BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! turning off the locking correctness validator. CPU: 1 UID: 0 PID: 8724 Comm: syz.1.352 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+0x14c/0x2e0 kernel/locking/lockdep.c:5868 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x48/0x60 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] detach_extent_buffer_folio+0xb8/0x4c8 fs/btrfs/extent_io.c:2890 btrfs_release_extent_buffer_folios+0xa8/0x44c fs/btrfs/extent_io.c:2950 release_extent_buffer+0x168/0x260 fs/btrfs/extent_io.c:3599 free_extent_buffer_stale+0x164/0x218 fs/btrfs/extent_io.c:3659 btrfs_force_cow_block+0xd0c/0x2058 fs/btrfs/ctree.c:605 btrfs_cow_block+0x328/0x940 fs/btrfs/ctree.c:708 btrfs_search_slot+0x96c/0x223c fs/btrfs/ctree.c:2106 btrfs_update_root+0xe4/0xcd8 fs/btrfs/root-tree.c:144 update_log_root fs/btrfs/tree-log.c:3184 [inline] btrfs_sync_log+0xb8c/0x2200 fs/btrfs/tree-log.c:3451 btrfs_sync_file+0xa48/0xf78 fs/btrfs/file.c:1770 vfs_fsync_range+0x160/0x19c fs/sync.c:187 generic_write_sync include/linux/fs.h:3046 [inline] btrfs_do_write_iter+0x47c/0x5dc fs/btrfs/file.c:1469 btrfs_file_write_iter+0x2c/0x3c fs/btrfs/file.c:1479 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+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:746 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:765 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596