------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff888023cd3090 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350
WARNING: CPU: 1 PID: 3 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0
Modules linked in:
CPU: 1 UID: 0 PID: 3 Comm: pool_workqueue_ Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:debug_print_object+0x16b/0x1e0
Code: 4c 89 ff e8 17 93 52 fd 4d 8b 0f 48 c7 c7 a0 45 e3 8b 48 8b 34 24 4c 89 ea 89 e9 4d 89 f0 41 54 e8 ba bb b2 fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 b7 38 d3 0a 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc900001e0a10 EFLAGS: 00010292
RAX: a2cc7b62dc6a7a00 RBX: dffffc0000000000 RCX: ffff88810003b980
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfa22c R12: ffffffff8a6d31e0
R13: ffffffff8be34720 R14: ffff888023cd3090 R15: ffffffff8b8ce260
FS:  0000000000000000(0000) GS:ffff8881a3c15000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff6a4374c80 CR3: 0000000100ad8000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 debug_check_no_obj_freed+0x3a2/0x470
 kfree+0x112/0x440
 rose_timer_expiry+0x4cb/0x600
 call_timer_fn+0x17e/0x5f0
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0xb7/0x180
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:preempt_schedule_irq+0xb0/0x150
Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 ab a8 14 f6 e8 16 05 4c f6 fb bf 01 00 00 00 <e8> 5b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc90000067aa0 EFLAGS: 00000286
RAX: a2cc7b62dc6a7a00 RBX: 0000000000000000 RCX: a2cc7b62dc6a7a00
RDX: 0000000000000000 RSI: ffffffff8d9b9cae RDI: 0000000000000001
RBP: ffffc90000067b40 R08: ffffffff8fa3a637 R09: 1ffffffff1f474c6
R10: dffffc0000000000 R11: fffffbfff1f474c7 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200000cf54
 irqentry_exit+0x6f/0x90
 asm_sysvec_call_function_single+0x1a/0x20
RIP: 0010:lockdep_unregister_key+0x2c5/0x310
Code: 65 48 8b 05 4d 1d 03 11 48 3b 44 24 10 0f 84 26 fe ff ff e8 0d a4 dc 09 e8 38 a5 dc 09 41 f7 c7 00 02 00 00 74 bd fb 40 84 ed <75> bc eb cd 90 0f 0b 90 e9 19 ff ff ff 90 0f 0b 90 e9 2a ff ff ff
RSP: 0018:ffffc90000067c00 EFLAGS: 00000246
RAX: a2cc7b62dc6a7a00 RBX: ffff888039102138 RCX: a2cc7b62dc6a7a00
RDX: ffffffff93647338 RSI: ffffffff8d9cd7dc RDI: ffffffff8be33c00
RBP: ffff888039102100 R08: 0000000000000000 R09: ffffffff81aa9548
R10: dffffc0000000000 R11: fffffbfff1f474c7 R12: 0000000000000000
R13: 0000000000001000 R14: 0000000000000001 R15: 0000000000000a03
 pwq_release_workfn+0x6d5/0x870
 kthread_worker_fn+0x507/0xb60
 kthread+0x711/0x8a0
 ret_from_fork+0x439/0x7d0
 ret_from_fork_asm+0x1a/0x30
 </TASK>
