------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff88816db95490 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350
WARNING: CPU: 1 PID: 19791 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0
Modules linked in:
CPU: 1 UID: 0 PID: 19791 Comm: syz.2.3581 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 47 ed 92 fd 4d 8b 0f 48 c7 c7 00 11 bf 8b 48 8b 34 24 4c 89 ea 89 e9 4d 89 f0 41 54 e8 9a 47 f0 fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 77 55 ea 0a 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc90000a08a00 EFLAGS: 00010296
RAX: b4b359591c5b6400 RBX: dffffc0000000000 RCX: ffff8881a03cba00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 0000000000000000 R08: ffff88823c624293 R09: 1ffff110478c4852
R10: dffffc0000000000 R11: ffffed10478c4853 R12: ffffffff8a39a500
R13: ffffffff8bbf1280 R14: ffff88816db95490 R15: ffffffff8b6cf7a0
FS:  00007f474fdf66c0(0000) GS:ffff8882a9f38000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555572756588 CR3: 000000019f3c4000 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:console_flush_all+0x7f4/0xb10
Code: ff ff e8 5f b0 1f 00 90 0f 0b 90 e9 62 fc ff ff e8 51 b0 1f 00 e8 8c be a6 09 48 85 db 74 c0 e8 42 b0 1f 00 fb 48 8b 5c 24 18 <48> 8b 44 24 20 42 80 3c 20 00 74 08 48 89 df e8 98 71 85 00 48 8b
RSP: 0018:ffffc900034f7200 EFLAGS: 00000293
RAX: ffffffff81a0538e RBX: ffffffff8e767e18 RCX: ffff8881a03cba00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900034f7350 R08: ffffffff8f7cfd77 R09: 1ffffffff1ef9fae
R10: dffffc0000000000 R11: fffffbfff1ef9faf R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffffffff8e767dc0
 console_unlock+0xbb/0x190
 vprintk_emit+0x4c5/0x590
 _printk+0xcf/0x120
 ib_get_eth_speed+0x43f/0x7b0
 siw_query_port+0x3c/0x4a0
 ib_setup_port_attrs+0x24e/0x2070
 add_one_compat_dev+0x3d6/0x5c0
 rdma_dev_init_net+0x1dd/0x270
 ops_init+0x35c/0x5c0
 setup_net+0xfe/0x320
 copy_net_ns+0x34e/0x4e0
 create_new_namespaces+0x3f3/0x720
 unshare_nsproxy_namespaces+0x11c/0x170
 ksys_unshare+0x4c8/0x8c0
 __x64_sys_unshare+0x38/0x50
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4751b8f6c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f474fdf6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f4751de5fa0 RCX: 00007f4751b8f6c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000006a040000
RBP: 00007f4751c11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4751de6038 R14: 00007f4751de5fa0 R15: 00007ffd70417248
 </TASK>
