BUG: MAX_LOCKDEP_CHAINS too low! turning off the locking correctness validator. CPU: 1 PID: 4404 Comm: kworker/u4:13 Not tainted 5.15.173-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 Workqueue: loop5 loop_workfn Call trace: dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 lookup_chain_cache_add kernel/locking/lockdep.c:3735 [inline] validate_chain kernel/locking/lockdep.c:3756 [inline] __lock_acquire+0x1b64/0x7638 kernel/locking/lockdep.c:5012 lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5623 local_lock_acquire+0x3c/0x15c include/linux/local_lock_internal.h:29 free_unref_page_list+0x304/0x7a8 mm/page_alloc.c:3452 release_pages+0x1770/0x1a88 mm/swap.c:963 pagevec_lru_move_fn+0x4f4/0x5fc mm/swap.c:203 activate_page mm/swap.c:338 [inline] mark_page_accessed+0xb24/0x1238 mm/swap.c:422 shmem_file_read_iter+0x500/0x7b8 mm/shmem.c:2615 do_iter_readv_writev+0x420/0x5f8 do_iter_read+0x1c4/0x684 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:2234 [inline] loop_process_work+0x19f0/0x2798 drivers/block/loop.c:2274 loop_workfn+0x54/0x68 drivers/block/loop.c:2298 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310 worker_thread+0x910/0x1034 kernel/workqueue.c:2457 kthread+0x37c/0x45c kernel/kthread.c:334 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870