hrtimer: interrupt took 683171 ns ===================================================== WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected 4.20.0-rc5+ #140 Not tainted ----------------------------------------------------- syz-executor0/11441 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: 00000000c967b832 (&ctx->fd_wqh){....}, at: spin_lock include/linux/spinlock.h:329 [inline] 00000000c967b832 (&ctx->fd_wqh){....}, at: aio_poll+0x760/0x1420 fs/aio.c:1748 and this task is already holding: 00000000901b9beb (&(&ctx->ctx_lock)->rlock){..-.}, at: spin_lock_irq include/linux/spinlock.h:354 [inline] 00000000901b9beb (&(&ctx->ctx_lock)->rlock){..-.}, at: aio_poll+0x738/0x1420 fs/aio.c:1747 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+0x1ed/0x520 kernel/locking/lockdep.c:3844 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline] _raw_spin_lock_irq+0x61/0x80 kernel/locking/spinlock.c:160 spin_lock_irq include/linux/spinlock.h:354 [inline] free_ioctx_users+0xbc/0x710 fs/aio.c:603 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+0x563/0x730 lib/percpu-refcount.c:158 __rcu_reclaim kernel/rcu/rcu.h:240 [inline] rcu_do_batch kernel/rcu/tree.c:2437 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2716 [inline] rcu_process_callbacks+0x100a/0x1ac0 kernel/rcu/tree.c:2697 __do_softirq+0x308/0xb7e kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 to a SOFTIRQ-irq-unsafe lock: (&ctx->fault_pending_wqh){+.+.} ... which became SOFTIRQ-irq-unsafe at: ... lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] userfaultfd_release+0x63e/0x8d0 fs/userfaultfd.c:909 __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 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); lock(&(&ctx->ctx_lock)->rlock); *** DEADLOCK *** 1 lock held by syz-executor0/11441: #0: 00000000901b9beb (&(&ctx->ctx_lock)->rlock){..-.}, at: spin_lock_irq include/linux/spinlock.h:354 [inline] #0: 00000000901b9beb (&(&ctx->ctx_lock)->rlock){..-.}, at: aio_poll+0x738/0x1420 fs/aio.c:1747 the dependencies between SOFTIRQ-irq-safe lock and the holding lock: -> (&(&ctx->ctx_lock)->rlock){..-.} { IN-SOFTIRQ-W at: lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline] _raw_spin_lock_irq+0x61/0x80 kernel/locking/spinlock.c:160 spin_lock_irq include/linux/spinlock.h:354 [inline] free_ioctx_users+0xbc/0x710 fs/aio.c:603 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+0x563/0x730 lib/percpu-refcount.c:158 __rcu_reclaim kernel/rcu/rcu.h:240 [inline] rcu_do_batch kernel/rcu/tree.c:2437 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2716 [inline] rcu_process_callbacks+0x100a/0x1ac0 kernel/rcu/tree.c:2697 __do_softirq+0x308/0xb7e kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 INITIAL USE at: lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline] _raw_spin_lock_irq+0x61/0x80 kernel/locking/spinlock.c:160 spin_lock_irq include/linux/spinlock.h:354 [inline] free_ioctx_users+0xbc/0x710 fs/aio.c:603 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+0x563/0x730 lib/percpu-refcount.c:158 __rcu_reclaim kernel/rcu/rcu.h:240 [inline] rcu_do_batch kernel/rcu/tree.c:2437 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2716 [inline] rcu_process_callbacks+0x100a/0x1ac0 kernel/rcu/tree.c:2697 __do_softirq+0x308/0xb7e kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 } ... key at: [] __key.51053+0x0/0x40 ... acquired at: lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] aio_poll+0x760/0x1420 fs/aio.c:1748 io_submit_one+0xa49/0xf80 fs/aio.c:1851 __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 the dependencies between the lock to be acquired and SOFTIRQ-irq-unsafe lock: -> (&ctx->fault_pending_wqh){+.+.} { HARDIRQ-ON-W at: lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] userfaultfd_release+0x63e/0x8d0 fs/userfaultfd.c:909 __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 SOFTIRQ-ON-W at: lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] userfaultfd_release+0x63e/0x8d0 fs/userfaultfd.c:909 __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 INITIAL USE at: lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] userfaultfd_ctx_read+0x4f3/0x2180 fs/userfaultfd.c:1033 userfaultfd_read+0x1e2/0x2c0 fs/userfaultfd.c:1191 __vfs_read+0x117/0x9b0 fs/read_write.c:416 vfs_read+0x17f/0x3c0 fs/read_write.c:452 ksys_read+0x101/0x260 fs/read_write.c:578 __do_sys_read fs/read_write.c:588 [inline] __se_sys_read fs/read_write.c:586 [inline] __x64_sys_read+0x73/0xb0 fs/read_write.c:586 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe } ... key at: [] __key.44661+0x0/0x40 ... acquired at: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] userfaultfd_ctx_read+0x4f3/0x2180 fs/userfaultfd.c:1033 userfaultfd_read+0x1e2/0x2c0 fs/userfaultfd.c:1191 __vfs_read+0x117/0x9b0 fs/read_write.c:416 vfs_read+0x17f/0x3c0 fs/read_write.c:452 ksys_read+0x101/0x260 fs/read_write.c:578 __do_sys_read fs/read_write.c:588 [inline] __se_sys_read fs/read_write.c:586 [inline] __x64_sys_read+0x73/0xb0 fs/read_write.c:586 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> (&ctx->fd_wqh){....