BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! turning off the locking correctness validator. CPU: 1 UID: 0 PID: 8361 Comm: syz.1.235 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 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+0xf9c/0x30a4 kernel/locking/lockdep.c:5237 lock_acquire+0x140/0x2e0 kernel/locking/lockdep.c:5868 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x5c/0x7c kernel/locking/spinlock.c:162 percpu_counter_add_batch+0x268/0x394 lib/percpu_counter.c:101 lock_extent_buffer_for_io+0x4b4/0x694 fs/btrfs/extent_io.c:1938 btree_write_cache_pages+0x810/0xe2c fs/btrfs/extent_io.c:2347 btree_writepages+0x70/0x19c fs/btrfs/disk-io.c:520 do_writepages+0x270/0x468 mm/page-writeback.c:2598 filemap_writeback mm/filemap.c:387 [inline] filemap_fdatawrite_range+0x154/0x1fc mm/filemap.c:412 btrfs_write_marked_extents+0x174/0x28c fs/btrfs/transaction.c:1164 btrfs_write_and_wait_transaction+0xdc/0x1e8 fs/btrfs/transaction.c:1272 btrfs_commit_transaction+0x1a14/0x2d30 fs/btrfs/transaction.c:2551 btrfs_sync_file+0xa64/0xf78 fs/btrfs/file.c:1819 vfs_fsync_range+0x160/0x19c fs/sync.c:188 generic_write_sync include/linux/fs.h:2616 [inline] btrfs_do_write_iter+0x4a4/0x610 fs/btrfs/file.c:1470 btrfs_file_write_iter+0x2c/0x3c fs/btrfs/file.c:1480 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x540/0xa3c fs/read_write.c:686 ksys_write+0x120/0x210 fs/read_write.c:738 __do_sys_write fs/read_write.c:749 [inline] __se_sys_write fs/read_write.c:746 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:746 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 bridge0: port 2(bridge_slave_1) entered forwarding state