------------[ cut here ]------------
Have pending ack frames!
WARNING: CPU: 1 PID: 586 at net/mac80211/main.c:1419 ieee80211_free_ack_frame+0x48/0x50 net/mac80211/main.c:1419
Modules linked in:
CPU: 1 PID: 586 Comm: kworker/u4:4 Not tainted 5.15.0-rc3-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+0x48/0x50 net/mac80211/main.c:1419
Code: e8 0d 3a f5 f8 48 89 ef e8 f5 17 98 fe 31 c0 5b 5d c3 e8 fb 39 f5 f8 48 c7 c7 e0 29 ab 8a c6 05 d0 16 d9 04 01 e8 25 b0 71 00 <0f> 0b eb d2 0f 1f 40 00 41 57 41 56 49 89 f6 41 55 41 54 49 89 d4
RSP: 0018:ffffc900035ff9d8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff8880196bd580 RSI: ffffffff815dadd8 RDI: fffff520006bff2d
RBP: ffff888023b52a00 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815d4b7e R11: 0000000000000000 R12: dffffc0000000000
R13: ffffffff8880c140 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff059cbc740 CR3: 0000000072427000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 idr_for_each+0x113/0x220 lib/idr.c:208
 ieee80211_free_hw+0x9b/0x2b0 net/mac80211/main.c:1435
 mac80211_hwsim_del_radio drivers/net/wireless/mac80211_hwsim.c:3460 [inline]
 hwsim_exit_net+0x55f/0xca0 drivers/net/wireless/mac80211_hwsim.c:4217
 ops_exit_list+0xb0/0x160 net/core/net_namespace.c:168
 cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:591
 process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295