EXT4-fs (loop6): warning: mounting unchecked fs, running e2fsck is recommended
EXT4-fs (loop6): Errors on filesystem, clearing orphan list.
EXT4-fs (loop6): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
BUG: MAX_LOCKDEP_KEYS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 19775 Comm: syz.6.1305 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 register_lock_class+0x2e8/0x320 kernel/locking/lockdep.c:1332
 __lock_acquire+0x99/0xd20 kernel/locking/lockdep.c:5112
 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868
 touch_wq_lockdep_map+0xcb/0x180 kernel/workqueue.c:3936
 __flush_workqueue+0x121/0x14b0 kernel/workqueue.c:3978
 ext4_sync_fs+0x220/0x6e0 fs/ext4/super.c:6353
 sync_filesystem+0xed/0x250 fs/sync.c:56
 generic_shutdown_super+0x6f/0x2c0 fs/super.c:621
 kill_block_super+0x44/0x90 fs/super.c:1729
 ext4_kill_sb+0x68/0xb0 fs/ext4/super.c:7403
 deactivate_locked_super+0xbc/0x130 fs/super.c:473
 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1318
 task_work_run+0x1d4/0x260 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xe9/0x130 kernel/entry/common.c:43
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x2bd/0xfa0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5ef54c0eea
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5ef3704e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffec RBX: 00007f5ef3704ef0 RCX: 00007f5ef54c0eea
RDX: 0000200000000140 RSI: 0000200000000080 RDI: 00007f5ef3704eb0
RBP: 0000200000000140 R08: 00007f5ef3704ef0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000080
R13: 00007f5ef3704eb0 R14: 000000000000046e R15: 00002000000001c0
 </TASK>
EXT4-fs (loop6): unmounting filesystem 00000000-0000-0000-0000-000000000000.