BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 8736 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+0x14c/0x2e0 kernel/locking/lockdep.c:5868
 _raw_spin_lock_nested+0x50/0x6c kernel/locking/spinlock.c:378
 raw_spin_rq_lock_nested kernel/sched/core.c:638 [inline]
 raw_spin_rq_lock kernel/sched/sched.h:1546 [inline]
 rq_lock kernel/sched/sched.h:1868 [inline]
 __schedule+0x338/0x2864 kernel/sched/core.c:6833
 preempt_schedule_common+0xe0/0x194 kernel/sched/core.c:7113
 preempt_schedule+0x60/0x80 kernel/sched/core.c:7137
 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
 _raw_spin_unlock_irq+0x7c/0x80 kernel/locking/spinlock.c:202
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 wb_queue_work+0x2e0/0x594 fs/fs-writeback.c:200
 bdi_split_work_to_wbs+0x430/0x734 fs/fs-writeback.c:1072
 __writeback_inodes_sb_nr+0x1a8/0x218 fs/fs-writeback.c:2786
 writeback_inodes_sb_nr fs/fs-writeback.c:2804 [inline]
 writeback_inodes_sb+0x78/0x8c fs/fs-writeback.c:2819
 sync_filesystem+0xa0/0x218 fs/sync.c:54
 ovl_sync_fs+0x114/0x15c fs/overlayfs/super.c:254
 sync_filesystem+0x1a0/0x218 fs/sync.c:66
 generic_shutdown_super+0x70/0x2b8 fs/super.c:621
 kill_anon_super+0x4c/0x7c fs/super.c:1281
 deactivate_locked_super+0xc4/0x12c fs/super.c:473
 deactivate_super+0xe0/0x100 fs/super.c:506
 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1327
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1334
 task_work_run+0x1dc/0x260 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xfc/0x178 kernel/entry/common.c:43
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:103 [inline]
 el0_svc+0x170/0x254 arch/arm64/kernel/entry-common.c:747
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:765
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
EXT4-fs error (device loop9): ext4_readdir:264: inode #12: block 80: comm syz-executor: path /4/file1/file0: bad entry in directory: rec_len is smaller than minimal - offset=12, inode=6, rec_len=0, size=4096 fake=0
EXT4-fs error (device loop9): ext4_empty_dir:3096: inode #12: block 80: comm syz-executor: bad entry in directory: rec_len is smaller than minimal - offset=12, inode=6, rec_len=0, size=4096 fake=0
EXT4-fs warning (device loop9): ext4_empty_dir:3099: inode #12: comm syz-executor: directory missing '..'
EXT4-fs error (device loop9): ext4_readdir:264: inode #12: block 80: comm syz-executor: path /4/file1/file0: bad entry in directory: rec_len is smaller than minimal - offset=12, inode=6, rec_len=0, size=4096 fake=0
EXT4-fs error (device loop9): ext4_empty_dir:3096: inode #12: block 80: comm syz-executor: bad entry in directory: rec_len is smaller than minimal - offset=12, inode=6, rec_len=0, size=4096 fake=0
EXT4-fs warning (device loop9): ext4_empty_dir:3099: inode #12: comm syz-executor: directory missing '..'
EXT4-fs error (device loop9): ext4_readdir:264: inode #12: block 80: comm syz-executor: path /4/file1/file0: bad entry in directory: rec_len is smaller than minimal - offset=12, inode=6, rec_len=0, size=4096 fake=0
EXT4-fs error (device loop9): ext4_empty_dir:3096: inode #12: block 80: comm syz-executor: bad entry in directory: rec_len is smaller than minimal - offset=12, inode=6, rec_len=0, size=4096 fake=0
EXT4-fs warning (device loop9): ext4_empty_dir:3099: inode #12: comm syz-executor: directory missing '..'
EXT4-fs error (device loop9): ext4_readdir:264: inode #12: block 80: comm syz-executor: path /4/file1/file0: bad entry in directory: rec_len is smaller than minimal - offset=12, inode=6, rec_len=0, size=4096 fake=0
EXT4-fs error (device loop9): ext4_empty_dir:3096: inode #12: block 80: comm syz-executor: bad entry in directory: rec_len is smaller than minimal - offset=12, inode=6, rec_len=0, size=4096 fake=0
EXT4-fs warning (device loop9): ext4_empty_dir:3099: inode #12: comm syz-executor: directory missing '..'
EXT4-fs error (device loop9): ext4_readdir:264: inode #12: block 80: comm syz-executor: path /4/file1/file0: bad entry in directory: rec_len is smaller than minimal - offset=12, inode=6, rec_len=0, size=4096 fake=0
EXT4-fs error (device loop9): ext4_empty_dir:3096: inode #12: block 80: comm syz-executor: bad entry in directory: rec_len is smaller than minimal - offset=12, inode=6, rec_len=0, size=4096 fake=0
EXT4-fs warning (device loop9): ext4_empty_dir:3099: inode #12: comm syz-executor: directory missing '..'
EXT4-fs warning (device loop9): ext4_empty_dir:3099: inode #12: comm syz-executor: directory missing '..'
EXT4-fs warning (device loop9): ext4_empty_dir:3099: inode #12: comm syz-executor: directory missing '..'
EXT4-fs warning (device loop9): ext4_empty_dir:3099: inode #12: comm syz-executor: directory missing '..'
EXT4-fs warning (device loop9): ext4_empty_dir:3099: inode #12: comm syz-executor: directory missing '..'
EXT4-fs warning (device loop9): ext4_empty_dir:3099: inode #12: comm syz-executor: directory missing '..'
EXT4-fs (loop9): unmounting filesystem 00000000-0000-0000-0000-000000000000.