------------[ cut here ]------------
Have pending ack frames!
WARNING: CPU: 1 PID: 6926 at net/mac80211/main.c:1696 ieee80211_free_ack_frame+0x4d/0x60 net/mac80211/main.c:1696
Modules linked in:
CPU: 1 UID: 0 PID: 6926 Comm: kworker/u8:9 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: netns cleanup_net
RIP: 0010:ieee80211_free_ack_frame+0x4d/0x60 net/mac80211/main.c:1696
Code: 00 00 e8 96 e4 73 fe 31 c0 5b c3 cc cc cc cc cc e8 f8 b9 d8 f6 c6 05 b5 92 a6 04 01 90 48 c7 c7 a0 15 b0 8c e8 94 58 9c 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:ffffc90003f8f610 EFLAGS: 00010246
RAX: 05ac758bdd4ce000 RBX: ffff8880312de640 RCX: ffff888025dd0000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: ffffc90003f8f718 R08: ffff8880b8724253 R09: 1ffff110170e484a
R10: dffffc0000000000 R11: ffffed10170e484b R12: ffffc90003f8f680
R13: ffff888070fe9370 R14: ffff8880338f2fa0 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff888125d1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f7f855c0 CR3: 0000000061da0000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000000e DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 idr_for_each+0x1b5/0x290 lib/idr.c:208
 ieee80211_free_hw+0x44/0x3d0 net/mac80211/main.c:1708
 mac80211_hwsim_del_radio+0x2de/0x460 drivers/net/wireless/virtual/mac80211_hwsim.c:5677
 hwsim_exit_net+0x584/0x640 drivers/net/wireless/virtual/mac80211_hwsim.c:6554
 ops_exit_list net/core/net_namespace.c:198 [inline]
 ops_undo_list+0x497/0x990 net/core/net_namespace.c:251
 cleanup_net+0x4c5/0x800 net/core/net_namespace.c:682
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>