BUG: MAX_LOCKDEP_CHAINS too low! turning off the locking correctness validator. CPU: 1 UID: 0 PID: 9615 Comm: syz-executor Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 add_chain_cache kernel/locking/lockdep.c:-1 [inline] lookup_chain_cache_add kernel/locking/lockdep.c:3855 [inline] validate_chain kernel/locking/lockdep.c:3876 [inline] __lock_acquire+0xf9c/0x30a4 kernel/locking/lockdep.c:5237 lock_acquire+0x140/0x2e0 kernel/locking/lockdep.c:5868 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x48/0x60 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] inode_sb_list_del fs/inode.c:668 [inline] evict+0x164/0xa74 fs/inode.c:822 iput_final fs/inode.c:1951 [inline] iput+0xc54/0xfdc fs/inode.c:2003 proc_invalidate_siblings_dcache+0x3f4/0x65c fs/proc/inode.c:152 proc_sys_invalidate_dcache fs/proc/proc_sysctl.c:289 [inline] start_unregistering fs/proc/proc_sysctl.c:316 [inline] drop_sysctl_table+0x1b0/0x484 fs/proc/proc_sysctl.c:1517 unregister_sysctl_table+0x48/0x68 fs/proc/proc_sysctl.c:1542 unregister_net_sysctl_table+0x20/0x30 net/sysctl_net.c:177 __devinet_sysctl_unregister net/ipv4/devinet.c:2700 [inline] devinet_sysctl_unregister net/ipv4/devinet.c:2728 [inline] inetdev_destroy net/ipv4/devinet.c:334 [inline] inetdev_event+0x690/0x1404 net/ipv4/devinet.c:1655 notifier_call_chain+0x190/0x4cc kernel/notifier.c:85 raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453 call_netdevice_notifiers_info net/core/dev.c:2230 [inline] call_netdevice_notifiers_extack net/core/dev.c:2268 [inline] call_netdevice_notifiers net/core/dev.c:2282 [inline] unregister_netdevice_many_notify+0x14bc/0x2110 net/core/dev.c:12383 unregister_netdevice_many net/core/dev.c:12446 [inline] unregister_netdevice_queue+0x26c/0x2fc net/core/dev.c:12260 unregister_netdevice include/linux/netdevice.h:3405 [inline] nsim_destroy+0x1c8/0x600 drivers/net/netdevsim/netdev.c:1180 __nsim_dev_port_del+0x13c/0x19c drivers/net/netdevsim/dev.c:1528 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1540 [inline] nsim_dev_reload_destroy+0x240/0x43c drivers/net/netdevsim/dev.c:1763 nsim_drv_remove+0x5c/0x154 drivers/net/netdevsim/dev.c:1778 nsim_bus_remove+0x20/0x30 drivers/net/netdevsim/bus.c:419 device_remove drivers/base/dd.c:569 [inline] __device_release_driver drivers/base/dd.c:1282 [inline] device_release_driver_internal+0x3a8/0x68c drivers/base/dd.c:1305 device_release_driver+0x28/0x38 drivers/base/dd.c:1328 bus_remove_device+0x310/0x3d8 drivers/base/bus.c:616 device_del+0x47c/0x808 drivers/base/core.c:3878 device_unregister+0x2c/0xf4 drivers/base/core.c:3919 nsim_bus_dev_del drivers/net/netdevsim/bus.c:483 [inline] del_device_store+0x27c/0x31c drivers/net/netdevsim/bus.c:244 bus_attr_store+0x80/0xa4 drivers/base/bus.c:172 sysfs_kf_write+0x1a8/0x23c fs/sysfs/file.c:142 kernfs_fop_write_iter+0x33c/0x4d0 fs/kernfs/file.c:352 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x540/0xa3c fs/read_write.c:686 ksys_write+0x120/0x210 fs/read_write.c:738 __do_sys_write fs/read_write.c:749 [inline] __se_sys_write fs/read_write.c:746 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:746 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596