kobject: kobject_add_internal failed for tx-0 (error: -2 parent: queues) ================================================================== BUG: KASAN: slab-use-after-free in cfusbl_device_notify+0x883/0x900 net/caif/caif_usb.c:142 Read of size 8 at addr ffff88804f3e0c50 by task syz.4.602/8115 CPU: 2 UID: 0 PID: 8115 Comm: syz.4.602 Not tainted 6.15.0-rc2-syzkaller-00042-g1a1d569a75f3 #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0xc3/0x670 mm/kasan/report.c:521 kasan_report+0xe0/0x110 mm/kasan/report.c:634 cfusbl_device_notify+0x883/0x900 net/caif/caif_usb.c:142 notifier_call_chain+0xb9/0x410 kernel/notifier.c:85 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2174 call_netdevice_notifiers_extack net/core/dev.c:2212 [inline] call_netdevice_notifiers net/core/dev.c:2226 [inline] register_netdevice+0x145f/0x2270 net/core/dev.c:11066 register_netdev+0x34/0x50 net/core/dev.c:11124 bnep_add_connection+0x71c/0xd20 net/bluetooth/bnep/core.c:624 do_bnep_sock_ioctl.constprop.0+0x496/0x590 net/bluetooth/bnep/sock.c:83 sock_do_ioctl+0x115/0x280 net/socket.c:1190 sock_ioctl+0x227/0x6b0 net/socket.c:1311 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl fs/ioctl.c:892 [inline] __x64_sys_ioctl+0x190/0x200 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb19c78e169 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb19d51e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fb19c9b5fa0 RCX: 00007fb19c78e169 RDX: 0000200000000180 RSI: 00000000400442c8 RDI: 0000000000000010 RBP: 00007fb19c810a68 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fb19c9b5fa0 R15: 00007ffecdc1c508 Allocated by task 5304: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394 kmalloc_noprof include/linux/slab.h:905 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] __hci_conn_add+0x130/0x1b70 net/bluetooth/hci_conn.c:936 hci_conn_add_unset+0x6d/0x100 net/bluetooth/hci_conn.c:1047 hci_conn_request_evt+0x888/0xae0 net/bluetooth/hci_event.c:3289 hci_event_func net/bluetooth/hci_event.c:7492 [inline] hci_event_packet+0x9ee/0x1190 net/bluetooth/hci_event.c:7544 hci_rx_work+0x2c5/0x16b0 net/bluetooth/hci_core.c:4020 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400 kthread+0x3c2/0x780 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Freed by task 8115: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2389 [inline] slab_free mm/slub.c:4646 [inline] kfree+0x2b6/0x4d0 mm/slub.c:4845 device_release+0xa1/0x240 drivers/base/core.c:2568 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1e4/0x5a0 lib/kobject.c:737 put_device drivers/base/core.c:3774 [inline] device_del+0x6b1/0x9f0 drivers/base/core.c:3878 netdev_register_kobject+0x308/0x3a0 net/core/net-sysfs.c:2342 register_netdevice+0x13dc/0x2270 net/core/dev.c:11007 register_netdev+0x34/0x50 net/core/dev.c:11124 bnep_add_connection+0x71c/0xd20 net/bluetooth/bnep/core.c:624 do_bnep_sock_ioctl.constprop.0+0x496/0x590 net/bluetooth/bnep/sock.c:83 sock_do_ioctl+0x115/0x280 net/socket.c:1190 sock_ioctl+0x227/0x6b0 net/socket.c:1311 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl fs/ioctl.c:892 [inline] __x64_sys_ioctl+0x190/0x200 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Last potentially related work creation: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_record_aux_stack+0xb8/0xd0 mm/kasan/generic.c:548 insert_work+0x36/0x230 kernel/workqueue.c:2183 __queue_work+0x97e/0x10f0 kernel/workqueue.c:2341 __queue_delayed_work+0x35b/0x460 kernel/workqueue.c:2509 queue_delayed_work_on+0x1b5/0x200 kernel/workqueue.c:2561 queue_delayed_work include/linux/workqueue.h:677 [inline] hci_conn_drop include/net/bluetooth/hci_core.h:1663 [inline] hci_conn_drop include/net/bluetooth/hci_core.h:1637 [inline] l2cap_chan_del+0x5a0/0x8f0 net/bluetooth/l2cap_core.c:671 l2cap_conn_del+0x37a/0x730 net/bluetooth/l2cap_core.c:1786 