FAT-fs (loop3): error, fat_get_cluster: invalid cluster chain (i_pos 2074)
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 11474 Comm: syz.3.1169 Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026
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+0xfdc/0x2ebc kernel/locking/lockdep.c:5237
 lock_acquire+0x140/0x364 kernel/locking/lockdep.c:5868
 _raw_spin_lock_nested+0x50/0x6c kernel/locking/spinlock.c:382
 raw_spin_rq_lock_nested+0x2c/0x44 kernel/sched/core.c:652
 raw_spin_rq_lock kernel/sched/sched.h:1624 [inline]
 rq_lock kernel/sched/sched.h:1968 [inline]
 __schedule+0x394/0x2db8 kernel/sched/core.c:7064
 preempt_schedule_common+0xd4/0x190 kernel/sched/core.c:7370
 preempt_schedule+0x60/0x78 kernel/sched/core.c:7394
 irq_work_queue+0xa0/0xa4 kernel/irq_work.c:125
 nbcon_kthreads_wake+0x108/0x1f0 kernel/printk/nbcon.c:1339
 vprintk_emit+0x1f0/0x514 kernel/printk/printk.c:2461
 vprintk_default+0x54/0x80 kernel/printk/printk.c:2494
 vprintk+0x9c/0x114 kernel/printk/printk_safe.c:82
 _printk+0xe0/0x130 kernel/printk/printk.c:2504
 _fat_msg+0x104/0x160 fs/fat/misc.c:62
 __fat_fs_error+0x220/0x290 fs/fat/misc.c:31
 fat_get_cluster+0xa8c/0xc28 fs/fat/cache.c:-1
 fat_free fs/fat/file.c:349 [inline]
 fat_truncate_blocks+0x388/0x8e8 fs/fat/file.c:397
 fat_write_failed+0xa0/0xc0 fs/fat/inode.c:219
 fat_write_end+0xa4/0x180 fs/fat/inode.c:247
 generic_perform_write+0x504/0x7a4 mm/filemap.c:4346
 __generic_file_write_iter+0xfc/0x204 mm/filemap.c:4442
 generic_file_write_iter+0xb4/0x2ec mm/filemap.c:4468
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x51c/0xa0c fs/read_write.c:688
 ksys_pwrite64+0x118/0x1ac fs/read_write.c:795
 __do_sys_pwrite64 fs/read_write.c:803 [inline]
 __se_sys_pwrite64 fs/read_write.c:800 [inline]
 __arm64_sys_pwrite64+0xa0/0xb8 fs/read_write.c:800
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140
 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:736
 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594
FAT-fs (loop3): error, fat_get_cluster: invalid cluster chain (i_pos 2074)
FAT-fs (loop3): error, fat_get_cluster: invalid cluster chain (i_pos 2074)