Never add labels not from this repository or organisation and remove org labels on transfer (#14928)

* Never add labels not from this repository or organisation and remove org labels on transfer

Prevent the addition of labels from outside of the repository or
organisation and remove organisation labels on transfer.

Related #14908

* switch to use sql

* subquery alias

* once more around the merry go round

* fix api problem

integrations/api_issue_label_test.go

@@ -91,22 +91,22 @@ func TestAPIAddIssueLabels(t *testing.T) {
 
 	repo := models.AssertExistsAndLoadBean(t, &models.Repository{ID: 1}).(*models.Repository)
 	issue := models.AssertExistsAndLoadBean(t, &models.Issue{RepoID: repo.ID}).(*models.Issue)
-	label := models.AssertExistsAndLoadBean(t, &models.Label{RepoID: repo.ID}).(*models.Label)
+	_ = models.AssertExistsAndLoadBean(t, &models.Label{RepoID: repo.ID, ID: 2}).(*models.Label)
 	owner := models.AssertExistsAndLoadBean(t, &models.User{ID: repo.OwnerID}).(*models.User)
 
 	session := loginUser(t, owner.Name)
 	token := getTokenForLoggedInUser(t, session)
 	urlStr := fmt.Sprintf("/api/v1/repos/%s/%s/issues/%d/labels?token=%s",
-		owner.Name, repo.Name, issue.Index, token)
+		repo.OwnerName, repo.Name, issue.Index, token)
 	req := NewRequestWithJSON(t, "POST", urlStr, &api.IssueLabelsOption{
-		Labels: []int64{label.ID},
+		Labels: []int64{1, 2},
 	})
 	resp := session.MakeRequest(t, req, http.StatusOK)
 	var apiLabels []*api.Label
 	DecodeJSON(t, resp, &apiLabels)
 	assert.Len(t, apiLabels, models.GetCount(t, &models.IssueLabel{IssueID: issue.ID}))
 
-	models.AssertExistsAndLoadBean(t, &models.IssueLabel{IssueID: issue.ID, LabelID: label.ID})
+	models.AssertExistsAndLoadBean(t, &models.IssueLabel{IssueID: issue.ID, LabelID: 2})
 }
 
 func TestAPIReplaceIssueLabels(t *testing.T) {

models/issue.go

@@ -513,6 +513,10 @@ func (issue *Issue) ReplaceLabels(labels []*Label, doer *User) (err error) {
 		return err
 	}
 
+	if err = issue.loadRepo(sess); err != nil {
+		return err
+	}
+
 	if err = issue.loadLabels(sess); err != nil {
 		return err
 	}
@@ -527,10 +531,18 @@ func (issue *Issue) ReplaceLabels(labels []*Label, doer *User) (err error) {
 		addLabel := labels[addIndex]
 		removeLabel := issue.Labels[removeIndex]
 		if addLabel.ID == removeLabel.ID {
+			// Silently drop invalid labels
+			if removeLabel.RepoID != issue.RepoID && removeLabel.OrgID != issue.Repo.OwnerID {
+				toRemove = append(toRemove, removeLabel)
+			}
+
 			addIndex++
 			removeIndex++
 		} else if addLabel.ID < removeLabel.ID {
-			toAdd = append(toAdd, addLabel)
+			// Only add if the label is valid
+			if addLabel.RepoID == issue.RepoID || addLabel.OrgID == issue.Repo.OwnerID {
+				toAdd = append(toAdd, addLabel)
+			}
 			addIndex++
 		} else {
 			toRemove = append(toRemove, removeLabel)

models/issue_label.go

@@ -321,7 +321,7 @@ func GetLabelsByIDs(labelIDs []int64) ([]*Label, error) {
 	return labels, x.Table("label").
 		In("id", labelIDs).
 		Asc("name").
-		Cols("id").
+		Cols("id", "repo_id", "org_id").
 		Find(&labels)
 }
 
@@ -632,6 +632,8 @@ func HasIssueLabel(issueID, labelID int64) bool {
 	return hasIssueLabel(x, issueID, labelID)
 }
 
+// newIssueLabel this function creates a new label it does not check if the label is valid for the issue
+// YOU MUST CHECK THIS BEFORE THIS FUNCTION
 func newIssueLabel(e *xorm.Session, issue *Issue, label *Label, doer *User) (err error) {
 	if _, err = e.Insert(&IssueLabel{
 		IssueID: issue.ID,
@@ -671,6 +673,15 @@ func NewIssueLabel(issue *Issue, label *Label, doer *User) (err error) {
 		return err
 	}
 
+	if err = issue.loadRepo(sess); err != nil {
+		return err
+	}
+
+	// Do NOT add invalid labels
+	if issue.RepoID != label.RepoID && issue.Repo.OwnerID != label.OrgID {
+		return nil
+	}
+
 	if err = newIssueLabel(sess, issue, label, doer); err != nil {
 		return err
 	}
@@ -683,13 +694,19 @@ func NewIssueLabel(issue *Issue, label *Label, doer *User) (err error) {
 	return sess.Commit()
 }
 
+// newIssueLabels add labels to an issue. It will check if the labels are valid for the issue
 func newIssueLabels(e *xorm.Session, issue *Issue, labels []*Label, doer *User) (err error) {
-	for i := range labels {
-		if hasIssueLabel(e, issue.ID, labels[i].ID) {
+	if err = issue.loadRepo(e); err != nil {
+		return err
+	}
+	for _, label := range labels {
+		// Don't add already present labels and invalid labels
+		if hasIssueLabel(e, issue.ID, label.ID) ||
+			(label.RepoID != issue.RepoID && label.OrgID != issue.Repo.OwnerID) {
 			continue
 		}
 
-		if err = newIssueLabel(e, issue, labels[i], doer); err != nil {
+		if err = newIssueLabel(e, issue, label, doer); err != nil {
 			return fmt.Errorf("newIssueLabel: %v", err)
 		}
 	}

models/repo_transfer.go

@@ -325,6 +325,33 @@ func TransferOwnership(doer *User, newOwnerName string, repo *Repository) (err e
 		}
 	}
 
+	// Delete labels that belong to the old organization and comments that added these labels
+	if oldOwner.IsOrganization() {
+		if _, err := sess.Exec(`DELETE FROM issue_label WHERE issue_label.id IN (
+			SELECT il_too.id FROM (
+				SELECT il_too_too.id
+					FROM issue_label AS il_too_too
+						INNER JOIN label ON il_too_too.id = label.id
+						INNER JOIN issue on issue.id = il_too_too.issue_id
+					WHERE
+						issue.repo_id = ? AND (issue.repo_id != label.repo_id OR (label.repo_id = 0 AND label.org_id != ?))
+		) AS il_too )`, repo.ID, newOwner.ID); err != nil {
+			return fmt.Errorf("Unable to remove old org labels: %v", err)
+		}
+
+		if _, err := sess.Exec(`DELETE FROM comment WHERE comment.id IN (
+			SELECT il_too.id FROM (
+				SELECT com.id
+					FROM comment AS com
+						INNER JOIN label ON com.label_id = label.id
+						INNER JOIN issue on issue.id = com.issue_id
+					WHERE
+						com.type = ? AND issue.repo_id = ? AND (issue.repo_id != label.repo_id OR (label.repo_id = 0 AND label.org_id != ?))
+		) AS il_too)`, CommentTypeLabel, repo.ID, newOwner.ID); err != nil {
+			return fmt.Errorf("Unable to remove old org label comments: %v", err)
+		}
+	}
+
 	// Rename remote repository to new path and delete local copy.
 	dir := UserPath(newOwner.Name)