================================================================== BUG: KASAN: slab-use-after-free in cfusbl_device_notify+0x12c/0x580 net/caif/caif_usb.c:142 Read of size 8 at addr ffff0000c9b38c50 by task syz.2.29/6737 CPU: 0 U CPU: 0 UID: 0 PID: 6737 Comm: syz.2.29 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 print_address_description+0xa8/0x238 mm/kasan/report.c:378 print_report+0x68/0x84 mm/kasan/report.c:482 kasan_report+0xb0/0x110 mm/kasan/report.c:595 __asan_report_load8_noabort+0x20/0x2c mm/kasan/report_generic.c:381 cfusbl_device_notify+0x12c/0x580 net/caif/caif_usb.c:142 notifier_call_chain+0x1b8/0x4e4 kernel/notifier.c:85 raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453 call_netdevice_notifiers_info net/core/dev.c:2229 [inline] call_netdevice_notifiers_extack net/core/dev.c:2267 [inline] call_netdevice_notifiers+0x10c/0x18c net/core/dev.c:2281 register_netdevice+0xb14/0x1248 net/core/dev.c:11201 register_netdev+0x4c/0x68 net/core/dev.c:11322 bnep_add_connection+0x578/0x9dc net/bluetooth/bnep/core.c:624 do_bnep_sock_ioctl+0x3c8/0x624 net/bluetooth/bnep/sock.c:83 bnep_sock_ioctl+0x28/0x38 net/bluetooth/bnep/sock.c:139 sock_do_ioctl+0xf4/0x2b4 net/socket.c:1238 sock_ioctl+0x57c/0x84c net/socket.c:1359 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:598 [inline] __se_sys_ioctl fs/ioctl.c:584 [inline] __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:584 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Allocated by task 52: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:68 kasan_save_alloc_info+0x44/0x54 mm/kasan/generic.c:562 poison_kmalloc_redzone mm/kasan/common.c:388 [inline] __kasan_kmalloc+0x9c/0xb4 mm/kasan/common.c:405 kasan_kmalloc include/linux/kasan.h:260 [inline] __kmalloc_cache_noprof+0x2a4/0x3fc mm/slub.c:4396 kmalloc_noprof include/linux/slab.h:905 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] __hci_conn_add+0x27c/0x15a0 net/bluetooth/hci_conn.c:949 hci_conn_add_unset+0x78/0xf8 net/bluetooth/hci_conn.c:1061 hci_conn_request_evt+0x4a0/0x920 net/bluetooth/hci_event.c:3288 hci_event_func net/bluetooth/hci_event.c:7545 [inline] hci_event_packet+0x704/0xf04 net/bluetooth/hci_event.c:7599 hci_rx_work+0x320/0xb18 net/bluetooth/hci_core.c:4071 process_one_work+0x7e8/0x155c kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 Freed by task 6733: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:68 kasan_save_free_info+0x58/0x70 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:243 [inline] __kasan_slab_free+0x74/0x98 mm/kasan/common.c:275 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2417 [inline] slab_free mm/slub.c:4680 [inline] kfree+0x17c/0x474 mm/slub.c:4879 bt_link_release+0x20/0x30 net/bluetooth/hci_sysfs.c:16 device_release+0x8c/0x1ac drivers/base/core.c:-1 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x2b0/0x438 lib/kobject.c:737 put_device drivers/base/core.c:3797 [inline] device_unregister+0x3c/0xcc drivers/base/core.c:3920 hci_conn_del_sysfs+0xf0/0x170 net/bluetooth/hci_sysfs.c:79 hci_conn_cleanup net/bluetooth/hci_conn.c:173 [inline] hci_conn_del+0xa40/0xf3c net/bluetooth/hci_conn.c:1211 hci_conn_hash_flush+0x17c/0x218 net/bluetooth/hci_conn.c:2600 hci_dev_close_sync+0x89c/0x1154 net/bluetooth/hci_sync.c:5294 hci_dev_do_close net/bluetooth/hci_core.c:501 [inline] hci_unregister_dev+0x204/0x4c0 net/bluetooth/hci_core.c:2715 vhci_release+0x7c/0xd0 drivers/bluetooth/hci_vhci.c:665 __fput+0x340/0x75c fs/file_table.c:468 ____fput+0x20/0x58 fs/file_table.c:496 task_work_run+0x1dc/0x260 kernel/task_work.c:227 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x524/0x1a14 kernel/exit.c:961 do_group_exit+0x194/0x22c kernel/exit.c:1102 get_signal+0x11dc/0x12f8 kernel/signal.c:3034 