================================================================== BUG: KASAN: slab-use-after-free in cfusbl_device_notify+0x12c/0x580 net/caif/caif_usb.c:142 Read of size 8 at addr ffff0000db318c50 by task syz.5.184/7587 CPU: 1 UID: 0 PID: 7587 Comm: syz.5.184 Not tainted 6.16.0-rc4-syzkaller-g25b50375179c #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:501 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 print_address_description+0xa8/0x254 mm/kasan/report.c:408 print_report+0x68/0x84 mm/kasan/report.c:521 kasan_report+0xb0/0x110 mm/kasan/report.c:634 __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:2230 [inline] call_netdevice_notifiers_extack net/core/dev.c:2268 [inline] call_netdevice_notifiers+0x10c/0x18c net/core/dev.c:2282 register_netdevice+0xb14/0x1248 net/core/dev.c:11100 register_netdev+0x4c/0x68 net/core/dev.c:11221 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:1190 sock_ioctl+0x57c/0x84c net/socket.c:1311 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:893 __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:600 Allocated by task 6516: 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:377 [inline] __kasan_kmalloc+0x9c/0xb4 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __kmalloc_cache_noprof+0x2a4/0x3fc mm/slub.c:4359 kmalloc_noprof include/linux/slab.h:905 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] __hci_conn_add+0x264/0x14c4 net/bluetooth/hci_conn.c:939 hci_conn_add_unset+0x78/0xf8 net/bluetooth/hci_conn.c:1051 hci_conn_request_evt+0x490/0x910 net/bluetooth/hci_event.c:3316 hci_event_func net/bluetooth/hci_event.c:7511 [inline] hci_event_packet+0x650/0xe9c net/bluetooth/hci_event.c:7565 hci_rx_work+0x320/0xb18 net/bluetooth/hci_core.c:4070 process_one_work+0x7e8/0x155c kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3321 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3402 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:847 Freed by task 7591: 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:247 [inline] __kasan_slab_free+0x68/0x88 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2381 [inline] slab_free mm/slub.c:4643 [inline] kfree+0x17c/0x474 mm/slub.c:4842 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:3800 [inline] device_unregister+0x3c/0xcc drivers/base/core.c:3923 hci_conn_del_sysfs+0xf0/0x170 net/bluetooth/hci_sysfs.c:79 hci_conn_cleanup net/bluetooth/hci_conn.c:175 [inline] hci_conn_del+0x784/0xaf0 net/bluetooth/hci_conn.c:1173 hci_conn_hash_flush+0x178/0x214 net/bluetooth/hci_conn.c:2561 hci_dev_do_reset net/bluetooth/hci_core.c:566 [inline] hci_dev_reset+0x320/0x578 net/bluetooth/hci_core.c:610 hci_sock_ioctl+0x59c/0x86c net/bluetooth/hci_sock.c:1140 sock_do_ioctl+0xf4/0x2b4 net/socket.c:1190 sock_ioctl+0x57c/0x84c net/socket.c:1311 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:893 __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:600 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:2183 __queue_work+0xdd8/0x1230 kernel/workqueue.c:2341 __queue_delayed_work+0xfc/0x2c8 kernel/workqueue.c:2509 queue_delayed_work_on+0xe4/0x194 kernel/workqueue.c:2561 queue_delayed_work include/linux/workqueue.h:677 [inline] hci_conn_drop+0x174/0x280 include/net/bluetooth/hci_core.h:1662 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:7309 hci_disconn_cfm include/net/bluetooth/hci_core.h:2071 [inline] hci_conn_hash_flush+0x104/0x214 net/bluetooth/hci_conn.c:2560 hci_dev_do_reset net/bluetooth/hci_core.c:566 [inline] hci_dev_reset+0x320/0x578 net/bluetooth/hci_core.c:610 hci_sock_ioctl+0x59c/0x86c net/bluetooth/hci_sock.c:1140 sock_do_ioctl+0xf4/0x2b4 net/socket.c:1190 sock_ioctl+0x57c/0x84c net/socket.c:1311 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:893 __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:600 The buggy address belongs to the object at ffff0000db318000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 3152 bytes inside of freed 8192-byte region [ffff0000db318000, ffff0000db31a000) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11b318 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 05ffc00000000040 ffff0000c0002280 0000000000000000 0000000000000001 raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000 head: 05ffc00000000040 ffff0000c0002280 0000000000000000 0000000000000001 head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000 head: 05ffc00000000003 fffffdffc36cc601 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000db318b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000db318b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0000db318c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000db318c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000db318d00: 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: 0 PID: 7587 at lib/refcount.c:25 refcount_warn_saturate+0x134/0x1f8 lib/refcount.c:25 Modules linked in: CPU: 0 UID: 0 PID: 7587 Comm: syz.5.184 Tainted: G B 6.16.0-rc4-syzkaller-g25b50375179c #0 PREEMPT Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 pstate: 60400005 (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 : ffff8000a28e76a0 x29: ffff8000a28e76a0 x28: 0000000000000000 x27: 1fffe0001e4ca4dc x26: 1fffe0001e4ca4e5 x25: dfff800000000000 x24: 1fffe0001e4ca4e6 x23: ffff0000f29a2000 x22: 0000000000000000 x21: 0000000000000000 x20: ffff0000db318c20 x19: ffff800092c30000 x18: 1fffe000337d8876 x17: 0000000000000000 x16: ffff80008ae45088 x15: ffff700011eda14c x14: 1ffff00011eda14c x13: 0000000000000004 x12: ffffffffffffffff x11: 0000000000080000 x10: 000000000002c5e6 x9 : 8c350957dc5f7400 x8 : 8c350957dc5f7400 