------------[ cut here ]------------
ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x90 include/linux/find.h:144
WARNING: CPU: 0 PID: 1216 at lib/debugobjects.c:505 debug_print_object+0x16e/0x250 lib/debugobjects.c:505
Modules linked in:
CPU: 0 PID: 1216 Comm: kworker/u4:6 Not tainted 5.17.0-rc6-next-20220303-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
RIP: 0010:debug_print_object+0x16e/0x250 lib/debugobjects.c:505
Code: ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 af 00 00 00 48 8b 14 dd 80 bd 26 8a 4c 89 ee 48 c7 c7 80 b1 26 8a e8 4e 0c 27 05 <0f> 0b 83 05 25 ea c3 09 01 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e c3
RSP: 0000:ffffc9000569f850 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: ffff88801e739d40 RSI: ffffffff81602878 RDI: fffff52000ad3efc
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff815fd23e R11: 0000000000000000 R12: ffffffff89ce5c00
R13: ffffffff8a26b660 R14: ffffffff816774d0 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f95609b7378 CR3: 000000006c147000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __debug_check_no_obj_freed lib/debugobjects.c:992 [inline]
 debug_check_no_obj_freed+0x301/0x420 lib/debugobjects.c:1023
 slab_free_hook mm/slub.c:1703 [inline]
 slab_free_freelist_hook+0xeb/0x1c0 mm/slub.c:1754
 slab_free mm/slub.c:3523 [inline]
 kfree+0xd6/0x4d0 mm/slub.c:4576
 kvfree+0x42/0x50 mm/util.c:613
 device_release+0x9f/0x240 drivers/base/core.c:2229
 kobject_cleanup lib/kobject.c:705 [inline]
 kobject_release lib/kobject.c:736 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1c8/0x540 lib/kobject.c:753
 netdev_run_todo+0x72e/0x10b0 net/core/dev.c:9981
 default_device_exit_batch+0x44e/0x590 net/core/dev.c:10918
 ops_exit_list+0x125/0x170 net/core/net_namespace.c:167
 cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:594
 process_one_work+0x996/0x1610 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e9/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>