------------[ cut here ]------------
Have pending ack frames!
WARNING: CPU: 0 PID: 36 at net/mac80211/main.c:1715 ieee80211_free_ack_frame+0x4d/0x60 net/mac80211/main.c:1715
Modules linked in:
CPU: 0 UID: 0 PID: 36 Comm: kworker/u8:2 Not tainted 6.15.0-rc6-syzkaller-01215-ga8ae8a0e848e #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: netns cleanup_net
RIP: 0010:ieee80211_free_ack_frame+0x4d/0x60 net/mac80211/main.c:1715
Code: 00 00 e8 26 4b 72 fe 31 c0 5b e9 4e 58 94 00 cc e8 58 42 f9 f6 c6 05 da d2 a2 04 01 90 48 c7 c7 60 31 8c 8c e8 d4 9e bd f6 90 <0f> 0b 90 90 eb c8 cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90
RSP: 0018:ffffc90000ad76b0 EFLAGS: 00010246
RAX: f05ece91f217f500 RBX: ffff88802ce87a00 RCX: ffff888140ef1e00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: ffffc90000ad77b8 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bba944 R12: ffffc90000ad7720
R13: ffff88805b9bcdf0 R14: ffff88802711afa8 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8881260b6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efece5ee5f8 CR3: 0000000030e10000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 idr_for_each+0x1b2/0x290 lib/idr.c:208
 ieee80211_free_hw+0xc6/0x480 net/mac80211/main.c:1732
 mac80211_hwsim_del_radio+0x2de/0x460 drivers/net/wireless/virtual/mac80211_hwsim.c:5674
 hwsim_exit_net+0x584/0x640 drivers/net/wireless/virtual/mac80211_hwsim.c:6551
 ops_exit_list net/core/net_namespace.c:200 [inline]
 ops_undo_list+0x49a/0x990 net/core/net_namespace.c:253
 cleanup_net+0x4c5/0x8a0 net/core/net_namespace.c:686
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xade/0x17a0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x711/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>