ODEBUG: free active (active state 0) object: ffff88801fe16e00 object type: work_struct hint: udp_tunnel_nic_device_sync_work+0x0/0xa50
WARNING: CPU: 0 PID: 8018 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0
Modules linked in:
CPU: 0 UID: 0 PID: 8018 Comm: syz.2.510 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 e7 cb 52 fd 4d 8b 0f 48 c7 c7 20 42 e3 8b 48 8b 34 24 4c 89 ea 89 e9 4d 89 f0 41 54 e8 7a f6 b2 fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 77 75 d3 0a 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc9000371ebd8 EFLAGS: 00010286
RAX: 8d394ae80486a600 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc90003839000 RSI: 000000000001e323 RDI: 000000000001e324
RBP: 0000000000000000 R08: ffffffff8fa39837 R09: 1ffffffff1f47306
R10: dffffc0000000000 R11: fffffbfff1f47307 R12: ffffffff8a12bcd0
R13: ffffffff8be343a0 R14: ffff88801fe16e00 R15: ffffffff8b89d340
FS:  00007fbbf4f466c0(0000) GS:ffff8880b8618000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6f0b5056c0 CR3: 0000000023ace000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 debug_check_no_obj_freed+0x3a2/0x470
 kfree+0x112/0x440
 udp_tunnel_nic_netdevice_event+0x1332/0x19f0
 notifier_call_chain+0x1b6/0x3e0
 unregister_netdevice_many_notify+0x14d7/0x1ff0
 unregister_netdevice_queue+0x33c/0x380
 nsim_destroy+0x1dd/0x670
 __nsim_dev_port_del+0x14d/0x1b0
 nsim_dev_reload_destroy+0x288/0x490
 nsim_dev_reload_down+0x8a/0xc0
 devlink_reload+0x1b6/0x8d0
 devlink_nl_reload_doit+0x9c2/0xd50
 genl_family_rcv_msg_doit+0x215/0x300
 genl_rcv_msg+0x60e/0x790
 netlink_rcv_skb+0x208/0x470
 genl_rcv+0x28/0x40
 netlink_unicast+0x82f/0x9e0
 netlink_sendmsg+0x805/0xb30
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x505/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbbf418eba9
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:00007fbbf4f46038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fbbf43d5fa0 RCX: 00007fbbf418eba9
RDX: 0000000000000000 RSI: 0000200000000100 RDI: 0000000000000007
RBP: 00007fbbf4211e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbbf43d6038 R14: 00007fbbf43d5fa0 R15: 00007ffc8b932a68
 </TASK>