} { INITIAL USE at: lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline] _raw_spin_lock_irq+0x61/0x80 kernel/locking/spinlock.c:160 spin_lock_irq include/linux/spinlock.h:354 [inline] userfaultfd_ctx_read+0x2e4/0x2180 fs/userfaultfd.c:1029 userfaultfd_read+0x1e2/0x2c0 fs/userfaultfd.c:1191 __vfs_read+0x117/0x9b0 fs/read_write.c:416 vfs_read+0x17f/0x3c0 fs/read_write.c:452 ksys_read+0x101/0x260 fs/read_write.c:578 __do_sys_read fs/read_write.c:588 [inline] __se_sys_read fs/read_write.c:586 [inline] __x64_sys_read+0x73/0xb0 fs/read_write.c:586 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe } ... key at: [] __key.44664+0x0/0x40 ... acquired at: lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] aio_poll+0x760/0x1420 fs/aio.c:1748 io_submit_one+0xa49/0xf80 fs/aio.c:1851 __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 stack backtrace: CPU: 1 PID: 11441 Comm: syz-executor0 Not tainted 4.20.0-rc5+ #140 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+0x244/0x39d lib/dump_stack.c:113 print_bad_irq_dependency kernel/locking/lockdep.c:1570 [inline] check_usage.cold.58+0x6d5/0xad1 kernel/locking/lockdep.c:1602 check_irq_usage kernel/locking/lockdep.c:1658 [inline] check_prev_add_irq kernel/locking/lockdep_states.h:8 [inline] check_prev_add kernel/locking/lockdep.c:1868 [inline] check_prevs_add kernel/locking/lockdep.c:1976 [inline] validate_chain kernel/locking/lockdep.c:2347 [inline] __lock_acquire+0x238a/0x4c20 kernel/locking/lockdep.c:3341 lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] aio_poll+0x760/0x1420 fs/aio.c:1748 io_submit_one+0xa49/0xf80 fs/aio.c:1851 __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 RIP: 0033:0x457569 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f5650f14c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569 RDX: 0000000020000b00 RSI: 0000000000000001 RDI: 00007f5650f37000 RBP: 000000000072c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5650f156d4 R13: 00000000004be7ed R14: 00000000004ced68 R15: 00000000ffffffff kobject: 'loop2' (00000000fe646049): kobject_uevent_env kobject: 'loop2' (00000000fe646049): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (000000007e27f12f): kobject_uevent_env kobject: 'loop3' (000000007e27f12f): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000201e517d): kobject_uevent_env kobject: 'loop5' (00000000201e517d): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (000000005886043a): kobject_uevent_env kobject: 'loop0' (000000005886043a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (0000000014c0c9c3): kobject_uevent_env kobject: 'loop4' (0000000014c0c9c3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (0000000051c2ac1a): kobject_uevent_env kobject: 'loop1' (0000000051c2ac1a): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (00000000fe646049): kobject_uevent_env kobject: 'loop2' (00000000fe646049): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (000000007e27f12f): kobject_uevent_env kobject: 'loop3' (000000007e27f12f): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (0000000051c2ac1a): kobject_uevent_env kobject: 'loop1' (0000000051c2ac1a): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000201e517d): kobject_uevent_env kobject: 'loop5' (00000000201e517d): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (000000005886043a): kobject_uevent_env kobject: 'loop0' (000000005886043a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (0000000014c0c9c3): kobject_uevent_env kobject: 'loop4' (0000000014c0c9c3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (00000000fe646049): kobject_uevent_env kobject: 'loop2' (00000000fe646049): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (000000007e27f12f): kobject_uevent_env kobject: 'loop3' (000000007e27f12f): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (0000000051c2ac1a): kobject_uevent_env kobject: 'loop1' (0000000051c2ac1a): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000201e517d): kobject_uevent_env kobject: 'loop5' (00000000201e517d): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (0000000014c0c9c3): kobject_uevent_env kobject: 'loop4' (0000000014c0c9c3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (000000005886043a): kobject_uevent_env kobject: 'loop0' (000000005886043a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (00000000fe646049): kobject_uevent_env kobject: 'loop2' (00000000fe646049): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (0000000051c2ac1a): kobject_uevent_env kobject: 'loop1' (0000000051c2ac1a): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (000000007e27f12f): kobject_uevent_env kobject: 'loop3' (000000007e27f12f): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000201e517d): kobject_uevent_env