diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 752acff2c734..bae6c54e4f87 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -3806,6 +3806,10 @@ static long btrfs_ioctl_qgroup_create(struct file *file, void __user *arg) } if (sa->create) { + if (sa->qgroupid == BTRFS_FIRST_FREE_OBJECTID) { + ret = -EINVAL; + goto out; + } ret = btrfs_create_qgroup(trans, sa->qgroupid); } else { ret = btrfs_remove_qgroup(trans, sa->qgroupid);