IPVS: stopping master sync thread 23545 ...
------------[ cut here ]------------
Have pending ack frames!
WARNING: CPU: 1 PID: 9245 at net/mac80211/main.c:1527 ieee80211_free_ack_frame+0x4a/0x50 net/mac80211/main.c:1527
Modules linked in:
CPU: 1 PID: 9245 Comm: kworker/u4:16 Not tainted 6.8.0-rc5-syzkaller-00129-g2a770cdc4382 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Workqueue: netns cleanup_net
RIP: 0010:ieee80211_free_ack_frame+0x4a/0x50 net/mac80211/main.c:1527
Code: 00 00 00 e8 d8 c8 63 fe 31 c0 5b c3 cc cc cc cc e8 fb fd bf f6 c6 05 c6 b0 9c 04 01 90 48 c7 c7 e0 14 bb 8c e8 b7 08 84 f6 90 <0f> 0b 90 90 eb cb 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900053cf830 EFLAGS: 00010246
RAX: 43b28df6106b6100 RBX: ffff88801de37500 RCX: ffff88807f871dc0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900053cf938 R08: ffffffff81577ab2 R09: 1ffff92000a79e58
R10: dffffc0000000000 R11: fffff52000a79e59 R12: ffffc900053cf8a0
R13: dffffc0000000000 R14: ffff88802531950c R15: ffff888034cb98f0
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6d4db06d58 CR3: 000000002de62000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 idr_for_each+0x1e2/0x2d0 lib/idr.c:208
 ieee80211_free_hw+0xd0/0x480 net/mac80211/main.c:1544
 mac80211_hwsim_del_radio+0x329/0x4c0 drivers/net/wireless/virtual/mac80211_hwsim.c:5438
 hwsim_exit_net+0x5c1/0x670 drivers/net/wireless/virtual/mac80211_hwsim.c:6312
 ops_exit_list net/core/net_namespace.c:170 [inline]
 cleanup_net+0x6da/0xb90 net/core/net_namespace.c:618
 process_one_work kernel/workqueue.c:2633 [inline]
 process_scheduled_works+0x913/0x1420 kernel/workqueue.c:2706
 worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787
 kthread+0x2ef/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
 </TASK>