kobject: 'loop5' (00000000201e517d): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (000000005886043a): kobject_uevent_env kobject: 'loop0' (000000005886043a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (0000000014c0c9c3): kobject_uevent_env kobject: 'loop4' (0000000014c0c9c3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (00000000fe646049): kobject_uevent_env kobject: 'loop2' (00000000fe646049): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (000000007e27f12f): kobject_uevent_env kobject: 'loop3' (000000007e27f12f): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000201e517d): kobject_uevent_env kobject: 'loop5' (00000000201e517d): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (0000000051c2ac1a): kobject_uevent_env kobject: 'loop1' (0000000051c2ac1a): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (0000000014c0c9c3): kobject_uevent_env kobject: 'loop4' (0000000014c0c9c3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (000000005886043a): kobject_uevent_env kobject: 'loop0' (000000005886043a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (00000000fe646049): kobject_uevent_env kobject: 'loop2' (00000000fe646049): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (000000007e27f12f): kobject_uevent_env kobject: 'loop3' (000000007e27f12f): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000201e517d): kobject_uevent_env kobject: 'loop5' (00000000201e517d): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (0000000014c0c9c3): kobject_uevent_env kobject: 'loop4' (0000000014c0c9c3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (000000005886043a): kobject_uevent_env kobject: 'loop0' (000000005886043a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (0000000051c2ac1a): kobject_uevent_env kobject: 'loop1' (0000000051c2ac1a): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (00000000fe646049): kobject_uevent_env kobject: 'loop2' (00000000fe646049): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (000000007e27f12f): kobject_uevent_env kobject: 'loop3' (000000007e27f12f): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000201e517d): kobject_uevent_env kobject: 'loop5' (00000000201e517d): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (000000005886043a): kobject_uevent_env kobject: 'loop0' (000000005886043a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (0000000051c2ac1a): kobject_uevent_env kobject: 'loop1' (0000000051c2ac1a): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (0000000014c0c9c3): kobject_uevent_env kobject: 'loop4' (0000000014c0c9c3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (00000000fe646049): kobject_uevent_env kobject: 'loop2' (00000000fe646049): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (000000007e27f12f): kobject_uevent_env kobject: 'loop3' (000000007e27f12f): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (000000005886043a): kobject_uevent_env kobject: 'loop0' (000000005886043a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (00000000201e517d): kobject_uevent_env kobject: 'loop5' (00000000201e517d): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (0000000014c0c9c3): kobject_uevent_env kobject: 'loop4' (0000000014c0c9c3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (0000000051c2ac1a): kobject_uevent_env kobject: 'loop1' (0000000051c2ac1a): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (00000000fe646049): kobject_uevent_env kobject: 'loop2' (00000000fe646049): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (000000007e27f12f): kobject_uevent_env kobject: 'loop3' (000000007e27f12f): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (000000005886043a): kobject_uevent_env kobject: 'loop0' (000000005886043a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (00000000201e517d): kobject_uevent_env kobject: 'loop5' (00000000201e517d): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (0000000014c0c9c3): kobject_uevent_env kobject: 'loop4' (0000000014c0c9c3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (0000000051c2ac1a): kobject_uevent_env kobject: 'loop1' (0000000051c2ac1a): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (000000007e27f12f): kobject_uevent_env kobject: 'loop3' (000000007e27f12f): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (00000000fe646049): kobject_uevent_env kobject: 'loop2' (00000000fe646049): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (000000005886043a): kobject_uevent_env kobject: 'loop0' (000000005886043a): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (00000000201e517d): kobject_uevent_env kobject: 'loop5' (00000000201e517d): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (0000000014c0c9c3): kobject_uevent_env kobject: 'loop4' (0000000014c0c9c3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (0000000051c2ac1a): kobject_uevent_env kobject: 'loop1' (0000000051c2ac1a): fill_kobj_path: path = '/devices/virtual/block/loop1'