------------[ cut here ]------------
Have pending ack frames!
WARNING: CPU: 0 PID: 2928 at net/mac80211/main.c:1701 ieee80211_free_ack_frame+0x4d/0x60 net/mac80211/main.c:1701
Modules linked in:
CPU: 0 UID: 0 PID: 2928 Comm: kworker/u8:8 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: netns cleanup_net
RIP: 0010:ieee80211_free_ack_frame+0x4d/0x60 net/mac80211/main.c:1701
Code: 00 00 e8 76 da 73 fe 31 c0 5b c3 cc cc cc cc cc e8 08 4d d8 f6 c6 05 91 31 a6 04 01 90 48 c7 c7 a0 2c b0 8c e8 54 e8 9b 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:ffffc9000bc27610 EFLAGS: 00010246
RAX: c3f82c5dc177a400 RBX: ffff888073c78140 RCX: ffff88802e835a00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: ffffc9000bc27718 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfa22c R12: ffffc9000bc27680
R13: ffff88802556f470 R14: ffff88803293afa0 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff888125c15000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff211fd180 CR3: 00000000743e6000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 idr_for_each+0x1b5/0x290 lib/idr.c:208
 ieee80211_free_hw+0x44/0x3d0 net/mac80211/main.c:1713
 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+0x49a/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+0x436/0x7d0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>