ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x90 kernel/workqueue.c:1623
WARNING: CPU: 1 PID: 254 at lib/debugobjects.c:505 debug_print_object+0x16e/0x250 lib/debugobjects.c:505
Modules linked in:
CPU: 1 PID: 254 Comm: kworker/u4:3 Not tainted 5.15.0-rc6-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 20 7c 20 89 4c 89 ee 48 c7 c7 20 70 20 89 e8 f9 78 9e 04 <0f> 0b 83 05 75 42 f4 08 01 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e c3
RSP: 0018:ffffc90001edf888 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff89206c00 RDI: fffff520003dbf03
RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880b9f2bf87
R10: ffffed10173e57f0 R11: 657461747320654f R12: ffffffff88cd2980
R13: ffffffff89207660 R14: ffffffff815c5c40 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd9f261e9a0 CR3: 000000001d169000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __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:1675 [inline]
 slab_free_freelist_hook+0xde/0x190 mm/slub.c:1725
 slab_free mm/slub.c:3483 [inline]
 kfree+0xe4/0x530 mm/slub.c:4543
 device_release+0x93/0x200 drivers/base/core.c:2232
 kobject_cleanup lib/kobject.c:705 [inline]
 kobject_release lib/kobject.c:736 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x139/0x410 lib/kobject.c:753
 netdev_run_todo+0x63b/0x910 net/core/dev.c:10604
 default_device_exit_batch+0x2aa/0x360 net/core/dev.c:11574
 cleanup_net+0x423/0x980 net/core/net_namespace.c:591
 process_one_work+0x87f/0x1450 kernel/workqueue.c:2297
 worker_thread+0x598/0x1040 kernel/workqueue.c:2444
 kthread+0x38b/0x460 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295