------------[ cut here ]------------
Have pending ack frames!
WARNING: CPU: 0 PID: 1095 at net/mac80211/main.c:1527 ieee80211_free_ack_frame+0x58/0x60 net/mac80211/main.c:1527
Modules linked in:
CPU: 0 PID: 1095 Comm: kworker/u16:8 Not tainted 6.8.0-rc3-syzkaller-00005-g99bd3cb0d12e #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: netns cleanup_net
RIP: 0010:ieee80211_free_ack_frame+0x58/0x60 net/mac80211/main.c:1527
Code: 00 00 e8 1b 8a 72 fe 31 c0 5b 5d c3 cc cc cc cc e8 3d 55 5d f7 c6 05 46 28 59 05 01 90 48 c7 c7 60 3e 4e 8c e8 a9 82 21 f7 90 <0f> 0b 90 90 eb c5 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900041ffa00 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff888023716140 RCX: ffffffff814f7499
RDX: ffff888022c78000 RSI: ffffffff814f74a6 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000003 R12: dffffc0000000000
R13: ffffffff8a2df000 R14: 0000000080000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88806b200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f54b1276870 CR3: 0000000019d9a000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 idr_for_each+0x141/0x270 lib/idr.c:208
 ieee80211_free_hw+0xa6/0x2f0 net/mac80211/main.c:1544
 mac80211_hwsim_del_radio drivers/net/wireless/virtual/mac80211_hwsim.c:5438 [inline]
 hwsim_exit_net+0x3fe/0x7d0 drivers/net/wireless/virtual/mac80211_hwsim.c:6312
 ops_exit_list+0xb0/0x180 net/core/net_namespace.c:170
 cleanup_net+0x508/0xb20 net/core/net_namespace.c:618
 process_one_work+0x889/0x15e0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x12a0 kernel/workqueue.c:2787
 kthread+0x2c6/0x3b0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
 </TASK>