------------[ cut here ]------------
WARNING: CPU: 0 PID: 1088 at kernel/workqueue.c:1726 is_chained_work kernel/workqueue.c:1672 [inline]
WARNING: CPU: 0 PID: 1088 at kernel/workqueue.c:1726 __queue_work+0xd49/0x1020 kernel/workqueue.c:1725
Modules linked in:
CPU: 0 PID: 1088 Comm: kworker/u4:5 Not tainted 6.6.93-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: netns cleanup_net
RIP: 0010:__queue_work+0xd49/0x1020 kernel/workqueue.c:1725
Code: 4c 89 f7 48 89 de 89 e9 e8 d4 e3 00 00 48 8b 5c 24 10 e9 10 ff ff ff e8 85 39 2f 00 eb 0c e8 7e 39 2f 00 eb 05 e8 77 39 2f 00 <0f> 0b 48 83 c4 78 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 61 39 2f 00
RSP: 0018:ffffc90000007b10 EFLAGS: 00010046
RAX: ffffffff81565d5b RBX: 0000000000000100 RCX: ffff88802370bc00
RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: ffff88806923c1c0 R08: ffffffff8e49a76f R09: 1ffffffff1c934ed
R10: dffffc0000000000 R11: fffffbfff1c934ee R12: 0000000000000008
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff88806923c000
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f57f33c3000 CR3: 000000006a544000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 call_timer_fn+0x16e/0x530 kernel/time/timer.c:1700
 expire_timers kernel/time/timer.c:1746 [inline]
 __run_timers+0x558/0x7d0 kernel/time/timer.c:2022
 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2035
 handle_softirqs+0x280/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xc7/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:lockdep_unregister_key+0x4e6/0x580 kernel/locking/lockdep.c:6490
Code: 44 d3 90 48 c7 c6 80 a3 67 81 e8 e5 08 08 00 e8 a0 1b 08 00 e9 67 fc ff ff e8 76 74 fe 08 41 f7 c4 00 02 00 00 74 d1 fb 84 db <75> d0 eb e1 0f 0b 31 db eb a1 0f 0b e9 fd fe ff ff e8 54 73 fe 08
RSP: 0018:ffffc9000437f420 EFLAGS: 00000202
RAX: ea9a3bac849aaf00 RBX: 0000000000000001 RCX: ea9a3bac849aaf00
RDX: 0000000000000001 RSI: ffffffff8aaabfa0 RDI: ffffffff8afc6780
RBP: ffffc9000437f500 R08: ffffffff90d552af R09: 1ffffffff21aaa55
R10: dffffc0000000000 R11: fffffbfff21aaa56 R12: 0000000000000a06
R13: ffffffff90746d50 R14: ffff88807983f299 R15: 1ffff9200086fe88
 __qdisc_destroy+0x128/0x3c0 net/sched/sch_generic.c:1078
 qdisc_put net/sched/sch_generic.c:1104 [inline]
 dev_shutdown+0x34f/0x440 net/sched/sch_generic.c:1492
 unregister_netdevice_many_notify+0x8d2/0x1810 net/core/dev.c:11064
 unregister_netdevice_many net/core/dev.c:11130 [inline]
 unregister_netdevice_queue+0x324/0x360 net/core/dev.c:11010
 unregister_netdevice include/linux/netdevice.h:3136 [inline]
 _cfg80211_unregister_wdev+0x16b/0x580 net/wireless/core.c:1215
 ieee80211_remove_interfaces+0x496/0x680 net/mac80211/iface.c:2351
 ieee80211_unregister_hw+0x5d/0x2a0 net/mac80211/main.c:1512
 mac80211_hwsim_del_radio+0x274/0x450 drivers/net/wireless/virtual/mac80211_hwsim.c:5408
 hwsim_exit_net+0x585/0x640 drivers/net/wireless/virtual/mac80211_hwsim.c:6285
 ops_exit_list net/core/net_namespace.c:173 [inline]
 cleanup_net+0x6f4/0xb90 net/core/net_namespace.c:652
 process_one_work kernel/workqueue.c:2634 [inline]
 process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
----------------
Code disassembly (best guess):
   0:	44 d3 90 48 c7 c6 80 	rex.R rcll %cl,-0x7f3938b8(%rax)
   7:	a3 67 81 e8 e5 08 08 	movabs %eax,0xe8000808e5e88167
   e:	00 e8
  10:	a0 1b 08 00 e9 67 fc 	movabs 0xfffffc67e900081b,%al
  17:	ff ff
  19:	e8 76 74 fe 08       	call   0x8fe7494
  1e:	41 f7 c4 00 02 00 00 	test   $0x200,%r12d
  25:	74 d1                	je     0xfffffff8
  27:	fb                   	sti
  28:	84 db                	test   %bl,%bl
* 2a:	75 d0                	jne    0xfffffffc <-- trapping instruction
  2c:	eb e1                	jmp    0xf
  2e:	0f 0b                	ud2
  30:	31 db                	xor    %ebx,%ebx
  32:	eb a1                	jmp    0xffffffd5
  34:	0f 0b                	ud2
  36:	e9 fd fe ff ff       	jmp    0xffffff38
  3b:	e8 54 73 fe 08       	call   0x8fe7394