BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 PID: 9128 Comm: kworker/u4:2 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: loop0 loop_rootcg_workfn
Call Trace:
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 add_chain_cache kernel/locking/lockdep.c:3637 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3736 [inline]
 validate_chain kernel/locking/lockdep.c:3757 [inline]
 __lock_acquire.cold+0x372/0x3ab kernel/locking/lockdep.c:5015
 lock_acquire kernel/locking/lockdep.c:5625 [inline]
 lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5590
 percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
 __sb_start_write include/linux/fs.h:1812 [inline]
 sb_start_write include/linux/fs.h:1882 [inline]
 file_start_write include/linux/fs.h:3008 [inline]
 lo_write_bvec+0x3b6/0x6d0 drivers/block/loop.c:327
 lo_write_simple drivers/block/loop.c:350 [inline]
 do_req_filebacked drivers/block/loop.c:668 [inline]
 loop_handle_cmd drivers/block/loop.c:2201 [inline]
 loop_process_work+0xc60/0x24e0 drivers/block/loop.c:2241
 process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295