------------[ cut here ]------------ Have pending ack frames! WARNING: CPU: 1 PID: 1063 at net/mac80211/main.c:1509 ieee80211_free_ack_frame+0x51/0x60 net/mac80211/main.c:1509 Modules linked in: CPU: 1 PID: 1063 Comm: kworker/u4:5 Not tainted 6.3.0-rc3-syzkaller-00767-gbc77f7318da8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Workqueue: netns cleanup_net RIP: 0010:ieee80211_free_ack_frame+0x51/0x60 net/mac80211/main.c:1509 Code: 48 89 ef be 02 00 00 00 e8 ec d9 87 fe 31 c0 5b 5d c3 e8 92 a5 08 f8 48 c7 c7 60 0a 7d 8b c6 05 9d 54 e8 04 01 e8 2f 1f d1 f7 <0f> 0b eb cd 66 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 41 57 41 RSP: 0018:ffffc90004c4f9d8 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88801eefba80 RSI: ffffffff814b6037 RDI: 0000000000000001 RBP: ffff888071ef1140 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000 R13: ffffffff897a3f30 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555560dc5d0 CR3: 0000000026bd2000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: idr_for_each+0x117/0x230 lib/idr.c:208 ieee80211_free_hw+0xa1/0x2f0 net/mac80211/main.c:1527 mac80211_hwsim_del_radio drivers/net/wireless/mac80211_hwsim.c:4691 [inline] hwsim_exit_net+0x463/0x840 drivers/net/wireless/mac80211_hwsim.c:5474 ops_exit_list+0xb0/0x170 net/core/net_namespace.c:169 cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:613 process_one_work+0x991/0x15c0 kernel/workqueue.c:2390 worker_thread+0x669/0x1090 kernel/workqueue.c:2537 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308