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ODEBUG: free active (active state 0) object: ffff888174597c90 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350
WARNING: CPU: 1 PID: 10085 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0
Modules linked in:
CPU: 1 UID: 0 PID: 10085 Comm: kworker/1:11 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
Workqueue: events iterate_cleanup_work
RIP: 0010:debug_print_object+0x16b/0x1e0
Code: 4c 89 ff e8 77 e4 92 fd 4d 8b 0f 48 c7 c7 80 0f bf 8b 48 8b 34 24 4c 89 ea 89 e9 4d 89 f0 41 54 e8 4a 4b f0 fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 57 36 ea 0a 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc90000a08a00 EFLAGS: 00010296
RAX: ece5dc6389ecd200 RBX: dffffc0000000000 RCX: ffff888170d5d700
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bba650 R12: ffffffff8a390410
R13: ffffffff8bbf1100 R14: ffff888174597c90 R15: ffffffff8b6cf600
FS:  0000000000000000(0000) GS:ffff8882a9f3e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5b496cbd58 CR3: 000000002bed8000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 debug_check_no_obj_freed+0x3a2/0x470
 kfree+0x115/0x6d0
 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:__sanitizer_cov_trace_pc+0x18/0x70
Code: cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 08 20 6e 92 65 8b 15 a8 1b ae 10 <81> e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 7c 16 00 00
RSP: 0018:ffffc9000998f908 EFLAGS: 00000202
RAX: ffffffff8971ea25 RBX: ffffc9000998f9c0 RCX: ffff888170d5d700
RDX: 0000000080000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff8f7cdb77 R09: 1ffffffff1ef9b6e
R10: dffffc0000000000 R11: fffffbfff1ef9b6f R12: 1ffff110210b252f
R13: ffff888108592978 R14: dffffc0000000000 R15: 1ffff92001331f38
 nf_ct_iterate_cleanup+0x4d5/0x520
 iterate_cleanup_work+0xdb/0x1f0
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x4bc/0x870
 ret_from_fork_asm+0x1a/0x30
 </TASK>
