------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff888031929318 object type: timer_list hint: hci_devcd_timeout+0x0/0x2e0 net/bluetooth/coredump.c:232
WARNING: CPU: 0 PID: 9976 at lib/debugobjects.c:612 debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612
Modules linked in:
CPU: 0 UID: 0 PID: 9976 Comm: syz.2.847 Not tainted 6.16.0-rc4-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612
Code: fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 54 41 56 48 8b 14 dd 00 77 15 8c 4c 89 e6 48 c7 c7 80 6b 15 8c e8 4f 22 9c fc 90 <0f> 0b 90 90 58 83 05 16 dc c9 0b 01 48 83 c4 18 5b 5d 41 5c 41 5d
RSP: 0018:ffffc900192df768 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff817aa1f8
RDX: ffff88802702bc00 RSI: ffffffff817aa205 RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: fffffffffffde8b8 R12: ffffffff8c157220
R13: ffffffff8bafe800 R14: ffffffff8a886550 R15: ffffc900192df868
FS:  0000000000000000(0000) GS:ffff88812475f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000000b000 CR3: 0000000053c1e000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __debug_check_no_obj_freed lib/debugobjects.c:1099 [inline]
 debug_check_no_obj_freed+0x4b7/0x600 lib/debugobjects.c:1129
 slab_free_hook mm/slub.c:2312 [inline]
 slab_free mm/slub.c:4643 [inline]
 kfree+0x28f/0x4d0 mm/slub.c:4842
 hci_release_dev+0x4d8/0x600 net/bluetooth/hci_core.c:2778
 bt_host_release+0x6a/0xb0 net/bluetooth/hci_sysfs.c:87
 device_release+0xa4/0x240 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+0x1e7/0x5a0 lib/kobject.c:737
 put_device+0x1f/0x30 drivers/base/core.c:3800
 vhci_release+0x81/0xf0 drivers/bluetooth/hci_vhci.c:666
 __fput+0x402/0xb70 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+0x86c/0x2bd0 kernel/exit.c:964
 do_group_exit+0xd3/0x2a0 kernel/exit.c:1105
 get_signal+0x2673/0x26d0 kernel/signal.c:3034
 arch_do_signal_or_restart+0x8f/0x790 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop+0x84/0x110 kernel/entry/common.c:111
 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
 do_syscall_64+0x3f6/0x490 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2335f8e929
Code: Unable to access opcode bytes at 0x7f2335f8e8ff.
RSP: 002b:00007f2336d7d0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f23361b5fa8 RCX: 00007f2335f8e929
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f23361b5fa8
RBP: 00007f23361b5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f23361b5fac
R13: 0000000000000000 R14: 00007fffe868c920 R15: 00007fffe868ca08
 </TASK>