BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 136 Comm: kworker/u4:1 Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: loop7 loop_rootcg_workfn
Call trace:
 dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 add_chain_cache kernel/locking/lockdep.c:-1 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3735 [inline]
 validate_chain kernel/locking/lockdep.c:3756 [inline]
 __lock_acquire+0x1b30/0x651c kernel/locking/lockdep.c:5012
 lock_acquire+0x1f4/0x620 kernel/locking/lockdep.c:5623
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xc4/0x14c kernel/locking/spinlock.c:162
 lock_page_lruvec_irqsave+0x10c/0x270 mm/memcontrol.c:1275
 relock_page_lruvec_irqsave include/linux/memcontrol.h:1573 [inline]
 pagevec_lru_move_fn+0x278/0x55c mm/swap.c:196
 activate_page mm/swap.c:338 [inline]
 mark_page_accessed+0xac0/0x1190 mm/swap.c:422
 shmem_file_read_iter+0x47c/0x6f8 mm/shmem.c:2610
 do_iter_readv_writev+0x3a0/0x4f8 fs/read_write.c:-1
 do_iter_read+0x1d4/0x698 fs/read_write.c:790
 vfs_iter_read+0x88/0xac fs/read_write.c:832
 lo_read_simple drivers/block/loop.c:392 [inline]
 do_req_filebacked drivers/block/loop.c:663 [inline]
 loop_handle_cmd drivers/block/loop.c:2235 [inline]
 loop_process_work+0x1648/0x20d0 drivers/block/loop.c:2275
 loop_rootcg_workfn+0x28/0x38 drivers/block/loop.c:2306
 process_one_work+0x79c/0x1140 kernel/workqueue.c:2310
 worker_thread+0x8f4/0x101c kernel/workqueue.c:2457
 kthread+0x374/0x454 kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870