------------[ cut here ]------------
Have pending ack frames!
WARNING: net/mac80211/main.c:1712 at 0x0, CPU#1: kworker/u8:1/13
Modules linked in:
CPU: 1 UID: 0 PID: 13 Comm: kworker/u8:1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: netns cleanup_net
RIP: 0010:ieee80211_free_ack_frame+0x14/0x40 net/mac80211/main.c:1712
Code: 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 53 48 89 f3 e8 13 4b f0 f6 48 8d 3d bc 91 02 05 <67> 48 0f b9 3a 31 ff 48 89 de ba 02 00 00 00 e8 f8 14 69 fe 31 c0
RSP: 0018:ffffc900001275b0 EFLAGS: 00010293
RAX: ffffffff8ad1a87d RBX: ffff88802ecb0b40 RCX: ffff88801d6b8000
RDX: 0000000000000000 RSI: ffff88802ecb0b40 RDI: ffffffff8fd43a40
RBP: ffffc900001276b8 R08: ffffc9000012762f R09: 0000000000000000
R10: ffffc90000127620 R11: ffffffff8ad1a870 R12: ffffc90000127620
R13: ffff88805a0223f0 R14: ffff888027ef2ff8 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff888125aed000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff442e5748 CR3: 0000000074554000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 idr_for_each+0x1b5/0x290 lib/idr.c:210
 ieee80211_free_hw+0x44/0x3d0 net/mac80211/main.c:1724
 mac80211_hwsim_del_radio+0x2de/0x460 drivers/net/wireless/virtual/mac80211_hwsim.c:5919
 hwsim_exit_net+0xef4/0xfb0 drivers/net/wireless/virtual/mac80211_hwsim.c:6807
 ops_exit_list net/core/net_namespace.c:199 [inline]
 ops_undo_list+0x49a/0x990 net/core/net_namespace.c:252
 cleanup_net+0x4d8/0x7a0 net/core/net_namespace.c:696
 process_one_work+0x93a/0x15a0 kernel/workqueue.c:3261
 process_scheduled_works kernel/workqueue.c:3344 [inline]
 worker_thread+0x9b0/0xee0 kernel/workqueue.c:3425
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
----------------
Code disassembly (best guess):
   0:	84 00                	test   %al,(%rax)
   2:	00 00                	add    %al,(%rax)
   4:	00 00                	add    %al,(%rax)
   6:	90                   	nop
   7:	90                   	nop
   8:	90                   	nop
   9:	90                   	nop
   a:	90                   	nop
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	f3 0f 1e fa          	endbr64
  1a:	53                   	push   %rbx
  1b:	48 89 f3             	mov    %rsi,%rbx
  1e:	e8 13 4b f0 f6       	call   0xf6f04b36
  23:	48 8d 3d bc 91 02 05 	lea    0x50291bc(%rip),%rdi        # 0x50291e6
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	31 ff                	xor    %edi,%edi
  31:	48 89 de             	mov    %rbx,%rsi
  34:	ba 02 00 00 00       	mov    $0x2,%edx
  39:	e8 f8 14 69 fe       	call   0xfe691536
  3e:	31 c0                	xor    %eax,%eax