diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 752acff2c734..21cf7a7f18ab 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -3799,6 +3799,11 @@ static long btrfs_ioctl_qgroup_create(struct file *file, void __user *arg) goto out; } + if (sa->create && sa->qgroupid == BTRFS_FIRST_FREE_OBJECTID) { + ret = -EINVAL; + goto out; + } + trans = btrfs_join_transaction(root); if (IS_ERR(trans)) { ret = PTR_ERR(trans);