batman_adv: batadv0: Removing interface: batadv_slave_0
batman_adv: batadv0: Removing interface: batadv_slave_1
team0 (unregistering): Port device team_slave_1 removed
team0 (unregistering): Port device team_slave_0 removed
------------[ cut here ]------------
ida_free called for id=954 which is not allocated.
WARNING: CPU: 1 PID: 6135 at lib/idr.c:592 ida_free+0x1f9/0x2e0 lib/idr.c:592
Modules linked in:
CPU: 1 UID: 0 PID: 6135 Comm: kworker/u8:11 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: netns cleanup_net
RIP: 0010:ida_free+0x1f9/0x2e0 lib/idr.c:592
Code: 78 f6 41 83 fe 3e 76 72 e8 c4 9e 78 f6 48 8b 7c 24 28 4c 89 ee e8 d7 33 0d 00 90 48 c7 c7 e0 63 cf 8c 89 ee e8 08 2f 37 f6 90 <0f> 0b 90 90 e8 9e 9e 78 f6 48 b8 00 00 00 00 00 fc ff df 48 01 c3
RSP: 0018:ffffc9000b1b7460 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 1ffff92001636e8d RCX: ffffffff81795e88
RDX: ffff88802ce60000 RSI: ffffffff81795e95 RDI: 0000000000000001
RBP: 00000000000003ba R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88801e2ff000
R13: 0000000000000293 R14: 00000000000003ba R15: ffff88801e2ff070
FS:  0000000000000000(0000) GS:ffff888124f82000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000032000 CR3: 000000000df80000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 proc_free_inum fs/proc/generic.c:216 [inline]
 pde_put fs/proc/generic.c:696 [inline]
 pde_put+0xa9/0x1d0 fs/proc/generic.c:693
 remove_proc_subtree+0x487/0x5e0 fs/proc/generic.c:796
 proc_remove fs/proc/generic.c:811 [inline]
 proc_remove+0x6a/0x90 fs/proc/generic.c:808
 snmp6_unregister_dev+0xc4/0x140 net/ipv6/proc.c:274
 addrconf_ifdown.isra.0+0x44d/0x1aa0 net/ipv6/addrconf.c:3870
 addrconf_notify+0x220/0x19e0 net/ipv6/addrconf.c:3776
 notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2229
 call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
 call_netdevice_notifiers net/core/dev.c:2281 [inline]
 unregister_netdevice_many_notify+0xf76/0x24c0 net/core/dev.c:12166
 unregister_netdevice_many net/core/dev.c:12229 [inline]
 default_device_exit_batch+0x853/0xaf0 net/core/dev.c:12733
 ops_exit_list net/core/net_namespace.c:205 [inline]
 ops_undo_list+0x363/0xab0 net/core/net_namespace.c:252
 cleanup_net+0x41b/0x8b0 net/core/net_namespace.c:695
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x56d/0x730 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>