------------[ cut here ]------------
Have pending ack frames!
WARNING: CPU: 3 PID: 64 at net/mac80211/main.c:1715 ieee80211_free_ack_frame+0x5a/0x60 net/mac80211/main.c:1715
Modules linked in:
CPU: 3 UID: 0 PID: 64 Comm: kworker/u32:3 Not tainted 6.15.0-rc7-syzkaller-00152-gd0c22de9995b #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: netns cleanup_net
RIP: 0010:ieee80211_free_ack_frame+0x5a/0x60 net/mac80211/main.c:1715
Code: 31 ff e8 59 4b 69 fe 31 c0 5b 5d c3 cc cc cc cc e8 6b 22 e1 f6 c6 05 18 88 93 05 01 90 48 c7 c7 80 cb e3 8c e8 c7 af a0 f6 90 <0f> 0b 90 90 eb c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000b5f958 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff888028f68b40 RCX: ffffffff817ad4f8
RDX: ffff888020b3c880 RSI: ffffffff817ad505 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffffffff8ada2340 R14: 0000000080000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880d6cda000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7f9d8d2ff8 CR3: 00000000247c8000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 idr_for_each+0x140/0x270 lib/idr.c:208
 ieee80211_free_hw+0x9c/0x2d0 net/mac80211/main.c:1732
 mac80211_hwsim_del_radio drivers/net/wireless/virtual/mac80211_hwsim.c:5668 [inline]
 hwsim_exit_net+0x3fd/0x7d0 drivers/net/wireless/virtual/mac80211_hwsim.c:6545
 ops_exit_list+0xb3/0x180 net/core/net_namespace.c:172
 cleanup_net+0x5c1/0xb30 net/core/net_namespace.c:654
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
 kthread+0x3c2/0x780 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>