bond0 (unregistering): (slave wlan1): Releasing backup interface
bond0 (unregistering): Released all slaves
¶: left promiscuous mode
------------[ cut here ]------------
ida_free called for id=956 which is not allocated.
WARNING: CPU: 0 PID: 18249 at lib/idr.c:592 ida_free+0x280/0x310 lib/idr.c:592
Modules linked in:
CPU: 0 UID: 0 PID: 18249 Comm: kworker/u8:4 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+0x280/0x310 lib/idr.c:592
Code: 00 00 00 00 fc ff df 48 8b 5c 24 10 48 8b 7c 24 40 48 89 de e8 71 2c 0c 00 90 48 c7 c7 a0 7b 76 8c 44 89 fe e8 41 11 54 f6 90 <0f> 0b 90 90 eb 34 e8 85 a2 90 f6 49 bd 00 00 00 00 00 fc ff df eb
RSP: 0018:ffffc9000c117000 EFLAGS: 00010246
RAX: f4b3a9277f2c5800 RBX: 0000000000000a02 RCX: ffff88807af09e40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffc9000c1170f8 R08: ffff8880b8824293 R09: 1ffff11017104852
R10: dffffc0000000000 R11: ffffed1017104853 R12: 1ffff92001822e04
R13: dffffc0000000000 R14: ffff88801dede000 R15: 00000000000003bc
FS:  0000000000000000(0000) GS:ffff888126373000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555d8b609000 CR3: 000000000db36000 CR4: 00000000003526f0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000082
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 proc_free_inum fs/proc/generic.c:216 [inline]
 pde_put+0x7e/0x1b0 fs/proc/generic.c:696
 remove_proc_subtree+0x3e8/0x530 fs/proc/generic.c:796
 snmp6_unregister_dev+0xae/0xf0 net/ipv6/proc.c:274
 addrconf_ifdown+0x240/0x1880 net/ipv6/addrconf.c:3870
 addrconf_notify+0x1bc/0x1010 net/ipv6/addrconf.c:-1
 notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
 call_netdevice_notifiers net/core/dev.c:2281 [inline]
 unregister_netdevice_many_notify+0x14d7/0x1ff0 net/core/dev.c:12166
 unregister_netdevice_many net/core/dev.c:12229 [inline]
 unregister_netdevice_queue+0x33c/0x380 net/core/dev.c:12073
 unregister_netdevice include/linux/netdevice.h:3385 [inline]
 _cfg80211_unregister_wdev+0x165/0x590 net/wireless/core.c:1275
 ieee80211_remove_interfaces+0x49a/0x6e0 net/mac80211/iface.c:2391
 ieee80211_unregister_hw+0x5d/0x2c0 net/mac80211/main.c:1669
 mac80211_hwsim_del_radio+0x275/0x460 drivers/net/wireless/virtual/mac80211_hwsim.c:5674
 hwsim_exit_net+0x584/0x640 drivers/net/wireless/virtual/mac80211_hwsim.c:6554
 ops_exit_list net/core/net_namespace.c:199 [inline]
 ops_undo_list+0x49a/0x990 net/core/net_namespace.c:252
 cleanup_net+0x4d8/0x820 net/core/net_namespace.c:695
 process_one_work kernel/workqueue.c:3263 [inline]
 process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3346
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x436/0x7d0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>