BTRFS warning (device loop3): couldn't read tree root
BTRFS warning (device loop3): try to load backup roots slot 3
BTRFS info (device loop3): rebuilding free space tree
BTRFS info (device loop3): checking UUID tree
BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 0 PID: 6730 Comm: syz.3.438 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __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:3772 [inline]
 validate_chain kernel/locking/lockdep.c:3793 [inline]
 __lock_acquire+0x1b40/0x6544 kernel/locking/lockdep.c:5049
 lock_acquire+0x20c/0x644 kernel/locking/lockdep.c:5662
 down_read_nested+0x68/0x308 kernel/locking/rwsem.c:1645
 __btrfs_tree_read_lock+0x40/0x35c fs/btrfs/locking.c:135
 btrfs_tree_read_lock fs/btrfs/locking.c:141 [inline]
 btrfs_read_lock_root_node+0x24c/0x360 fs/btrfs/locking.c:280
 btrfs_search_slot_get_root fs/btrfs/ctree.c:1721 [inline]
 btrfs_search_slot+0x4b0/0x2364 fs/btrfs/ctree.c:2047
 btrfs_lookup_inode+0xd8/0x38c fs/btrfs/inode-item.c:406
 __btrfs_update_delayed_inode+0x120/0xa0c fs/btrfs/delayed-inode.c:1015
 btrfs_update_delayed_inode fs/btrfs/delayed-inode.c:1096 [inline]
 __btrfs_commit_inode_delayed_items+0x16ac/0x1788 fs/btrfs/delayed-inode.c:1119
 __btrfs_run_delayed_items+0x1ac/0x440 fs/btrfs/delayed-inode.c:1153
 btrfs_run_delayed_items+0x24/0x34 fs/btrfs/delayed-inode.c:1190
 btrfs_commit_transaction+0x810/0x29f0 fs/btrfs/transaction.c:2287
 btrfs_sync_file+0xa4c/0xf44 fs/btrfs/file.c:2022
 btrfs_remap_file_range+0x6c8/0xbe4 fs/btrfs/reflink.c:923
 do_clone_file_range+0x248/0x2a8 fs/remap_range.c:396
 vfs_clone_file_range+0x28c/0x72c fs/remap_range.c:414
 ioctl_file_clone fs/ioctl.c:239 [inline]
 ioctl_file_clone_range fs/ioctl.c:258 [inline]
 do_vfs_ioctl+0x13c4/0x206c fs/ioctl.c:823
 __do_sys_ioctl fs/ioctl.c:868 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:856
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585