------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff88807b3b94f8 object type: timer_list hint: batadv_dat_purge+0x0/0x490
WARNING: CPU: 1 PID: 23155 at lib/debugobjects.c:508 debug_print_object lib/debugobjects.c:505 [inline]
WARNING: CPU: 1 PID: 23155 at lib/debugobjects.c:508 __debug_check_no_obj_freed lib/debugobjects.c:1023 [inline]
WARNING: CPU: 1 PID: 23155 at lib/debugobjects.c:508 debug_check_no_obj_freed+0x488/0x650 lib/debugobjects.c:1054
Modules linked in:
CPU: 1 PID: 23155 Comm: syz-executor.4 Not tainted 6.4.0-rc5-syzkaller-00016-ga4d7d7011219 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
RIP: 0010:debug_print_object lib/debugobjects.c:505 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:1023 [inline]
RIP: 0010:debug_check_no_obj_freed+0x488/0x650 lib/debugobjects.c:1054
Code: aa fd 49 8b 16 4c 8b 4d 00 48 c7 c7 e0 4d 38 8b 48 c7 c6 a0 4a 38 8b 8b 0c 24 49 89 d8 ff 74 24 30 e8 cc f6 19 fd 48 83 c4 08 <0f> 0b 48 ba 00 00 00 00 00 fc ff df 4c 8b 74 24 38 ff 05 29 fa 1c
RSP: 0018:ffffc9000496f100 EFLAGS: 00010296
RAX: 29b77bfdf02d9900 RBX: ffff88807b3b94f8 RCX: 0000000000040000
RDX: ffffc900148fa000 RSI: 0000000000038e25 RDI: 0000000000038e26
RBP: ffffffff8aec6a20 R08: ffffffff81530142 R09: fffff5200092dd99
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff8aec6a20
R13: ffffffff8aec6a20 R14: ffffffff8b384e78 R15: ffff888079b90328
FS:  00007fa82c0b1700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000204d4000 CR3: 0000000086624000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 slab_free_hook mm/slub.c:1756 [inline]
 slab_free_freelist_hook mm/slub.c:1807 [inline]
 slab_free mm/slub.c:3786 [inline]
 __kmem_cache_free+0x20d/0x3c0 mm/slub.c:3799
 device_release+0x95/0x1c0
 kobject_cleanup lib/kobject.c:683 [inline]
 kobject_release lib/kobject.c:714 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x228/0x470 lib/kobject.c:731
 netdev_run_todo+0xe5a/0xf50 net/core/dev.c:10400
 rtnl_unlock net/core/rtnetlink.c:151 [inline]
 rtnetlink_rcv_msg+0xa55/0xf40 net/core/rtnetlink.c:6418
 netlink_rcv_skb+0x1df/0x430 net/netlink/af_netlink.c:2546
 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
 netlink_unicast+0x7c3/0x990 net/netlink/af_netlink.c:1365
 netlink_sendmsg+0xa2a/0xd60 net/netlink/af_netlink.c:1913
 sock_sendmsg_nosec net/socket.c:724 [inline]
 sock_sendmsg net/socket.c:747 [inline]
 ____sys_sendmsg+0x58f/0x890 net/socket.c:2503
 ___sys_sendmsg net/socket.c:2557 [inline]
 __sys_sendmsg+0x2ad/0x390 net/socket.c:2586
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fa82b28c169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa82c0b1168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fa82b3abf80 RCX: 00007fa82b28c169
RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003
RBP: 00007fa82b2e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc480f61af R14: 00007fa82c0b1300 R15: 0000000000022000
 </TASK>