l2cap_disconn_cfm net/bluetooth/l2cap_core.c:7299 [inline] l2cap_disconn_cfm+0x96/0xd0 net/bluetooth/l2cap_core.c:7292 hci_disconn_cfm include/net/bluetooth/hci_core.h:2069 [inline] hci_conn_hash_flush+0x10b/0x260 net/bluetooth/hci_conn.c:2701 hci_dev_close_sync+0x602/0x11d0 net/bluetooth/hci_sync.c:5225 hci_dev_do_close+0x2e/0x90 net/bluetooth/hci_core.c:483 hci_unregister_dev+0x213/0x620 net/bluetooth/hci_core.c:2678 vhci_release+0x79/0xf0 drivers/bluetooth/hci_vhci.c:665 __fput+0x3ff/0xb70 fs/file_table.c:465 task_work_run+0x14d/0x240 kernel/task_work.c:227 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0xafb/0x2c30 kernel/exit.c:953 do_group_exit+0xd3/0x2a0 kernel/exit.c:1102 __do_sys_exit_group kernel/exit.c:1113 [inline] __se_sys_exit_group kernel/exit.c:1111 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1111 x64_sys_call+0x1530/0x1730 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88804f3e0000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 3152 bytes inside of freed 8192-byte region [ffff88804f3e0000, ffff88804f3e2000) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4f3e0 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff88801b443180 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000 head: 00fff00000000040 ffff88801b443180 dead000000000100 dead000000000122 head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000 head: 00fff00000000003 ffffea00013cf801 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 7807, tgid 7806 (syz.1.523), ts 96378211107, free_ts 96203723607 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1717 prep_new_page mm/page_alloc.c:1725 [inline] get_page_from_freelist+0x1193/0x39b0 mm/page_alloc.c:3652 __alloc_frozen_pages_noprof+0x263/0x23a0 mm/page_alloc.c:4934 alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2301 alloc_slab_page mm/slub.c:2459 [inline] allocate_slab mm/slub.c:2623 [inline] new_slab+0x23c/0x330 mm/slub.c:2676 ___slab_alloc+0xd9c/0x1940 mm/slub.c:3862 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3952 __slab_alloc_node mm/slub.c:4027 [inline] slab_alloc_node mm/slub.c:4188 [inline] __kmalloc_cache_noprof+0xfb/0x3e0 mm/slub.c:4357 kmalloc_noprof include/linux/slab.h:905 [inline] audit_log_d_path+0xe7/0x200 kernel/audit.c:2149 audit_log_d_path_exe+0x46/0x70 kernel/audit.c:2219 audit_log_task+0x31d/0x3f0 kernel/auditsc.c:2957 audit_seccomp+0x79/0x290 kernel/auditsc.c:3004 seccomp_log kernel/seccomp.c:1033 [inline] __seccomp_filter+0x7b6/0xea0 kernel/seccomp.c:1328 __secure_computing+0x287/0x3b0 kernel/seccomp.c:1388 syscall_trace_enter+0x89/0x260 kernel/entry/common.c:52 syscall_enter_from_user_mode_work include/linux/entry-common.h:169 [inline] syscall_enter_from_user_mode include/linux/entry-common.h:199 [inline] do_syscall_64+0x1ee/0x260 arch/x86/entry/syscall_64.c:90 page last free pid 7785 tgid 7785 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1262 [inline] __free_frozen_pages+0x69d/0xff0 mm/page_alloc.c:2680 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4151 [inline] slab_alloc_node mm/slub.c:4200 [inline] kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4207 getname_flags.part.0+0x4c/0x550 fs/namei.c:146 getname_flags+0x93/0xf0 include/linux/audit.h:322 getname include/linux/fs.h:2852 [inline] getname_maybe_null include/linux/fs.h:2859 [inline] getname_maybe_null include/linux/fs.h:2856 [inline] vfs_fstatat+0xe1/0xf0 fs/stat.c:363 __do_sys_newfstatat+0xa1/0x130 fs/stat.c:532 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88804f3e0b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88804f3e0b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88804f3e0c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88804f3e0c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88804f3e0d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================