WARNING: CPU: 1 PID: 29256 at lib/debugobjects.c:612 debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612 Modules linked in: CPU: 1 UID: 0 PID: 29256 Comm: syz.4.5521 Tainted: G U 6.16.0-rc2-syzkaller-00378-gb67ec639010f #0 PREEMPT(full) Tainted: [U]=USER 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 80 75 15 8c 4c 89 e6 48 c7 c7 00 6a 15 8c e8 ff 8a 9c fc 90 <0f> 0b 90 90 58 83 05 16 49 ca 0b 01 48 83 c4 18 5b 5d 41 5c 41 5d RSP: 0018:ffffc90004f87768 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff817aa1a8 RDX: ffff88802369bc00 RSI: ffffffff817aa1b5 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 00000000000af680 R12: ffffffff8c1570a0 R13: ffffffff8bafe840 R14: ffffffff8a87a800 R15: ffffc90004f87868 FS: 0000000000000000(0000) GS:ffff88812485f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa9addb5f40 CR3: 0000000060248000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __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:2752 bt_host_release+0x6a/0xb0 net/bluetooth/hci_sysfs.c:87 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+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+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+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: 0033:0x7f01f61c11e5 Code: Unable to access opcode bytes at 0x7f01f61c11bb. RSP: 002b:00007f01f6f25f80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6 RAX: fffffffffffffdfc RBX: 00007f01f63b6160 RCX: 00007f01f61c11e5 RDX: 00007f01f6f25fc0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f01f6210b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f01f63b6160 R15: 00007ffe7d025258