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ODEBUG: free active (active state 0) object: ffff888028d594f8 object type: timer_list hint: batadv_dat_purge+0x0/0x400
WARNING: CPU: 1 PID: 5899 at lib/debugobjects.c:512 debug_check_no_obj_freed+0x488/0x650
Modules linked in:
CPU: 1 PID: 5899 Comm: kworker/u4:11 Not tainted 6.3.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Workqueue: netns cleanup_net
RIP: 0010:debug_check_no_obj_freed+0x488/0x650
Code: f2 fd 49 8b 16 4c 8b 4d 00 48 c7 c7 60 24 1a 8a 48 c7 c6 20 21 1a 8a 8b 0c 24 49 89 d8 ff 74 24 30 e8 8c a4 7a fd 48 83 c4 08 <0f> 0b 48 ba 00 00 00 00 00 fc ff df 4c 8b 74 24 38 ff 05 6d e5 54
RSP: 0018:ffffc90004c1f7d0 EFLAGS: 00010292
RAX: 252507a09ce08300 RBX: ffff888028d594f8 RCX: 0000000000000002
RDX: dffffc0000000000 RSI: ffffffff89ca8f60 RDI: 0000000000000001
RBP: ffffffff89cc6b00 R08: dffffc0000000000 R09: fffffbfff1dd0c3a
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff89cc6b00
R13: ffffffff89cc6b00 R14: ffffffff8a1a24f8 R15: ffff88802918a328
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000560ff14cb920 CR3: 000000001aa3e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __kmem_cache_free+0x20d/0x3c0
 device_release+0x91/0x190
 kobject_put+0x1cd/0x3a0
 netdev_run_todo+0xc82/0xd40
 default_device_exit_batch+0x3f3/0x560
 cleanup_net+0x6d4/0xa30
 process_one_work+0x7f3/0xf50
 worker_thread+0x8c9/0xfd0
 kthread+0x232/0x2b0
 ret_from_fork+0x1f/0x30
 </TASK>