------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff88801c1cd4f8 object type: timer_list hint: batadv_dat_purge+0x0/0x70 net/batman-adv/distributed-arp-table.c:171
WARNING: CPU: 2 PID: 5196 at lib/debugobjects.c:505 debug_print_object+0x194/0x2c0 lib/debugobjects.c:505
Modules linked in:
CPU: 2 PID: 5196 Comm: kworker/u16:2 Not tainted 6.4.0-rc4-syzkaller-00265-g4ecd704a4c51 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Workqueue: netns cleanup_net
RIP: 0010:debug_print_object+0x194/0x2c0 lib/debugobjects.c:505
Code: df 48 89 fe 48 c1 ee 03 80 3c 16 00 0f 85 c7 00 00 00 48 8b 14 dd c0 24 a7 8a 50 4c 89 ee 48 c7 c7 20 18 a7 8a e8 fc a5 34 fd <0f> 0b 58 83 05 a6 56 63 0a 01 48 83 c4 20 5b 5d 41 5c 41 5d 41 5e
RSP: 0018:ffffc90004577860 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: ffff88801ea62400 RSI: ffffffff814c03a7 RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 203a47554245444f R12: ffffffff8a4ed280
R13: ffffffff8aa71e80 R14: ffff88801b7e2de0 R15: ffffffff8172bf00
FS:  0000000000000000(0000) GS:ffff88802c800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa5303e7440 CR3: 0000000077bb9000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __debug_check_no_obj_freed lib/debugobjects.c:1023 [inline]
 debug_check_no_obj_freed+0x305/0x420 lib/debugobjects.c:1054
 slab_free_hook mm/slub.c:1756 [inline]
 slab_free_freelist_hook+0xeb/0x1c0 mm/slub.c:1807
 slab_free mm/slub.c:3786 [inline]
 __kmem_cache_free+0xaf/0x2d0 mm/slub.c:3799
 kvfree+0x46/0x50 mm/util.c:650
 device_release+0xa3/0x240 drivers/base/core.c:2484
 kobject_cleanup lib/kobject.c:683 [inline]
 kobject_release lib/kobject.c:714 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1c2/0x4d0 lib/kobject.c:731
 netdev_run_todo+0x762/0x1100 net/core/dev.c:10400
 default_device_exit_batch+0x456/0x5b0 net/core/dev.c:11392
 ops_exit_list+0x125/0x170 net/core/net_namespace.c:175
 cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:614
 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
 kthread+0x344/0x440 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>