do_signal+0x274/0x4434 arch/arm64/kernel/signal.c:1618 do_notify_resume+0xb0/0x1f4 arch/arm64/kernel/entry-common.c:152 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:173 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:182 [inline] el0_svc+0xb8/0x180 arch/arm64/kernel/entry-common.c:880 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Last potentially related work creation: kasan_save_stack+0x40/0x6c mm/kasan/common.c:47 kasan_record_aux_stack+0xb0/0xc8 mm/kasan/generic.c:548 insert_work+0x54/0x2cc kernel/workqueue.c:2184 __queue_work+0xdb0/0x1210 kernel/workqueue.c:2339 __queue_delayed_work+0xfc/0x2c8 kernel/workqueue.c:2507 queue_delayed_work_on+0xe4/0x194 kernel/workqueue.c:2559 queue_delayed_work include/linux/workqueue.h:684 [inline] hci_conn_drop+0x174/0x280 include/net/bluetooth/hci_core.h:1675 l2cap_chan_del+0x228/0x470 net/bluetooth/l2cap_core.c:671 l2cap_conn_del+0x2f8/0x5f0 net/bluetooth/l2cap_core.c:1787 l2cap_disconn_cfm+0x90/0xe0 net/bluetooth/l2cap_core.c:7325 hci_disconn_cfm include/net/bluetooth/hci_core.h:2097 [inline] hci_conn_hash_flush+0x108/0x218 net/bluetooth/hci_conn.c:2599 hci_dev_close_sync+0x89c/0x1154 net/bluetooth/hci_sync.c:5294 hci_dev_do_close net/bluetooth/hci_core.c:501 [inline] hci_unregister_dev+0x204/0x4c0 net/bluetooth/hci_core.c:2715 vhci_release+0x7c/0xd0 drivers/bluetooth/hci_vhci.c:665 __fput+0x340/0x75c fs/file_table.c:468 ____fput+0x20/0x58 fs/file_table.c:496 task_work_run+0x1dc/0x260 kernel/task_work.c:227 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x524/0x1a14 kernel/exit.c:961 do_group_exit+0x194/0x22c kernel/exit.c:1102 get_signal+0x11dc/0x12f8 kernel/signal.c:3034 do_signal+0x274/0x4434 arch/arm64/kernel/signal.c:1618 do_notify_resume+0xb0/0x1f4 arch/arm64/kernel/entry-common.c:152 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:173 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:182 [inline] el0_svc+0xb8/0x180 arch/arm64/kernel/entry-common.c:880 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 The buggy address belongs to the object at ffff0000c9b38000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 3152 bytes inside of freed 8192-byte region [ffff0000c9b38000, ffff0000c9b3a000) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109b38 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 05ffc00000000040 ffff0000c0002280 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000 head: 05ffc00000000040 ffff0000c0002280 dead000000000122 0000000000000000 head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000 head: 05ffc00000000003 fffffdffc326ce01 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000c9b38b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000c9b38b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0000c9b38c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000c9b38c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000c9b38d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ------------[ cut here ]------------ refcount_t: addition on 0; use-after-free. WARNING: CPU: 1 PID: 6737 at lib/refcount.c:25 refcount_warn_saturate+0x134/0x1f8 lib/refcount.c:25 Modules linked in: CPU: 1 UID: 0 PID: 6737 Comm: syz.2.29 Tainted: G B syzkaller #0 PREEMPT Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : refcount_warn_saturate+0x134/0x1f8 lib/refcount.c:25 lr : refcount_warn_saturate+0x134/0x1f8 lib/refcount.c:25 sp : ffff80009e8a76a0 x29: ffff80009e8a76a0 x28: 0000000000000000 x27: 1fffe000192e88d9 x26: 1fffe000192e88e2 x25: dfff800000000000 x24: 1fffe000192e88e3 x23: ffff0000dc99d400 x22: 0000000000000000 x21: 0000000000000000 x20: ffff0000c9b38c20 x19: ffff800092e12000 x18: 1fffe0003379be88 x17: ffff80008f7de000 x16: ffff80008b00ff28 x15: 0000000000000001 