------------[ cut here ]------------ ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x90 arch/x86/include/asm/paravirt.h:658 WARNING: CPU: 0 PID: 15313 at lib/debugobjects.c:505 debug_print_object+0x160/0x250 lib/debugobjects.c:505 Modules linked in: CPU: 0 PID: 15313 Comm: syz-executor.3 Not tainted 5.12.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:debug_print_object+0x160/0x250 lib/debugobjects.c:505 Code: dd 80 9e 12 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd 80 9e 12 88 48 c7 c7 a0 93 12 88 e8 08 98 ea 03 <0f> 0b 83 05 e3 02 e7 06 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 RSP: 0018:ffffc9000202fbc8 EFLAGS: 00010082 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000004 RDI: fffff52000405f6b RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8881f642095b R10: ffffed103ec8412b R11: 657461747320654f R12: ffffffff87cced00 R13: ffffffff815be1d0 R14: dead000000000100 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8881f6400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000005351f4 CR3: 0000000122b43000 CR4: 0000000000350ef0 Call Trace: __debug_check_no_obj_freed lib/debugobjects.c:987 [inline] debug_check_no_obj_freed+0x301/0x420 lib/debugobjects.c:1018 kfree+0xf7/0x2d0 mm/slab.c:3795 bt_host_release+0xc/0x20 net/bluetooth/hci_sysfs.c:86 device_release+0x93/0x200 drivers/base/core.c:2108 kobject_cleanup lib/kobject.c:705 [inline] kobject_release lib/kobject.c:736 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0xf6/0x1d0 lib/kobject.c:753 vhci_release+0x6a/0xd0 drivers/bluetooth/hci_vhci.c:341 __fput+0x209/0x870 fs/file_table.c:280 task_work_run+0xc0/0x160 kernel/task_work.c:140 exit_task_work include/linux/task_work.h:30 [inline] do_exit+0xac8/0x25b0 kernel/exit.c:825 do_group_exit+0xe7/0x290 kernel/exit.c:922 __do_sys_exit_group kernel/exit.c:933 [inline] __se_sys_exit_group kernel/exit.c:931 [inline] __x64_sys_exit_group+0x35/0x40 kernel/exit.c:931 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x464769 Code: Unable to access opcode bytes at RIP 0x46473f. RSP: 002b:00007fffa2b16778 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00000000000000e4 RCX: 0000000000464769 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000043 RBP: 00000000004ae1d2 R08: 000000000000000b R09: 0000000000060aa5 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000060dd8 R14: 0000000000060aa5 R15: 0000000000000005 irq event stamp: 1251420 hardirqs last enabled at (1251419): [] kfree+0x22c/0x2d0 mm/slab.c:3797 hardirqs last disabled at (1251420): [] kfree+0x136/0x2d0 mm/slab.c:3786 softirqs last enabled at (1251168): [] invoke_softirq kernel/softirq.c:221 [inline] softirqs last enabled at (1251168): [] __irq_exit_rcu kernel/softirq.c:422 [inline] softirqs last enabled at (1251168): [] irq_exit_rcu+0x237/0x280 kernel/softirq.c:434 softirqs last disabled at (1251143): [] invoke_softirq kernel/softirq.c:221 [inline] softirqs last disabled at (1251143): [] __irq_exit_rcu kernel/softirq.c:422 [inline] softirqs last disabled at (1251143): [] irq_exit_rcu+0x237/0x280 kernel/softirq.c:434 ---[ end trace 475cb7d4fa997fed ]---