------------[ cut here ]------------ Have pending ack frames! WARNING: CPU: 1 PID: 441 at net/mac80211/main.c:1427 ieee80211_free_ack_frame+0x64/0x6c net/mac80211/main.c:1427 Modules linked in: CPU: 1 PID: 441 Comm: kworker/u4:5 Not tainted 5.15.189-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: netns cleanup_net pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : ieee80211_free_ack_frame+0x64/0x6c net/mac80211/main.c:1427 lr : ieee80211_free_ack_frame+0x64/0x6c net/mac80211/main.c:1427 sp : ffff80001f797740 x29: ffff80001f797740 x28: 0000000000000000 x27: ffff80001f797780 x26: dfff800000000000 x25: dfff800000000000 x24: ffff0000da694000 x23: 0000000000000001 x22: ffff0000cfc34b30 x21: ffff0000dc973258 x20: ffff8000165b2000 x19: ffff0000cca8e8c0 x18: 0000000000000001 x17: 0000000000000000 x16: ffff8000111bc798 x15: 00000000ffffffff x14: 0000000000ff0100 x13: 0000000000000001 x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : 43a55769f4053800 x8 : 43a55769f4053800 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff80001f797038 x4 : ffff80001424f400 x3 : ffff80000850433c x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000018 Call trace: ieee80211_free_ack_frame+0x64/0x6c net/mac80211/main.c:1427 idr_for_each+0x17c/0x248 lib/idr.c:208 ieee80211_free_hw+0xc4/0x398 net/mac80211/main.c:1445 mac80211_hwsim_del_radio+0x260/0x3a8 drivers/net/wireless/mac80211_hwsim.c:3476 hwsim_exit_net+0x49c/0x558 drivers/net/wireless/mac80211_hwsim.c:4243 ops_exit_list net/core/net_namespace.c:172 [inline] cleanup_net+0x5c4/0xa98 net/core/net_namespace.c:635 process_one_work+0x79c/0x1140 kernel/workqueue.c:2310 worker_thread+0x8f4/0x101c kernel/workqueue.c:2457 kthread+0x374/0x454 kernel/kthread.c:334 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:855 irq event stamp: 1858346 hardirqs last enabled at (1858345): [] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:257 hardirqs last disabled at (1858346): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (1855982): [] spin_unlock_bh include/linux/spinlock.h:408 [inline] softirqs last enabled at (1855982): [] netif_addr_unlock_bh include/linux/netdevice.h:4625 [inline] softirqs last enabled at (1855982): [] dev_mc_flush+0x1b0/0x1f4 net/core/dev_addr_lists.c:1001 softirqs last disabled at (1855980): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:18 ---[ end trace 7b8737c8d1e2714b ]--- 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 netdevsim netdevsim1 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim1 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim1 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim1 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 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