------------[ cut here ]------------
Have pending ack frames!
WARNING: CPU: 2 PID: 1140 at net/mac80211/main.c:1713 ieee80211_free_ack_frame+0x5a/0x60 net/mac80211/main.c:1713
Modules linked in:
CPU: 2 UID: 0 PID: 1140 Comm: kworker/u32:6 Not tainted 6.14.0-rc3-syzkaller-00295-g27102b38b8ca #0
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:1713
Code: 31 ff e8 29 01 67 fe 31 c0 5b 5d c3 cc cc cc cc e8 db 98 f3 f6 c6 05 ce a9 84 05 01 90 48 c7 c7 40 af c1 8c e8 67 c9 b3 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:ffffc90005fa7950 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff8880271d9180 RCX: ffffffff817a1229
RDX: ffff88802717a440 RSI: ffffffff817a1236 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000006 R12: dffffc0000000000
R13: ffffffff8ac646d0 R14: 0000000080000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88806a800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f20205f7440 CR3: 00000000325e0000 CR4: 0000000000352ef0
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+0x9b/0x2d0 net/mac80211/main.c:1730
 mac80211_hwsim_del_radio drivers/net/wireless/virtual/mac80211_hwsim.c:5667 [inline]
 hwsim_exit_net+0x3fe/0x7d0 drivers/net/wireless/virtual/mac80211_hwsim.c:6544
 ops_exit_list+0xb0/0x180 net/core/net_namespace.c:172
 cleanup_net+0x5c6/0xb30 net/core/net_namespace.c:652
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3317 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
 kthread+0x3af/0x750 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>