------------[ cut here ]------------
Have pending ack frames!
WARNING: CPU: 1 PID: 10719 at net/mac80211/main.c:1416 ieee80211_free_ack_frame+0x4a/0x50 net/mac80211/main.c:1416
Modules linked in:
CPU: 1 PID: 10719 Comm: kworker/u4:7 Not tainted 5.16.0-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+0x4a/0x50 net/mac80211/main.c:1416
Code: af e5 f8 48 89 ef 31 f6 e8 83 19 95 fe 31 c0 5b 5d c3 e8 e9 af e5 f8 48 c7 c7 e0 d8 cd 8a c6 05 31 32 ec 04 01 e8 43 37 73 00 <0f> 0b eb d0 66 90 41 57 41 56 49 89 f6 41 55 41 54 49 89 d4 55 48
RSP: 0018:ffffc9001049f9d8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88801ac30000 RSI: ffffffff815eea08 RDI: fffff52002093f2d
RBP: ffff88807901a000 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815e87ae R11: 0000000000000000 R12: dffffc0000000000
R13: ffffffff8891c6d0 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e946dffc10 CR3: 0000000051f87000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 idr_for_each+0x113/0x220 lib/idr.c:208
 ieee80211_free_hw+0x9b/0x2b0 net/mac80211/main.c:1432
 mac80211_hwsim_del_radio drivers/net/wireless/mac80211_hwsim.c:3586 [inline]
 hwsim_exit_net+0x55f/0xca0 drivers/net/wireless/mac80211_hwsim.c:4346
 ops_exit_list+0xb0/0x170 net/core/net_namespace.c:168
 cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:597
 process_one_work+0x9b2/0x1660 kernel/workqueue.c:2298
 worker_thread+0x65d/0x1130 kernel/workqueue.c:2445
 kthread+0x405/0x4f0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>