------------[ cut here ]------------
Have pending ack frames!
WARNING: CPU: 1 PID: 11563 at net/mac80211/main.c:1713 ieee80211_free_ack_frame+0x4c/0x60 net/mac80211/main.c:1713
Modules linked in:
CPU: 1 UID: 0 PID: 11563 Comm: kworker/u8:7 Not tainted 6.15.0-rc2-syzkaller-00404-g8560697b23dc #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: netns cleanup_net
RIP: 0010:ieee80211_free_ack_frame+0x4c/0x60 net/mac80211/main.c:1713
Code: 00 00 00 e8 46 d0 4f fe 31 c0 5b c3 cc cc cc cc e8 19 ba 2f f6 c6 05 2d e1 b6 04 01 90 48 c7 c7 60 63 6c 8d e8 35 14 ef f5 90 <0f> 0b 90 90 eb c9 cc cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90
RSP: 0018:ffffc9000b6ff730 EFLAGS: 00010246
RAX: 0725e7c6ca4fc300 RBX: ffff88802837f500 RCX: ffff88802fd35a00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000b6ff838 R08: ffffffff818218d2 R09: 1ffff110170e47d2
R10: dffffc0000000000 R11: ffffed10170e47d3 R12: ffffc9000b6ff7a0
R13: dffffc0000000000 R14: ffff888011c49530 R15: ffff888025e4ac30
FS:  0000000000000000(0000) GS:ffff88812509a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f73d7b34 CR3: 0000000046c9c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 idr_for_each+0x1e4/0x2d0 lib/idr.c:208
 ieee80211_free_hw+0xd0/0x480 net/mac80211/main.c:1730
 mac80211_hwsim_del_radio+0x32d/0x4c0 drivers/net/wireless/virtual/mac80211_hwsim.c:5668
 hwsim_exit_net+0x5c3/0x670 drivers/net/wireless/virtual/mac80211_hwsim.c:6545
 ops_exit_list net/core/net_namespace.c:172 [inline]
 cleanup_net+0x814/0xd60 net/core/net_namespace.c:654
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319
 worker_thread+0x870/0xd50 kernel/workqueue.c:3400
 kthread+0x7b7/0x940 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>