===================================================== kobject: 'loop0' (00000000565b82bc): kobject_uevent_env WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected 5.0.0-rc4+ #51 Not tainted ----------------------------------------------------- syz-executor1/10872 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: 0000000059ab487e (&ctx->fault_pending_wqh){+.+.}, at: spin_lock include/linux/spinlock.h:329 [inline] 0000000059ab487e (&ctx->fault_pending_wqh){+.+.}, at: userfaultfd_ctx_read+0x690/0x2060 fs/userfaultfd.c:1040 and this task is already holding: 0000000089f197fb (&ctx->fd_wqh){....}, at: spin_lock_irq include/linux/spinlock.h:354 [inline] 0000000089f197fb (&ctx->fd_wqh){....}, at: userfaultfd_ctx_read+0x25e/0x2060 fs/userfaultfd.c:1036 kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' which would create a new lock dependency: (&ctx->fd_wqh){....} -> (&ctx->fault_pending_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 kobject: 'loop0' (00000000565b82bc): kobject_uevent_env 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 kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 arch_local_irq_restore arch/x86/include/asm/paravirt.h:766 [inline] lock_acquire+0x259/0x570 kernel/locking/lockdep.c:3844 __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] __kernfs_new_node+0x125/0x8a0 fs/kernfs/dir.c:639 kernfs_new_node+0x99/0x130 fs/kernfs/dir.c:695 __kernfs_create_file+0x51/0x340 fs/kernfs/file.c:991 sysfs_add_file_mode_ns+0x222/0x560 fs/sysfs/file.c:306 kobject: 'loop0' (00000000565b82bc): kobject_uevent_env create_files fs/sysfs/group.c:63 [inline] internal_create_group+0x3d2/0xd80 fs/sysfs/group.c:148 sysfs_create_group fs/sysfs/group.c:174 [inline] sysfs_create_groups fs/sysfs/group.c:201 [inline] sysfs_create_groups+0x9b/0x141 fs/sysfs/group.c:191 kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' device_add_groups drivers/base/core.c:1143 [inline] device_add_attrs drivers/base/core.c:1291 [inline] device_add+0x83e/0x1800 drivers/base/core.c:1930 netdev_register_kobject+0x18c/0x390 net/core/net-sysfs.c:1751 register_netdevice+0x8e1/0x10b0 net/core/dev.c:8629 veth_newlink+0x47b/0xa60 drivers/net/veth.c:1271 __rtnl_newlink+0x1281/0x1a70 net/core/rtnetlink.c:3182 rtnl_newlink+0x69/0xa0 net/core/rtnetlink.c:3240 rtnetlink_rcv_msg+0x481/0xc30 net/core/rtnetlink.c:5130 netlink_rcv_skb+0x17d/0x410 net/netlink/af_netlink.c:2477 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5148 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0x574/0x770 net/netlink/af_netlink.c:1336 netlink_sendmsg+0xa05/0xf90 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xdd/0x130 net/socket.c:631 __sys_sendto+0x387/0x5f0 net/socket.c:1788 __do_sys_sendto net/socket.c:1800 [inline] __se_sys_sendto net/socket.c:1796 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1796 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe 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 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x32a/0x3b0 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+0x696/0x800 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-executor1/10872: #0: 0000000089f197fb (&ctx->fd_wqh){....}, at: spin_lock_irq include/linux/spinlock.h:354 [inline] #0: 0000000089f197fb (&ctx->fd_wqh){....}, at: userfaultfd_ctx_read+0x25e/0x2060 fs/userfaultfd.c:1036 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] lock_acquire+0x259/0x570 kernel/locking/lockdep.c:3844 __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] __kernfs_new_node+0x125/0x8a0 fs/kernfs/dir.c:639 kernfs_new_node+0x99/0x130 fs/kernfs/dir.c:695 __kernfs_create_file+0x51/0x340 fs/kernfs/file.c:991 sysfs_add_file_mode_ns+0x222/0x560 fs/sysfs/file.c:306 create_files fs/sysfs/group.c:63 [inline] internal_create_group+0x3d2/0xd80 fs/sysfs/group.c:148 sysfs_create_group fs/sysfs/group.c:174 [inline] sysfs_create_groups fs/sysfs/group.c:201 [inline] sysfs_create_groups+0x9b/0x141 fs/sysfs/group.c:191 device_add_groups drivers/base/core.c:1143 [inline] device_add_attrs drivers/base/core.c:1291 [inline] device_add+0x83e/0x1800 drivers/base/core.c:1930 netdev_register_kobject+0x18c/0x390 net/core/net-sysfs.c:1751 register_netdevice+0x8e1/0x10b0 net/core/dev.c:8629 veth_newlink+0x47b/0xa60 drivers/net/veth.c:1271 __rtnl_newlink+0x1281/0x1a70 net/core/rtnetlink.c:3182 rtnl_newlink+0x69/0xa0 net/core/rtnetlink.c:3240 rtnetlink_rcv_msg+0x481/0xc30 net/core/rtnetlink.c:5130 netlink_rcv_skb+0x17d/0x410 net/netlink/af_netlink.c:2477 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5148 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0x574/0x770 net/netlink/af_netlink.c:1336 netlink_sendmsg+0xa05/0xf90 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xdd/0x130 net/socket.c:631 __sys_sendto+0x387/0x5f0 net/socket.c:1788 __do_sys_sendto net/socket.c:1800 [inline] __se_sys_sendto net/socket.c:1796 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1796 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe 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 kobject: 'loop4' (000000006c034f85): kobject_uevent_env apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 arch_local_irq_restore arch/x86/include/asm/paravirt.h:766 [inline] lock_acquire+0x259/0x570 kernel/locking/lockdep.c:3844 __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] __kernfs_new_node+0x125/0x8a0 fs/kernfs/dir.c:639 kernfs_new_node+0x99/0x130 fs/kernfs/dir.c:695 kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' __kernfs_create_file+0x51/0x340 fs/kernfs/file.c:991 sysfs_add_file_mode_ns+0x222/0x560 fs/sysfs/file.c:306 create_files fs/sysfs/group.c:63 [inline] internal_create_group+0x3d2/0xd80 fs/sysfs/group.c:148 sysfs_create_group fs/sysfs/group.c:174 [inline] sysfs_create_groups fs/sysfs/group.c:201 [inline] sysfs_create_groups+0x9b/0x141 fs/sysfs/group.c:191 device_add_groups drivers/base/core.c:1143 [inline] device_add_attrs drivers/base/core.c:1291 [inline] device_add+0x83e/0x1800 drivers/base/core.c:1930 netdev_register_kobject+0x18c/0x390 net/core/net-sysfs.c:1751 kobject: 'loop4' (000000006c034f85): kobject_uevent_env register_netdevice+0x8e1/0x10b0 net/core/dev.c:8629 veth_newlink+0x47b/0xa60 drivers/net/veth.c:1271 __rtnl_newlink+0x1281/0x1a70 net/core/rtnetlink.c:3182 kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' rtnl_newlink+0x69/0xa0 net/core/rtnetlink.c:3240 rtnetlink_rcv_msg+0x481/0xc30 net/core/rtnetlink.c:5130 netlink_rcv_skb+0x17d/0x410 net/netlink/af_netlink.c:2477 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5148 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0x574/0x770 net/netlink/af_netlink.c:1336 netlink_sendmsg+0xa05/0xf90 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xdd/0x130 net/socket.c:631 __sys_sendto+0x387/0x5f0 net/socket.c:1788 __do_sys_sendto net/socket.c:1800 [inline] __se_sys_sendto net/socket.c:1796 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1796 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 kobject: 'loop4' (000000006c034f85): kobject_uevent_env entry_SYSCALL_64_after_hwframe+0x49/0xbe } ... key at: [] __key.51971+0x0/0x40 ... acquired at: kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' __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_sys_io_submit fs/aio.c:1953 [inline] __se_sys_io_submit fs/aio.c:1923 [inline] __x64_sys_io_submit+0x1c4/0x5d0 fs/aio.c:1923 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> (&ctx->fd_wqh){....} { INITIAL USE at: lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3841 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:152 __wake_up_common_lock+0x19b/0x390 kernel/sched/wait.c:120 __wake_up+0xe/0x10 kernel/sched/wait.c:145 userfaultfd_release+0x667/0x8c0 fs/userfaultfd.c:924 __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 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x32a/0x3b0 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+0x696/0x800 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe } ... key at: [] __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] 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] __x64_sys_read+0x73/0xb0 fs/read_write.c:586 do_syscall_64+0x1a3/0x800 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+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 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x32a/0x3b0 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+0x696/0x800 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe 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 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x32a/0x3b0 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+0x696/0x800 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe 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_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 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x32a/0x3b0 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+0x696/0x800 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe } ... key at: [] __key.44850+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] 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] __x64_sys_read+0x73/0xb0 fs/read_write.c:586 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe stack backtrace: CPU: 0 PID: 10872 Comm: syz-executor1 Not tainted 5.0.0-rc4+ #51 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] 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] __x64_sys_read+0x73/0xb0 fs/read_write.c:586 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458089 Code: 6d b7 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f35c8e70c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458089 RDX: 0000000000000064 RSI: 0000000020000140 RDI: 0000000000000003 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f35c8e716d4 R13: 00000000004c3b77 R14: 00000000004d8500 R15: 00000000ffffffff kobject: 'loop3' (0000000014b4b5b3): kobject_uevent_env kobject: 'loop3' (0000000014b4b5b3): fill_kobj_path: path = '/devices/virtual/block/loop3' protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 kobject: 'loop1' (00000000e4826af9): kobject_uevent_env kobject: 'loop1' (00000000e4826af9): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000eda7c776): kobject_uevent_env kobject: 