fs/read_write.c:452
                   ksys_read+0x105/0x260 fs/read_write.c:578
                   __do_sys_read fs/read_write.c:588 [inline]
                   __se_sys_read fs/read_write.c:586 [inline]
                   __ia32_sys_read+0x71/0xb0 fs/read_write.c:586
                   do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
                   do_fast_syscall_32+0x333/0xf98 arch/x86/entry/common.c:397
                   entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
 }
 ... key      at: [<ffffffff8b58ce20>] __key.44853+0x0/0x40
 ... acquired at:
   lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3841
   __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
   _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144
   spin_lock include/linux/spinlock.h:329 [inline]
   aio_poll+0x7b9/0x14e0 fs/aio.c:1772
   __io_submit_one fs/aio.c:1875 [inline]
   io_submit_one+0xc39/0x1050 fs/aio.c:1908
   __do_compat_sys_io_submit fs/aio.c:1995 [inline]
   __se_compat_sys_io_submit fs/aio.c:1965 [inline]
   __ia32_compat_sys_io_submit+0x1c5/0x5c0 fs/aio.c:1965
   do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
   do_fast_syscall_32+0x333/0xf98 arch/x86/entry/common.c:397
   entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139


stack backtrace:
CPU: 1 PID: 8206 Comm: syz-executor2 Not tainted 5.0.0-rc3+ #48
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+0x1db/0x2d0 lib/dump_stack.c:113
 print_bad_irq_dependency kernel/locking/lockdep.c:1573 [inline]
 check_usage.cold+0x5e2/0x917 kernel/locking/lockdep.c:1605
 check_irq_usage kernel/locking/lockdep.c:1661 [inline]
 check_prev_add_irq kernel/locking/lockdep_states.h:8 [inline]
 check_prev_add kernel/locking/lockdep.c:1871 [inline]
 check_prevs_add kernel/locking/lockdep.c:1979 [inline]
 validate_chain kernel/locking/lockdep.c:2350 [inline]
 __lock_acquire+0x2169/0x4a30 kernel/locking/lockdep.c:3338
 lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3841
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144
 spin_lock include/linux/spinlock.h:329 [inline]
 aio_poll+0x7b9/0x14e0 fs/aio.c:1772
 __io_submit_one fs/aio.c:1875 [inline]
 io_submit_one+0xc39/0x1050 fs/aio.c:1908
 __do_compat_sys_io_submit fs/aio.c:1995 [inline]
 __se_compat_sys_io_submit fs/aio.c:1965 [inline]
 __ia32_compat_sys_io_submit+0x1c5/0x5c0 fs/aio.c:1965
 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
 do_fast_syscall_32+0x333/0xf98 arch/x86/entry/common.c:397
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7f5e869
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:00000000f7ed50cc EFLAGS: 00000296 ORIG_RAX: 00000000000000f8
RAX: ffffffffffffffda RBX: 00000000f7f18000 RCX: 0000000000000001
RDX: 0000000020000600 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
kobject: 'loop5' (0000000054021b11): kobject_uevent_env
kobject: 'loop5' (0000000054021b11): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop2' (0000000041d5a236): kobject_uevent_env
kobject: 'loop2' (0000000041d5a236): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop1' (00000000fdd75042): kobject_uevent_env
kobject: 'loop1' (00000000fdd75042): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop3' (00000000631236d9): kobject_uevent_env
kobject: 'loop3' (00000000631236d9): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop4' (000000005169dc26): kobject_uevent_env