x14: 1ffff00013d14e08 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000080000 x10: 0000000000022fe0 x9 : 9370cb100890a100 x8 : 9370cb100890a100 x7 : 0000000000000001 x6 : ffff800080563d2c x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002 x2 : 0000000000000002 x1 : 0000000100000000 x0 : 0000000000000000 Call trace: refcount_warn_saturate+0x134/0x1f8 lib/refcount.c:25 (P) __refcount_add include/linux/refcount.h:-1 [inline] __refcount_inc include/linux/refcount.h:366 [inline] refcount_inc include/linux/refcount.h:383 [inline] kref_get include/linux/kref.h:45 [inline] kobject_get+0x10c/0x148 lib/kobject.c:643 get_device drivers/base/core.c:3785 [inline] device_add+0x1fc/0xa60 drivers/base/core.c:3612 netdev_register_kobject+0x15c/0x2e0 net/core/net-sysfs.c:2356 register_netdevice+0xb58/0x1248 net/core/dev.c:11206 register_netdev+0x4c/0x68 net/core/dev.c:11322 bnep_add_connection+0x578/0x9dc net/bluetooth/bnep/core.c:624 do_bnep_sock_ioctl+0x3c8/0x624 net/bluetooth/bnep/sock.c:83 bnep_sock_ioctl+0x28/0x38 net/bluetooth/bnep/sock.c:139 sock_do_ioctl+0xf4/0x2b4 net/socket.c:1238 sock_ioctl+0x57c/0x84c net/socket.c:1359 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:598 [inline] __se_sys_ioctl fs/ioctl.c:584 [inline] __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:584 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 irq event stamp: 947 hardirqs last enabled at (947): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1531 [inline] hardirqs last enabled at (947): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:5105 hardirqs last disabled at (946): [] __schedule+0x318/0x2864 kernel/sched/core.c:6845 softirqs last enabled at (724): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (722): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ refcount_t: saturated; leaking memory. WARNING: CPU: 1 PID: 6737 at lib/refcount.c:22 refcount_warn_saturate+0x1b4/0x1f8 lib/refcount.c:22 Modules linked in: CPU: 1 UID: 0 PID: 6737 Comm: syz.2.29 Tainted: G B W syzkaller #0 PREEMPT Tainted: [B]=BAD_PAGE, [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : refcount_warn_saturate+0x1b4/0x1f8 lib/refcount.c:22 lr : refcount_warn_saturate+0x1b4/0x1f8 lib/refcount.c:22 sp : ffff80009e8a74e0 x29: ffff80009e8a74e0 x28: 1fffe0001ec32e40 x27: dfff800000000000 x26: 1fffe000185a9f6b x25: 0000000000000001 x24: ffff0000f6197218 x23: 00000000c0000000 x22: ffff0000c9b38c20 x21: ffff0000c9b38be8 x20: ffff0000c9b38c20 x19: ffff800092e12000 x18: 1fffe0003379be88 x17: ffff80008f7de000 x16: ffff80008b00ff28 x15: 0000000000000001 x14: 1fffe00019243000 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000080000 x10: 0000000000000003 x9 : 9370cb100890a100 x8 : 9370cb100890a100 x7 : 0000000000000000 x6 : ffff800080491290 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800080483824 x2 : 0000000000000001 x1 : ffff80008b668300 x0 : 0000000000000001 Call trace: refcount_warn_saturate+0x1b4/0x1f8 lib/refcount.c:22 (P) __refcount_add include/linux/refcount.h:-1 [inline] __refcount_inc include/linux/refcount.h:366 [inline] refcount_inc include/linux/refcount.h:383 [inline] kref_get include/linux/kref.h:45 [inline] kobject_get lib/kobject.c:643 [inline] kobject_add_internal+0x884/0xb20 lib/kobject.c:225 kobject_add_varg lib/kobject.c:374 [inline] kobject_add+0x134/0x200 lib/kobject.c:426 class_dir_create_and_add drivers/base/core.c:3232 [inline] get_device_parent+0x2c8/0x350 drivers/base/core.c:3283 device_add+0x294/0xa60 drivers/base/core.c:3613 netdev_register_kobject+0x15c/0x2e0 net/core/net-sysfs.c:2356 register_netdevice+0xb58/0x1248 net/core/dev.c:11206 register_netdev+0x4c/0x68 net/core/dev.c:11322 bnep_add_connection+0x578/0x9dc net/bluetooth/bnep/core.c:624 