------------[ cut here ]------------
Have pending ack frames!
WARNING: CPU: 2 PID: 6178 at net/mac80211/main.c:1703 ieee80211_free_ack_frame+0x5a/0x60 net/mac80211/main.c:1703
Modules linked in:
CPU: 2 UID: 0 PID: 6178 Comm: kworker/u32:7 Not tainted 6.12.0-rc7-syzkaller-00125-gcfaaa7d010d1 #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:1703
Code: 31 ff e8 b9 8c 6c fe 31 c0 5b 5d c3 cc cc cc cc e8 1b 13 04 f7 c6 05 55 c2 be 05 01 90 48 c7 c7 20 cf be 8c e8 87 04 c5 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:ffffc9000354f9b8 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff8880315e6280 RCX: ffffffff814e6e79
RDX: ffff88803030c880 RSI: ffffffff814e6e86 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000
R13: ffffffff8a896800 R14: 0000000080000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88806a800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c372fa8 CR3: 0000000028982000 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+0xa6/0x2f0 net/mac80211/main.c:1720
 mac80211_hwsim_del_radio drivers/net/wireless/virtual/mac80211_hwsim.c:5628 [inline]
 hwsim_exit_net+0x3fe/0x7d0 drivers/net/wireless/virtual/mac80211_hwsim.c:6505
 ops_exit_list+0xb0/0x180 net/core/net_namespace.c:173
 cleanup_net+0x5b7/0xb40 net/core/net_namespace.c:626
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>