------------[ cut here ]------------
Have pending ack frames!
WARNING: CPU: 0 PID: 49 at net/mac80211/main.c:1527 ieee80211_free_ack_frame+0x4a/0x50 net/mac80211/main.c:1527
Modules linked in:
CPU: 0 PID: 49 Comm: kworker/u4:3 Not tainted 6.8.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Workqueue: netns cleanup_net
RIP: 0010:ieee80211_free_ack_frame+0x4a/0x50 net/mac80211/main.c:1527
Code: 00 00 00 e8 88 d3 63 fe 31 c0 5b e9 30 50 9e 00 e8 7b 0b c0 f6 c6 05 66 bd 9c 04 01 90 48 c7 c7 20 11 bb 8c e8 77 16 84 f6 90 <0f> 0b 90 90 eb cb 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000b9f830 EFLAGS: 00010246
RAX: 0a0e3b52cba14700 RBX: ffff88802f09aa00 RCX: ffff8880157e1dc0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000b9f938 R08: ffffffff81577a92 R09: 1ffff110172851a2
R10: dffffc0000000000 R11: ffffed10172851a3 R12: ffffc90000b9f8a0
R13: dffffc0000000000 R14: ffff88808196150c R15: ffff88808b88d630
FS:  0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001e00 CR3: 000000007e342000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 idr_for_each+0x1e4/0x2d0 lib/idr.c:208
 ieee80211_free_hw+0xd0/0x480 net/mac80211/main.c:1544
 mac80211_hwsim_del_radio+0x329/0x4c0 drivers/net/wireless/virtual/mac80211_hwsim.c:5438
 hwsim_exit_net+0x5c1/0x670 drivers/net/wireless/virtual/mac80211_hwsim.c:6312
 ops_exit_list net/core/net_namespace.c:170 [inline]
 cleanup_net+0x6dc/0xb90 net/core/net_namespace.c:618
 process_one_work kernel/workqueue.c:2633 [inline]
 process_scheduled_works+0x915/0x1420 kernel/workqueue.c:2706
 worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787
 kthread+0x2f1/0x390 kernel/kthread.c:388
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
 </TASK>