BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! turning off the locking correctness validator. CPU: 0 UID: 0 PID: 8568 Comm: syz-executor Not tainted 6.16.0-rc7-syzkaller-g82af5ea7c611 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 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:3858 [inline] validate_chain kernel/locking/lockdep.c:3879 [inline] __lock_acquire+0xf9c/0x30a4 kernel/locking/lockdep.c:5240 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5871 _raw_spin_lock_nested+0x50/0x6c kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested kernel/sched/core.c:606 [inline] raw_spin_rq_lock kernel/sched/sched.h:1532 [inline] rq_lock kernel/sched/sched.h:1856 [inline] ttwu_queue kernel/sched/core.c:4013 [inline] try_to_wake_up+0x434/0xdf0 kernel/sched/core.c:4343 wake_up_process+0x18/0x24 kernel/sched/core.c:4476 kick_pool+0x3e0/0x58c kernel/workqueue.c:1279 __queue_work+0xde4/0x1230 kernel/workqueue.c:2342 queue_work_on+0xdc/0x18c kernel/workqueue.c:2392 queue_work include/linux/workqueue.h:662 [inline] schedule_work include/linux/workqueue.h:723 [inline] nsim_fib_event_schedule_work drivers/net/netdevsim/fib.c:-1 [inline] nsim_fib_event_nb+0xa9c/0xdc8 drivers/net/netdevsim/fib.c:1043 call_fib_notifier+0x54/0x84 net/core/fib_notifier.c:24 call_fib4_notifier+0x50/0x80 net/ipv4/fib_notifier.c:16 call_fib_entry_notifier net/ipv4/fib_trie.c:90 [inline] fib_leaf_notify net/ipv4/fib_trie.c:2175 [inline] fib_table_notify net/ipv4/fib_trie.c:2193 [inline] fib_notify+0x274/0x48c net/ipv4/fib_trie.c:2216 fib4_dump+0x64/0x80 net/ipv4/fib_notifier.c:45 fib_net_dump net/core/fib_notifier.c:69 [inline] register_fib_notifier+0x168/0x348 net/core/fib_notifier.c:107 nsim_fib_create+0x7b4/0x910 drivers/net/netdevsim/fib.c:1596 nsim_drv_probe+0x684/0x958 drivers/net/netdevsim/dev.c:1585 nsim_bus_probe+0x20/0x30 drivers/net/netdevsim/bus.c:391 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x394/0x910 drivers/base/dd.c:657 __driver_probe_device+0x180/0x2d4 drivers/base/dd.c:799 driver_probe_device+0x78/0x330 drivers/base/dd.c:829 __device_attach_driver+0x290/0x4e0 drivers/base/dd.c:957 bus_for_each_drv+0x220/0x2b4 drivers/base/bus.c:462 __device_attach+0x26c/0x388 drivers/base/dd.c:1029 device_initial_probe+0x24/0x34 drivers/base/dd.c:1078 bus_probe_device+0x178/0x240 drivers/base/bus.c:537 device_add+0x71c/0xa60 drivers/base/core.c:3692 device_register+0x28/0x38 drivers/base/core.c:3774 nsim_bus_dev_new drivers/net/netdevsim/bus.c:442 [inline] new_device_store+0x2c0/0x594 drivers/net/netdevsim/bus.c:173 bus_attr_store+0x80/0xa4 drivers/base/bus.c:172 sysfs_kf_write+0x1a8/0x23c fs/sysfs/file.c:145 kernfs_fop_write_iter+0x314/0x488 fs/kernfs/file.c:334 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x62c/0x97c 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+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596