------------[ cut here ]------------
Have pending ack frames!
WARNING: CPU: 0 PID: 10 at net/mac80211/main.c:1419 ieee80211_free_ack_frame+0x3d/0x50 net/mac80211/main.c:1419
Modules linked in:
CPU: 0 PID: 10 Comm: kworker/u4:1 Not tainted 5.16.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
RIP: 0010:ieee80211_free_ack_frame+0x3d/0x50 net/mac80211/main.c:1419
Code: 39 73 f3 f7 48 89 df e8 11 65 81 fe 31 c0 5b c3 e8 28 73 f3 f7 c6 05 4c 5a 5a 04 01 48 c7 c7 80 e5 bb 8b 31 c0 e8 b3 55 bd f7 <0f> 0b eb d6 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 41 57
RSP: 0000:ffffc90000cf7890 EFLAGS: 00010246
RAX: c4f8e085afffb400 RBX: ffff88807e79a3c0 RCX: ffff888012019d00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90000cf79a0 R08: ffffffff816a1042 R09: ffffed1017344f2c
R10: ffffed1017344f2c R11: 0000000000000000 R12: dffffc0000000000
R13: ffffc90000cf7900 R14: dffffc0000000000 R15: ffff8880376758f0
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c01d1e3fb8 CR3: 0000000072d4a000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 idr_for_each+0x17b/0x2d0 lib/idr.c:208
 ieee80211_free_hw+0xc1/0x450 net/mac80211/main.c:1435
 mac80211_hwsim_del_radio+0x31c/0x490 drivers/net/wireless/mac80211_hwsim.c:3586
 hwsim_exit_net+0x5d3/0x680 drivers/net/wireless/mac80211_hwsim.c:4346
 ops_exit_list net/core/net_namespace.c:168 [inline]
 cleanup_net+0x758/0xc50 net/core/net_namespace.c:593
 process_one_work+0x853/0x1140 kernel/workqueue.c:2298
 worker_thread+0xac1/0x1320 kernel/workqueue.c:2445
 kthread+0x468/0x490 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30
 </TASK>