bond0: (slave wlan1): Releasing backup interface ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5317 at net/mac80211/chan.c:2017 ieee80211_link_release_channel+0x150/0x180 net/mac80211/chan.c:2017 Modules linked in: CPU: 0 PID: 5317 Comm: kworker/u4:20 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 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 ac 84 1d f8 bf 18 1e 00 00 48 03 3b 5b 41 5c 41 5d 41 5e 41 5f 5d e9 a5 e7 80 00 e8 50 78 cc f7 <0f> 0b eb c5 48 c7 c1 24 27 20 8e 80 e1 07 80 c1 03 38 c1 0f 8c 51 RSP: 0018:ffffc900035e76c8 EFLAGS: 00010293 RAX: ffffffff89b5fd00 RBX: ffff8880799c95a8 RCX: ffff88802a415940 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff8e1ff26f R09: 1ffffffff1c3fe4d R10: dffffc0000000000 R11: fffffbfff1c3fe4e R12: ffff8880799caab0 R13: 1ffff1100f3392b5 R14: ffff8880799ca228 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa0dba49aa0 CR3: 00000000554e9000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000002 DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 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:4688 hwsim_exit_net+0x589/0x650 drivers/net/wireless/mac80211_hwsim.c:5475 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