BUG: MAX_LOCKDEP_CHAINS too low! turning off the locking correctness validator. CPU: 0 PID: 4798 Comm: kworker/u4:8 Not tainted 6.1.118-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: netns cleanup_net Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 dump_stack+0x1c/0x5c lib/dump_stack.c:113 lookup_chain_cache_add kernel/locking/lockdep.c:3772 [inline] validate_chain kernel/locking/lockdep.c:3793 [inline] __lock_acquire+0x1b88/0x7680 kernel/locking/lockdep.c:5049 lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5662 local_lock_acquire+0x3c/0x98 include/linux/local_lock_internal.h:29 ___slab_alloc+0x1c8/0xee0 mm/slub.c:3099 __slab_alloc mm/slub.c:3279 [inline] slab_alloc_node mm/slub.c:3364 [inline] __kmem_cache_alloc_node+0x2c8/0x388 mm/slub.c:3437 kmalloc_trace+0x48/0x94 mm/slab_common.c:1026 kmalloc include/linux/slab.h:557 [inline] kzalloc include/linux/slab.h:693 [inline] nsim_fib_event_schedule_work drivers/net/netdevsim/fib.c:990 [inline] nsim_fib_event_nb+0x114/0xe28 drivers/net/netdevsim/fib.c:1043 notifier_call_chain kernel/notifier.c:87 [inline] atomic_notifier_call_chain+0x174/0x2a0 kernel/notifier.c:225 call_fib_notifiers+0x44/0x78 net/core/fib_notifier.c:35 call_fib6_notifiers+0x60/0x80 net/ipv6/fib6_notifier.c:22 fib6_del+0xd48/0x1220 net/ipv6/ip6_fib.c:2032 fib6_clean_node+0x24c/0x4d0 net/ipv6/ip6_fib.c:2194 fib6_walk_continue+0x5b8/0x7e0 net/ipv6/ip6_fib.c:2116 fib6_walk+0x144/0x258 net/ipv6/ip6_fib.c:2164 fib6_clean_tree net/ipv6/ip6_fib.c:2244 [inline] __fib6_clean_all+0x29c/0x418 net/ipv6/ip6_fib.c:2260 fib6_clean_all+0x3c/0x50 net/ipv6/ip6_fib.c:2271 rt6_sync_down_dev net/ipv6/route.c:4902 [inline] rt6_disable_ip+0x134/0x81c net/ipv6/route.c:4907 addrconf_ifdown+0x150/0x17a8 net/ipv6/addrconf.c:3782 addrconf_notify+0x324/0xc94 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xd4/0x164 kernel/notifier.c:455 call_netdevice_notifiers_info net/core/dev.c:1970 [inline] call_netdevice_notifiers_extack net/core/dev.c:2008 [inline] call_netdevice_notifiers net/core/dev.c:2022 [inline] dev_close_many+0x2fc/0x468 net/core/dev.c:1570 unregister_netdevice_many+0x3fc/0x175c net/core/dev.c:10864 unregister_netdevice_queue+0x2d0/0x31c net/core/dev.c:10821 unregister_netdevice include/linux/netdevice.h:3045 [inline] nsim_destroy+0x58/0x164 drivers/net/netdevsim/netdev.c:382 __nsim_dev_port_del+0x148/0x1a8 drivers/net/netdevsim/dev.c:1433 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1445 [inline] nsim_dev_reload_destroy+0x240/0x43c drivers/net/netdevsim/dev.c:1662 nsim_dev_reload_down+0xac/0xe8 drivers/net/netdevsim/dev.c:968 devlink_reload+0x1ac/0x578 net/devlink/leftover.c:4472 devlink_pernet_pre_exit+0x138/0x318 net/devlink/leftover.c:12501 ops_pre_exit_list net/core/net_namespace.c:162 [inline] cleanup_net+0x488/0x994 net/core/net_namespace.c:592 process_one_work+0x7ac/0x1404 kernel/workqueue.c:2292 worker_thread+0x8e4/0xfec kernel/workqueue.c:2439 kthread+0x250/0x2d8 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864 netdevsim netdevsim5 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 netdevsim netdevsim5 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0