'loop5' (00000000eda7c776): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop5' (00000000eda7c776): kobject_uevent_env kobject: 'loop5' (00000000eda7c776): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (000000002a77ac50): kobject_uevent_env kobject: 'loop2' (000000002a77ac50): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (0000000014b4b5b3): kobject_uevent_env kobject: 'loop3' (0000000014b4b5b3): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (000000002a77ac50): kobject_uevent_env kobject: 'loop2' (000000002a77ac50): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000e4826af9): kobject_uevent_env kobject: 'loop1' (00000000e4826af9): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (0000000014b4b5b3): kobject_uevent_env kobject: 'loop3' (0000000014b4b5b3): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop3' (0000000014b4b5b3): kobject_uevent_env kobject: 'loop3' (0000000014b4b5b3): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (000000002a77ac50): kobject_uevent_env kobject: 'loop2' (000000002a77ac50): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (00000000e4826af9): kobject_uevent_env kobject: 'loop1' (00000000e4826af9): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000eda7c776): kobject_uevent_env kobject: 'loop5' (00000000eda7c776): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (0000000014b4b5b3): kobject_uevent_env kobject: 'loop3' (0000000014b4b5b3): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (0000000014b4b5b3): kobject_uevent_env kobject: 'loop3' (0000000014b4b5b3): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (000000002a77ac50): kobject_uevent_env kobject: 'loop2' (000000002a77ac50): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (0000000014b4b5b3): kobject_uevent_env kobject: 'loop3' (0000000014b4b5b3): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000eda7c776): kobject_uevent_env kobject: 'loop5' (00000000eda7c776): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (0000000014b4b5b3): kobject_uevent_env kobject: 'loop3' (0000000014b4b5b3): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (000000002a77ac50): kobject_uevent_env kobject: 'loop2' (000000002a77ac50): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000e4826af9): kobject_uevent_env kobject: 'loop1' (00000000e4826af9): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (000000002a77ac50): kobject_uevent_env kobject: 'loop2' (000000002a77ac50): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000eda7c776): kobject_uevent_env kobject: 'loop5' (00000000eda7c776): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (000000002a77ac50): kobject_uevent_env kobject: 'loop2' (000000002a77ac50): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (0000000014b4b5b3): kobject_uevent_env kobject: 'loop3' (0000000014b4b5b3): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (00000000e4826af9): kobject_uevent_env kobject: 'loop1' (00000000e4826af9): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (000000002a77ac50): kobject_uevent_env kobject: 'loop2' (000000002a77ac50): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000eda7c776): kobject_uevent_env kobject: 'loop5' (00000000eda7c776): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (000000002a77ac50): kobject_uevent_env kobject: 'loop2' (000000002a77ac50): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (0000000014b4b5b3): kobject_uevent_env kobject: 'loop3' (0000000014b4b5b3): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (000000002a77ac50): kobject_uevent_env kobject: 'loop2' (000000002a77ac50): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000eda7c776): kobject_uevent_env kobject: 'loop5' (00000000eda7c776): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (00000000e4826af9): kobject_uevent_env kobject: 'loop1' (00000000e4826af9): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000e4826af9): kobject_uevent_env kobject: 'loop1' (00000000e4826af9): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (0000000014b4b5b3): kobject_uevent_env kobject: 'loop3' (0000000014b4b5b3): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000e4826af9): kobject_uevent_env kobject: 'loop1' (00000000e4826af9): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (000000002a77ac50): kobject_uevent_env kobject: 'loop2' (000000002a77ac50): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000e4826af9): kobject_uevent_env kobject: 'loop1' (00000000e4826af9): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000eda7c776): kobject_uevent_env kobject: 'loop5' (00000000eda7c776): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (000000002a77ac50): kobject_uevent_env kobject: 'loop2' (000000002a77ac50): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (0000000014b4b5b3): kobject_uevent_env kobject: 'loop3' (0000000014b4b5b3): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000e4826af9): kobject_uevent_env kobject: 'loop1' (00000000e4826af9): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (0000000014b4b5b3): kobject_uevent_env kobject: 'loop3' (0000000014b4b5b3): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (000000002a77ac50): kobject_uevent_env