BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! turning off the locking correctness validator. CPU: 1 PID: 16893 Comm: kworker/u4:17 Not tainted 5.17.0-rc2-next-20220203-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:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 add_chain_cache kernel/locking/lockdep.c:3667 [inline] lookup_chain_cache_add kernel/locking/lockdep.c:3748 [inline] validate_chain kernel/locking/lockdep.c:3769 [inline] __lock_acquire.cold+0x3a6/0x3ab kernel/locking/lockdep.c:5027 lock_acquire kernel/locking/lockdep.c:5639 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5604 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162 __debug_check_no_obj_freed lib/debugobjects.c:980 [inline] debug_check_no_obj_freed+0xc7/0x420 lib/debugobjects.c:1023 slab_free_hook mm/slub.c:1703 [inline] slab_free_freelist_hook+0xeb/0x1c0 mm/slub.c:1754 slab_free mm/slub.c:3509 [inline] kfree+0xce/0x2d0 mm/slub.c:4562 skb_free_head net/core/skbuff.c:655 [inline] skb_release_data+0x718/0x870 net/core/skbuff.c:677 skb_release_all net/core/skbuff.c:742 [inline] __kfree_skb net/core/skbuff.c:756 [inline] consume_skb net/core/skbuff.c:914 [inline] consume_skb+0xc2/0x160 net/core/skbuff.c:908 netlink_broadcast+0x355/0xd50 net/netlink/af_netlink.c:1516 uevent_net_broadcast_tagged lib/kobject_uevent.c:372 [inline] kobject_uevent_net_broadcast lib/kobject_uevent.c:412 [inline] kobject_uevent_env+0x120b/0x1660 lib/kobject_uevent.c:593 device_add+0xbb4/0x1ee0 drivers/base/core.c:3386 netdev_register_kobject+0x181/0x430 net/core/net-sysfs.c:2008 register_netdevice+0xd31/0x1510 net/core/dev.c:9667 nsim_init_netdevsim drivers/net/netdevsim/netdev.c:317 [inline] nsim_create+0x3c3/0x520 drivers/net/netdevsim/netdev.c:365 __nsim_dev_port_add+0x2bb/0x7c0 drivers/net/netdevsim/dev.c:1392 nsim_dev_port_add_all+0x53/0x150 drivers/net/netdevsim/dev.c:1452 nsim_dev_reload_create drivers/net/netdevsim/dev.c:1501 [inline] nsim_dev_reload_up+0x568/0x790 drivers/net/netdevsim/dev.c:991 devlink_reload+0x2aa/0x6b0 net/core/devlink.c:4079 devlink_pernet_pre_exit+0x17e/0x220 net/core/devlink.c:11424 ops_pre_exit_list net/core/net_namespace.c:158 [inline] cleanup_net+0x451/0xb00 net/core/net_namespace.c:588 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 device hsr_slave_0 left promiscuous mode device hsr_slave_1 left promiscuous mode bond0 (unregistering): Released all slaves