bond0 (unregistering): (slave bond_slave_1): Releasing backup interface bond0 (unregistering): (slave bond_slave_0): Releasing backup interface bond0 (unregistering): Released all slaves ------------[ cut here ]------------ ODEBUG: free active (active state 0) object type: timer_list hint: batadv_dat_purge+0x0/0x4f0 WARNING: CPU: 1 PID: 11 at lib/debugobjects.c:505 debug_print_object lib/debugobjects.c:502 [inline] WARNING: CPU: 1 PID: 11 at lib/debugobjects.c:505 __debug_check_no_obj_freed lib/debugobjects.c:989 [inline] WARNING: CPU: 1 PID: 11 at lib/debugobjects.c:505 debug_check_no_obj_freed+0x46b/0x650 lib/debugobjects.c:1020 Modules linked in: CPU: 1 PID: 11 Comm: kworker/u4:1 Not tainted 5.18.0-syzkaller-11972-gd1dc87763f40 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net RIP: 0010:debug_print_object lib/debugobjects.c:502 [inline] RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:989 [inline] RIP: 0010:debug_check_no_obj_freed+0x46b/0x650 lib/debugobjects.c:1020 Code: 48 89 ef e8 87 c1 a4 fd 48 8b 13 4c 8b 45 00 48 c7 c7 60 a1 e9 8a 48 c7 c6 40 9e e9 8a 44 89 f1 4d 89 f9 31 c0 e8 15 72 1a fd <0f> 0b 48 ba 00 00 00 00 00 fc ff df ff 05 0f f9 cd 09 48 8b 5c 24 RSP: 0000:ffffc90000107778 EFLAGS: 00010246 RAX: 83d2758310f96a00 RBX: ffffffff8ae9a1d8 RCX: ffff88813fe8bb00 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffffffff8a8f65a0 R08: ffffffff816bce0d R09: ffffed1017364f14 R10: ffffed1017364f14 R11: 1ffff11017364f13 R12: ffff888070b20474 R13: ffff888070b20480 R14: 0000000000000000 R15: ffffffff8a025dc0 FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f86d0fb8fb4 CR3: 0000000026502000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: slab_free_hook mm/slub.c:1702 [inline] slab_free_freelist_hook+0xcf/0x1a0 mm/slub.c:1753 slab_free mm/slub.c:3507 [inline] kfree+0xc6/0x210 mm/slub.c:4555 device_release+0x98/0x1c0 kobject_cleanup+0x235/0x470 lib/kobject.c:673 netdev_run_todo+0xf7c/0x1070 net/core/dev.c:10358 default_device_exit_batch+0x665/0x6d0 net/core/dev.c:11329 ops_exit_list net/core/net_namespace.c:167 [inline] cleanup_net+0x80c/0xc50 net/core/net_namespace.c:594 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30