kobject: 'loop2' (000000002a77ac50): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (00000000e4826af9): kobject_uevent_env kobject: 'loop1' (00000000e4826af9): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000eda7c776): kobject_uevent_env kobject: 'loop5' (00000000eda7c776): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (00000000e4826af9): kobject_uevent_env kobject: 'loop1' (00000000e4826af9): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (0000000014b4b5b3): kobject_uevent_env kobject: 'loop3' (0000000014b4b5b3): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (00000000e4826af9): kobject_uevent_env kobject: 'loop1' (00000000e4826af9): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000eda7c776): kobject_uevent_env kobject: 'loop5' (00000000eda7c776): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (0000000014b4b5b3): kobject_uevent_env kobject: 'loop3' (0000000014b4b5b3): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000e4826af9): kobject_uevent_env kobject: 'loop1' (00000000e4826af9): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000e4826af9): kobject_uevent_env kobject: 'loop1' (00000000e4826af9): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (00000000eda7c776): kobject_uevent_env kobject: 'loop5' (00000000eda7c776): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (0000000014b4b5b3): kobject_uevent_env kobject: 'loop3' (0000000014b4b5b3): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (00000000e4826af9): kobject_uevent_env kobject: 'loop1' (00000000e4826af9): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (000000002a77ac50): kobject_uevent_env kobject: 'loop2' (000000002a77ac50): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000e4826af9): kobject_uevent_env kobject: 'loop1' (00000000e4826af9): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (0000000014b4b5b3): kobject_uevent_env kobject: 'loop3' (0000000014b4b5b3): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (0000000014b4b5b3): kobject_uevent_env kobject: 'loop3' (0000000014b4b5b3): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000eda7c776): kobject_uevent_env kobject: 'loop5' (00000000eda7c776): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (00000000e4826af9): kobject_uevent_env kobject: 'loop1' (00000000e4826af9): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (00000000eda7c776): kobject_uevent_env kobject: 'loop5' (00000000eda7c776): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (000000002a77ac50): kobject_uevent_env kobject: 'loop2' (000000002a77ac50): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (0000000014b4b5b3): kobject_uevent_env kobject: 'loop3' (0000000014b4b5b3): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000e4826af9): kobject_uevent_env kobject: 'loop1' (00000000e4826af9): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000e4826af9): kobject_uevent_env kobject: 'loop1' (00000000e4826af9): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (0000000014b4b5b3): kobject_uevent_env kobject: 'loop3' (0000000014b4b5b3): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000eda7c776): kobject_uevent_env kobject: 'loop5' (00000000eda7c776): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (000000002a77ac50): kobject_uevent_env kobject: 'loop2' (000000002a77ac50): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000e4826af9): kobject_uevent_env kobject: 'loop1' (00000000e4826af9): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (000000002a77ac50): kobject_uevent_env kobject: 'loop2' (000000002a77ac50): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000e4826af9): kobject_uevent_env kobject: 'loop1' (00000000e4826af9): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (00000000e4826af9): kobject_uevent_env kobject: 'loop1' (00000000e4826af9): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (000000002a77ac50): kobject_uevent_env kobject: 'loop2' (000000002a77ac50): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000e4826af9): kobject_uevent_env kobject: 'loop1' (00000000e4826af9): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (0000000014b4b5b3): kobject_uevent_env kobject: 'loop3' (0000000014b4b5b3): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000eda7c776): kobject_uevent_env kobject: 'loop5' (00000000eda7c776): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000e4826af9): kobject_uevent_env kobject: 'loop1' (00000000e4826af9): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000e4826af9): kobject_uevent_env kobject: 'loop1' (00000000e4826af9): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (0000000014b4b5b3): kobject_uevent_env kobject: 'loop3' (0000000014b4b5b3): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (000000006c034f85): kobject_uevent_env kobject: 'loop4' (000000006c034f85): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000565b82bc): kobject_uevent_env kobject: 'loop0' (00000000565b82bc): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (00000000eda7c776): kobject_uevent_env kobject: 'loop5' (00000000eda7c776): fill_kobj_path: path = '/devices/virtual/block/loop5'