do_bnep_sock_ioctl+0x3c8/0x624 net/bluetooth/bnep/sock.c:83 bnep_sock_ioctl+0x28/0x38 net/bluetooth/bnep/sock.c:139 sock_do_ioctl+0xf4/0x2b4 net/socket.c:1238 sock_ioctl+0x57c/0x84c net/socket.c:1359 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:598 [inline] __se_sys_ioctl fs/ioctl.c:584 [inline] __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:584 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 irq event stamp: 947 hardirqs last enabled at (947): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1531 [inline] hardirqs last enabled at (947): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:5105 hardirqs last disabled at (946): [] __schedule+0x318/0x2864 kernel/sched/core.c:6845 softirqs last enabled at (724): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (722): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ refcount_t: underflow; use-after-free. WARNING: CPU: 1 PID: 6737 at lib/refcount.c:28 refcount_warn_saturate+0x154/0x1f8 lib/refcount.c:28 Modules linked in: CPU: 1 UID: 0 PID: 6737 Comm: syz.2.29 Tainted: G B W syzkaller #0 PREEMPT Tainted: [B]=BAD_PAGE, [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : refcount_warn_saturate+0x154/0x1f8 lib/refcount.c:28 lr : refcount_warn_saturate+0x154/0x1f8 lib/refcount.c:28 sp : ffff80009e8a7470 x29: ffff80009e8a7470 x28: 1fffe0001ec32e40 x27: 1fffe0001936717d x26: 1fffe00019367184 x25: dfff800000000000 x24: ffff80008c5d4178 x23: 00000000fffffffe x22: ffff0000c9b38c24 x21: 00000000c0000000 x20: ffff0000c9b38c20 x19: ffff800092e12000 x18: 1fffe0003379be88 x17: ffff80008f7de000 x16: ffff80008b00ff28 x15: 0000000000000001 x14: 1ffff00013d14dfc x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000080000 x10: 00000000000712fe x9 : 9370cb100890a100 x8 : 9370cb100890a100 x7 : 0000000000000001 x6 : ffff800080563d2c x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000807de8f0 x2 : 0000000000000002 x1 : 0000000100000000 x0 : 0000000000000000 Call trace: refcount_warn_saturate+0x154/0x1f8 lib/refcount.c:28 (P) __refcount_sub_and_test include/linux/refcount.h:400 [inline] __refcount_dec_and_test include/linux/refcount.h:432 [inline] refcount_dec_and_test include/linux/refcount.h:450 [inline] kref_put include/linux/kref.h:64 [inline] kobject_put+0x194/0x438 lib/kobject.c:737 kobject_add_internal+0x7ac/0xb20 lib/kobject.c:243 kobject_add_varg lib/kobject.c:374 [inline] kobject_add+0x134/0x200 lib/kobject.c:426 class_dir_create_and_add drivers/base/core.c:3232 [inline] get_device_parent+0x2c8/0x350 drivers/base/core.c:3283 device_add+0x294/0xa60 drivers/base/core.c:3613 netdev_register_kobject+0x15c/0x2e0 net/core/net-sysfs.c:2356 register_netdevice+0xb58/0x1248 net/core/dev.c:11206 register_netdev+0x4c/0x68 net/core/dev.c:11322 bnep_add_connection+0x578/0x9dc net/bluetooth/bnep/core.c:624 do_bnep_sock_ioctl+0x3c8/0x624 net/bluetooth/bnep/sock.c:83 bnep_sock_ioctl+0x28/0x38 net/bluetooth/bnep/sock.c:139 sock_do_ioctl+0xf4/0x2b4 net/socket.c:1238 sock_ioctl+0x57c/0x84c net/socket.c:1359 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:598 [inline] __se_sys_ioctl fs/ioctl.c:584 [inline] __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:584 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 irq event stamp: 947 hardirqs last enabled at (947): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1531 [inline] hardirqs last enabled at (947): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:5105 hardirqs last disabled at (946): [] __schedule+0x318/0x2864 kernel/sched/core.c:6845 softirqs last enabled at (724): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (722): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- kobject: kobject_add_internal failed for net (error: -2 parent: )