------------[ cut here ]------------
WARNING: CPU: 0 PID: 34 at kernel/workqueue.c:1441 __queue_work+0xddc/0xf90
Modules linked in:
CPU: 0 PID: 34 Comm: kworker/u4:2 Not tainted 6.1.110-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: netns cleanup_net
RIP: 0010:__queue_work+0xddc/0xf90 kernel/workqueue.c:1441
Code: 8b 3c 24 e8 46 a0 88 00 e9 d9 fc ff ff e8 6c 1e 31 00 89 ee 48 c7 c7 80 99 1d 8d e8 5e 20 0b 03 e9 1e fc ff ff e8 54 1e 31 00 <0f> 0b 48 83 c4 50 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 3e 1e 31 00
RSP: 0018:ffffc90000007af8 EFLAGS: 00010046
RAX: ffffffff815990ec RBX: 00000000000b0012 RCX: ffff88801ba91dc0
RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: 0000000000010000 R08: ffffffff815a7e95 R09: fffffbfff1d33c96
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: dffffc0000000000 R14: 0000000000000008 R15: ffff88802bacb000
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff58c8c9440 CR3: 00000000615f8000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1504
 expire_timers kernel/time/timer.c:1544 [inline]
 __run_timers+0x6a8/0x890 kernel/time/timer.c:1820
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571
 __do_softirq kernel/softirq.c:605 [inline]
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x157/0x240 kernel/softirq.c:654
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:666
 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:synchronize_rcu+0x0/0x3f0 kernel/rcu/tree.c:3566
Code: 5e 41 5f e9 62 00 e6 ff 5b 41 5c 41 5e 41 5f c3 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c d9 fe ff ff e8 75 95 6e 00 e9 cf fe ff ff <55> 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec 40 01
RSP: 0018:ffffc90000ab7598 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000156ebc RCX: ffffffff97333103
RDX: 0000000000000001 RSI: ffffffff8b0c1020 RDI: ffffffff8b5d6dc0
RBP: ffffc90000ab7680 R08: dffffc0000000000 R09: fffffbfff2e5c7d7
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888028634298
R13: 1ffff92000156eb8 R14: 0000000000000a03 R15: ffffc90000ab75e0
 lockdep_unregister_key+0x537/0x5e0 kernel/locking/lockdep.c:6355
 __qdisc_destroy+0x127/0x450 net/sched/sch_generic.c:1069
 netdev_for_each_tx_queue include/linux/netdevice.h:2453 [inline]
 dev_shutdown+0x9d/0x440 net/sched/sch_generic.c:1480
 unregister_netdevice_many+0xaac/0x17a0 net/core/dev.c:10873
 ieee80211_remove_interfaces+0x4f0/0x820 net/mac80211/iface.c:2364
 ieee80211_unregister_hw+0x59/0x290 net/mac80211/main.c:1476
 mac80211_hwsim_del_radio+0x2be/0x4a0 drivers/net/wireless/mac80211_hwsim.c:4683
 hwsim_exit_net+0x5b8/0x660 drivers/net/wireless/mac80211_hwsim.c:5470
 ops_exit_list net/core/net_namespace.c:172 [inline]
 cleanup_net+0x6ce/0xb60 net/core/net_namespace.c:604
 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
----------------
Code disassembly (best guess):
   0:	5e                   	pop    %rsi
   1:	41 5f                	pop    %r15
   3:	e9 62 00 e6 ff       	jmp    0xffe6006a
   8:	5b                   	pop    %rbx
   9:	41 5c                	pop    %r12
   b:	41 5e                	pop    %r14
   d:	41 5f                	pop    %r15
   f:	c3                   	ret
  10:	89 f9                	mov    %edi,%ecx
  12:	80 e1 07             	and    $0x7,%cl
  15:	80 c1 03             	add    $0x3,%cl
  18:	38 c1                	cmp    %al,%cl
  1a:	0f 8c d9 fe ff ff    	jl     0xfffffef9
  20:	e8 75 95 6e 00       	call   0x6e959a
  25:	e9 cf fe ff ff       	jmp    0xfffffef9
* 2a:	55                   	push   %rbp <-- trapping instruction
  2b:	48 89 e5             	mov    %rsp,%rbp
  2e:	41 57                	push   %r15
  30:	41 56                	push   %r14
  32:	41 55                	push   %r13
  34:	41 54                	push   %r12
  36:	53                   	push   %rbx
  37:	48 83 e4 e0          	and    $0xffffffffffffffe0,%rsp
  3b:	48                   	rex.W
  3c:	81                   	.byte 0x81
  3d:	ec                   	in     (%dx),%al
  3e:	40                   	rex
  3f:	01                   	.byte 0x1