btrfs: Fix bound checking in qgroup_trace_new_subtree_blocks

[uclinux-h8/linux.git] / fs / btrfs / qgroup.c

diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index eb680b7..e659d9d 100644 (file)
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -1922,8 +1922,8 @@ static int qgroup_trace_new_subtree_blocks(struct btrfs_trans_handle* trans,
        int i;
 
        /* Level sanity check */
-       if (cur_level < 0 || cur_level >= BTRFS_MAX_LEVEL ||
-           root_level < 0 || root_level >= BTRFS_MAX_LEVEL ||
+       if (cur_level < 0 || cur_level >= BTRFS_MAX_LEVEL - 1 ||
+           root_level < 0 || root_level >= BTRFS_MAX_LEVEL - 1 ||
            root_level < cur_level) {
                btrfs_err_rl(fs_info,
                        "%s: bad levels, cur_level=%d root_level=%d",