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff8000a28e6ff8 x4 : ffff80008f746c20 x3 : ffff80008054bb60 x2 : 0000000000000000 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:3788 [inline] device_add+0x1fc/0xa60 drivers/base/core.c:3615 netdev_register_kobject+0x138/0x2bc net/core/net-sysfs.c:2336 register_netdevice+0xb58/0x1248 net/core/dev.c:11105 register_netdev+0x4c/0x68 net/core/dev.c:11221 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:1190 sock_ioctl+0x57c/0x84c net/socket.c:1311 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:893 __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:600 irq event stamp: 1071 hardirqs last enabled at (1071): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1544 [inline] hardirqs last enabled at (1071): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:5144 hardirqs last disabled at (1070): [] __schedule+0x320/0x2a28 kernel/sched/core.c:6689 softirqs last enabled at (1062): [] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (1062): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607 softirqs last disabled at (1035): [] __do_softirq+0x14/0x20 kernel/softirq.c:613 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ refcount_t: saturated; leaking memory. WARNING: CPU: 1 PID: 7587 at lib/refcount.c:22 refcount_warn_saturate+0x1b4/0x1f8 lib/refcount.c:22 Modules linked in: CPU: 1 UID: 0 PID: 7587 Comm: syz.5.184 Tainted: G B W 6.16.0-rc4-syzkaller-g25b50375179c #0 PREEMPT Tainted: [B]=BAD_PAGE, [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 pstate: 60400005 (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 : ffff8000a28e74e0 x29: ffff8000a28e74e0 x28: 1fffe0001be18dc0 x27: dfff800000000000 x26: 1fffe000185ae76b x25: 0000000000000001 x24: ffff0000df0c6e18 x23: 00000000c0000000 x22: ffff0000db318c20 x21: ffff0000db318be8 x20: ffff0000db318c20 x19: ffff800092c30000 x18: 1fffe000337d8876 x17: 0000000000000000 x16: ffff80008aedd7c0 x15: 0000000000000001 x14: 1fffe000337dfaf0 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000080000 x10: 0000000000000003 x9 : 8c350957dc5f7400 x8 : 8c350957dc5f7400 x7 : 0000000000000000 x6 : ffff80008aee9048 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000010 x2 : ffff8000a28e7150 x1 : ffff80008b5187a0 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:3235 [inline] get_device_parent+0x2c8/0x350 drivers/base/core.c:3286 device_add+0x294/0xa60 drivers/base/core.c:3616 netdev_register_kobject+0x138/0x2bc net/core/net-sysfs.c:2336 register_netdevice+0xb58/0x1248 net/core/dev.c:11105 register_netdev+0x4c/0x68 net/core/dev.c:11221 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:1190 sock_ioctl+0x57c/0x84c net/socket.c:1311 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:893 __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:600 irq event stamp: 1071 hardirqs last enabled at (1071): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1544 [inline] hardirqs last enabled at (1071): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:5144 hardirqs last disabled at (1070): [] __schedule+0x320/0x2a28 kernel/sched/core.c:6689 softirqs last enabled at (1062): [] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (1062): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607 softirqs last disabled at (1035): [] __do_softirq+0x14/0x20 kernel/softirq.c:613 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ refcount_t: underflow; use-after-free. WARNING: CPU: 1 PID: 7587 at lib/refcount.c:28 refcount_warn_saturate+0x154/0x1f8 lib/refcount.c:28 Modules linked in: CPU: 1 UID: 0 PID: 7587 Comm: syz.5.184 Tainted: G B W 6.16.0-rc4-syzkaller-g25b50375179c #0 PREEMPT Tainted: [B]=BAD_PAGE, [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 pstate: 60400005 (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 : ffff8000a28e7470 x29: ffff8000a28e7470 x28: 1fffe0001be18dc0 x27: 1fffe0001b66317d x26: 1fffe0001b663184 x25: dfff800000000000 x24: ffff80008c450318 x23: 00000000fffffffe x22: ffff0000db318c24 x21: 00000000c0000000 x20: ffff0000db318c20 x19: ffff800092c30000 x18: 1fffe000337dd076 x17: ffff80008f64e000 x16: ffff80008aedd7c0 x15: 0000000000000001 x14: 1fffe000337dfaf0 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000080000 x10: 0000000000000003 x9 : 8c350957dc5f7400 x8 : 8c350957dc5f7400 x7 : 0000000000000004 x6 : ffff8000804872ac x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000010 x2 : ffff8000a28e7020 x1 : ffff80008b5187a0 x0 : 0000000000000001 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:3235 [inline] get_device_parent+0x2c8/0x350 drivers/base/core.c:3286 device_add+0x294/0xa60 drivers/base/core.c:3616 netdev_register_kobject+0x138/0x2bc net/core/net-sysfs.c:2336 register_netdevice+0xb58/0x1248 net/core/dev.c:11105 register_netdev+0x4c/0x68 net/core/dev.c:11221 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:1190 sock_ioctl+0x57c/0x84c net/socket.c:1311 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:893 __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:600 irq event stamp: 1071 hardirqs last enabled at (1071): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1544 [inline] hardirqs last enabled at (1071): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:5144 hardirqs last disabled at (1070): [] __schedule+0x320/0x2a28 kernel/sched/core.c:6689 softirqs last enabled at (1062): [] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (1062): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607 softirqs last disabled at (1035): [] __do_softirq+0x14/0x20 kernel/softirq.c:613 ---[ end trace 0000000000000000 ]--- kobject: kobject_add_internal failed for net (error: -2 parent: )