BUG: MAX_LOCKDEP_CHAINS too low! turning off the locking correctness validator. CPU: 0 UID: 0 PID: 7033 Comm: udevd Not tainted 6.16.0-rc1-syzkaller-00004-g39dfc971e42d #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:466 (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] __schedule+0x340/0x2a28 kernel/sched/core.c:6709 preempt_schedule_irq+0x80/0x188 kernel/sched/core.c:7108 arm64_preempt_schedule_irq+0x44/0x58 arch/arm64/kernel/entry-common.c:301 __el1_irq arch/arm64/kernel/entry-common.c:586 [inline] el1_interrupt+0x3c/0x54 arch/arm64/kernel/entry-common.c:598 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:603 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:596 check_kcov_mode kernel/kcov.c:183 [inline] (P) write_comp_data kernel/kcov.c:246 [inline] (P) __sanitizer_cov_trace_cmp8+0x4c/0x98 kernel/kcov.c:294 (P) kunwind_next_frame_record arch/arm64/kernel/stacktrace.c:225 [inline] kunwind_next arch/arm64/kernel/stacktrace.c:264 [inline] do_kunwind arch/arm64/kernel/stacktrace.c:292 [inline] kunwind_stack_walk arch/arm64/kernel/stacktrace.c:363 [inline] arch_stack_walk+0x210/0x368 arch/arm64/kernel/stacktrace.c:387 stack_trace_save+0x94/0xd8 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:68 kasan_save_alloc_info+0x44/0x54 mm/kasan/generic.c:562 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x70/0x88 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4148 [inline] slab_alloc_node mm/slub.c:4197 [inline] kmem_cache_alloc_noprof+0x238/0x3e8 mm/slub.c:4204 kmem_alloc_batch lib/debugobjects.c:371 [inline] fill_pool+0x118/0x4e8 lib/debugobjects.c:403 debug_objects_fill_pool+0x84/0xa0 lib/debugobjects.c:725 debug_object_activate+0x48/0x460 lib/debugobjects.c:814 debug_rcu_head_queue kernel/rcu/rcu.h:236 [inline] __call_rcu_common kernel/rcu/tree.c:3075 [inline] call_rcu+0x50/0x96c kernel/rcu/tree.c:3210 security_inode_free+0x9c/0x1b0 security/security.c:1735 __destroy_inode+0x2e8/0x7d0 fs/inode.c:371 destroy_inode fs/inode.c:394 [inline] evict+0x6bc/0x928 fs/inode.c:834 iput_final fs/inode.c:1898 [inline] iput+0x6e4/0x83c fs/inode.c:1924 dentry_unlink_inode+0x384/0x45c fs/dcache.c:466 __dentry_kill+0x170/0x594 fs/dcache.c:669 dput+0x1b8/0x290 fs/dcache.c:911 do_renameat2+0x75c/0xa40 fs/namei.c:-1 __do_sys_renameat fs/namei.c:5318 [inline] __se_sys_renameat fs/namei.c:5315 [inline] __arm64_sys_renameat+0xc0/0xdc fs/namei.c:5315 __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+0x58/0x17c arch/arm64/kernel/entry-common.c:767 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600