------------[ cut here ]------------ ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x10 arch/x86/include/asm/paravirt.h:653 WARNING: CPU: 1 PID: 15677 at lib/debugobjects.c:508 debug_print_object+0x67/0x80 lib/debugobjects.c:505 Modules linked in: CPU: 1 PID: 15677 Comm: syz-executor.4 Not tainted 5.10.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:debug_print_object+0x67/0x80 lib/debugobjects.c:505 Code: 8b 43 10 83 c2 01 4c 89 e6 48 c7 c7 48 d3 f6 83 89 15 51 b7 3a 04 8b 4b 14 4c 8b 45 00 48 8b 14 c5 60 54 7a 83 e8 d0 38 2f 01 <0f> 0b 5b 83 05 db 7e a6 02 01 5d 41 5c c3 83 05 d0 7e a6 02 01 c3 RSP: 0018:ffffc9000279fd18 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffff88811ce5d550 RCX: 0000000000000001 RDX: 0000000080000001 RSI: ffffffff840741e9 RDI: 00000000ffffffff RBP: ffffffff8362dc80 R08: 0000000000000000 R09: c0000000ffffdfff R10: ffffc9000279fb48 R11: ffffc9000279fb40 R12: ffffffff83f4b184 R13: ffff88811ce5d550 R14: 0000000000000000 R15: ffffffff8362dc80 FS: 0000000000000000(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000562a13723e48 CR3: 000000010f060000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __debug_check_no_obj_freed lib/debugobjects.c:987 [inline] debug_check_no_obj_freed+0x1bb/0x1e0 lib/debugobjects.c:1018 kfree+0xf9/0x280 mm/slab.c:3757 bt_host_release+0xc/0x20 net/bluetooth/hci_sysfs.c:86 device_release+0x2b/0x80 drivers/base/core.c:1806 kobject_cleanup lib/kobject.c:705 [inline] kobject_release lib/kobject.c:736 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x5f/0xc0 lib/kobject.c:753 vhci_release+0x32/0x60 drivers/bluetooth/hci_vhci.c:341 __fput+0xaa/0x250 fs/file_table.c:281 task_work_run+0x68/0xb0 kernel/task_work.c:151 exit_task_work include/linux/task_work.h:30 [inline] do_exit+0x3b0/0xc90 kernel/exit.c:809 do_group_exit+0x42/0xb0 kernel/exit.c:906 __do_sys_exit_group kernel/exit.c:917 [inline] __se_sys_exit_group kernel/exit.c:915 [inline] __x64_sys_exit_group+0xf/0x10 kernel/exit.c:915 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45cce9 Code: Unable to access opcode bytes at RIP 0x45ccbf. RSP: 002b:00007ffc793ef438 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000045cce9 RDX: 0000000000416741 RSI: 0000000000ca85f0 RDI: 0000000000000043 RBP: 00000000004c2983 R08: 000000000000000b R09: 0000000000000000 R10: 0000000001ee6940 R11: 0000000000000246 R12: 0000000000000005 R13: 00007ffc793ef580 R14: 0000000000058ece R15: 00007ffc793ef590