BTRFS info (device loop9): first mount of filesystem ed167579-eb65-4e76-9a50-61ac97e9b59d BTRFS info (device loop9): using sha256 (sha256-ce) checksum algorithm BTRFS info (device loop9): using free-space-tree BTRFS info (device loop9): rebuilding free space tree BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! turning off the locking correctness validator. CPU: 1 UID: 0 PID: 8467 Comm: syz.9.300 Not tainted 6.12.0-syzkaller-g7b1d1d4cfac0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:484 (C) __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 lookup_chain_cache_add kernel/locking/lockdep.c:3851 [inline] validate_chain kernel/locking/lockdep.c:3872 [inline] __lock_acquire+0x1fb8/0x77c8 kernel/locking/lockdep.c:5202 lock_acquire+0x240/0x728 kernel/locking/lockdep.c:5825 down_write_nested+0x58/0xcc kernel/locking/rwsem.c:1693 btrfs_tree_lock_nested+0x44/0x34c fs/btrfs/locking.c:204 btrfs_tree_lock fs/btrfs/locking.h:169 [inline] btrfs_search_slot+0x145c/0x2a08 fs/btrfs/ctree.c:2214 btrfs_update_root+0xec/0xa90 fs/btrfs/root-tree.c:144 commit_fs_roots+0x430/0x69c fs/btrfs/transaction.c:1511 btrfs_commit_transaction+0x112c/0x2ba4 fs/btrfs/transaction.c:2430 create_snapshot+0x58c/0x83c fs/btrfs/ioctl.c:874 btrfs_mksubvol+0x4f8/0x600 fs/btrfs/ioctl.c:1028 btrfs_mksnapshot+0xc4/0x154 fs/btrfs/ioctl.c:1074 __btrfs_ioctl_snap_create+0x314/0x3fc fs/btrfs/ioctl.c:1339 btrfs_ioctl_snap_create_v2+0x1b0/0x30c fs/btrfs/ioctl.c:1421 btrfs_ioctl+0x994/0xaec vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:893 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 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+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600