BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! turning off the locking correctness validator. CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.6.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x188/0x20d lib/dump_stack.c:118 add_chain_cache kernel/locking/lockdep.c:2840 [inline] lookup_chain_cache_add kernel/locking/lockdep.c:2914 [inline] validate_chain kernel/locking/lockdep.c:2935 [inline] __lock_acquire.cold+0x263/0x288 kernel/locking/lockdep.c:3954 lock_acquire+0x197/0x420 kernel/locking/lockdep.c:4484 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xbf kernel/locking/spinlock.c:159 debug_object_activate+0x131/0x470 lib/debugobjects.c:636 debug_rcu_head_queue kernel/rcu/rcu.h:176 [inline] kfree_call_rcu+0x107/0x400 kernel/rcu/tree.c:2858 __hw_addr_del_entry net/core/dev_addr_lists.c:107 [inline] __hw_addr_del_entry+0x2dd/0x3b0 net/core/dev_addr_lists.c:88 __hw_addr_del_ex+0x129/0x150 net/core/dev_addr_lists.c:121 __hw_addr_unsync_one+0x58/0xe0 net/core/dev_addr_lists.c:159 __hw_addr_unsync+0xdd/0x120 net/core/dev_addr_lists.c:219 ieee80211_do_stop+0x3f5/0x1fc0 net/mac80211/iface.c:872 ieee80211_stop+0x1a/0x20 net/mac80211/iface.c:1076 __dev_close_many+0x1b3/0x2e0 net/core/dev.c:1520 dev_close_many+0x226/0x620 net/core/dev.c:1545 dev_close.part.0+0xfd/0x1c0 net/core/dev.c:1571 dev_close+0x58/0x70 net/core/dev.c:1574 cfg80211_shutdown_all_interfaces+0x12d/0x1d0 net/wireless/core.c:271 ieee80211_remove_interfaces+0xdc/0x780 net/mac80211/iface.c:2018 ieee80211_unregister_hw+0x47/0x220 net/mac80211/main.c:1354 mac80211_hwsim_del_radio+0x25a/0x380 drivers/net/wireless/mac80211_hwsim.c:3218 hwsim_exit_net+0x505/0xb8d drivers/net/wireless/mac80211_hwsim.c:3973 ops_exit_list.isra.0+0xa8/0x150 net/core/net_namespace.c:186 cleanup_net+0x511/0xa50 net/core/net_namespace.c:603 process_one_work+0x94b/0x1690 kernel/workqueue.c:2266 worker_thread+0x96/0xe20 kernel/workqueue.c:2412 kthread+0x357/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 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 bridge0: port 2(bridge_slave_1) entered disabled state bridge0: port 1(bridge_slave_0) entered disabled state device veth1_vlan left promiscuous mode device hsr_slave_1 left promiscuous mode @þÿ (unregistering): Port device team_slave_1 removed @þÿ (unregistering): Port device team_slave_0 removed bond0 (unregistering): (slave bond_slave_1): Releasing backup interface device bond_slave_1 left promiscuous mode bond0 (unregistering): (slave bond_slave_0): Releasing backup interface device bond_slave_0 left promiscuous mode bond0 (unregistering): Released all slaves