bond0: (slave wlan1): Releasing backup interface ------------[ cut here ]------------ WARNING: CPU: 0 PID: 4433 at net/mac80211/chan.c:2017 ieee80211_link_release_channel+0x150/0x180 net/mac80211/chan.c:2017 Modules linked in: CPU: 0 PID: 4433 Comm: kworker/u4:18 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Workqueue: netns cleanup_net RIP: 0010:ieee80211_link_release_channel+0x150/0x180 net/mac80211/chan.c:2017 Code: 7c 2d 00 00 74 08 48 89 df e8 ec 42 1c f8 bf 18 1e 00 00 48 03 3b 5b 41 5c 41 5d 41 5e 41 5f 5d e9 f5 04 81 00 e8 20 3b cb f7 <0f> 0b eb c5 48 c7 c1 a4 5e 20 8e 80 e1 07 80 c1 03 38 c1 0f 8c 51 RSP: 0018:ffffc90004c5f6c8 EFLAGS: 00010293 RAX: ffffffff89b74080 RBX: ffff88807e6a55a8 RCX: ffff88802568bc00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff8e2029ef R09: 1ffffffff1c4053d R10: dffffc0000000000 R11: fffffbfff1c4053e R12: ffff88807e6a6ab0 R13: 1ffff1100fcd4ab5 R14: ffff88807e6a6228 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f203684f156 CR3: 000000005c18a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unregister_netdevice_many_notify+0x13d6/0x19c0 net/core/dev.c:11041 ieee80211_remove_interfaces+0x453/0x710 net/mac80211/iface.c:2390 ieee80211_unregister_hw+0x59/0x290 net/mac80211/main.c:1483 mac80211_hwsim_del_radio+0x285/0x480 drivers/net/wireless/mac80211_hwsim.c:4687 hwsim_exit_net+0x589/0x650 drivers/net/wireless/mac80211_hwsim.c:5474 ops_exit_list net/core/net_namespace.c:172 [inline] cleanup_net+0x706/0xba0 net/core/net_namespace.c:640 process_one_work+0x8a2/0x1160 kernel/workqueue.c:2292 worker_thread+0xaa2/0x1270 kernel/workqueue.c:2439 kthread+0x29d/0x330 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295