------------[ cut here ]------------ Have pending ack frames! WARNING: CPU: 0 PID: 9 at net/mac80211/main.c:1513 ieee80211_free_ack_frame+0x64/0x6c net/mac80211/main.c:1513 Modules linked in: CPU: 0 PID: 9 Comm: kworker/u4:0 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Workqueue: netns cleanup_net pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : ieee80211_free_ack_frame+0x64/0x6c net/mac80211/main.c:1513 lr : ieee80211_free_ack_frame+0x64/0x6c net/mac80211/main.c:1513 sp : ffff80001c867760 x29: ffff80001c867760 x28: 0000000000000000 x27: ffff80001c8677a0 x26: dfff800000000000 x25: dfff800000000000 x24: ffff0000cf3d8000 x23: 0000000000000001 x22: ffff0000e2ad79f0 x21: ffff0000d9c7b288 x20: ffff800017a8b000 x19: ffff0000f58d7780 x18: ffff800011abbcc0 x17: 1fffe00033ed797e x16: ffff8000082d25b8 x15: 0000000040000000 x14: 0000000000000002 x13: 1ffff00002a180b1 x12: 0000000000ff0100 x11: ff0080000a893e94 x10: 0000000000000003 x9 : fe5379574d807f00 x8 : fe5379574d807f00 x7 : ffff800008251e80 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000007 x1 : ffff800011abd7c0 x0 : ffff80018a6a7000 Call trace: ieee80211_free_ack_frame+0x64/0x6c net/mac80211/main.c:1513 idr_for_each+0x17c/0x248 lib/idr.c:208 ieee80211_free_hw+0xc4/0x40c net/mac80211/main.c:1531 mac80211_hwsim_del_radio+0x260/0x3a8 drivers/net/wireless/mac80211_hwsim.c:4691 hwsim_exit_net+0x49c/0x558 drivers/net/wireless/mac80211_hwsim.c:5475 ops_exit_list net/core/net_namespace.c:172 [inline] cleanup_net+0x5c4/0xa74 net/core/net_namespace.c:640 process_one_work+0x7f4/0x13a8 kernel/workqueue.c:2292 worker_thread+0x8c8/0xfbc kernel/workqueue.c:2439 kthread+0x250/0x2d8 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850 irq event stamp: 3671920 hardirqs last enabled at (3671919): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline] hardirqs last enabled at (3671919): [] finish_lock_switch+0xb0/0x1c4 kernel/sched/core.c:5003 hardirqs last disabled at (3671920): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (3669448): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (3669448): [] netif_addr_unlock_bh include/linux/netdevice.h:4510 [inline] softirqs last enabled at (3669448): [] dev_mc_flush+0x1b0/0x1f4 net/core/dev_addr_lists.c:1036 softirqs last disabled at (3669446): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- device hsr_slave_0 left promiscuous mode device hsr_slave_1 left promiscuous mode batman_adv: batadv0: Interface deactivated: batadv_slave_0 batman_adv: batadv0: Removing interface: batadv_slave_0 batman_adv: batadv0: Interface deactivated: batadv_slave_1 batman_adv: batadv0: Removing interface: batadv_slave_1 device bridge_slave_1 left promiscuous mode bridge0: port 2(bridge_slave_1) entered disabled state device bridge_slave_0 left promiscuous mode bridge0: port 1(bridge_slave_0) entered disabled state device veth1_macvtap left promiscuous mode device veth0_macvtap left promiscuous mode device veth1_vlan left promiscuous mode device veth0_vlan left promiscuous mode team0 (unregistering): Port device team_slave_1 removed team0 (unregistering): Port device team_slave_0 removed bond0 (unregistering): (slave bond_slave_1): Releasing backup interface bond0 (unregistering): (slave bond_slave_0): Releasing backup interface bond0 (unregistering): Released all slaves