[MM-50080] Limit max length for the name field (#22282)

app/work_templates.go

@@ -68,6 +68,12 @@ func (a *App) executeWorkTemplate(
 		ChannelIDs:             []string{},
 	}
 
+	if wtcr.Name != "" {
+		if len(wtcr.Name) > model.ChannelNameMaxLength {
+			return res, model.NewAppError("ExecuteWorkTemplate", "app.worktemplates.execute_work_template.name_too_long", nil, "", http.StatusBadRequest)
+		}
+	}
+
 	contentByType := map[string][]model.WorkTemplateContent{
 		"channel":     {},
 		"board":       {},

app/work_templates_test.go

@@ -4,6 +4,8 @@
 package app
 
 import (
+	"net/http"
+	"strings"
 	"testing"
 	"time"
 
@@ -228,4 +230,10 @@ func TestExecuteWorkTemplate(t *testing.T) {
 
 		executorMock.AssertExpectations(t)
 	})
+	t.Run("with name too long", func(t *testing.T) {
+		req.Name = strings.Repeat("a", model.ChannelNameMaxLength+1)
+		_, appErr := th.App.executeWorkTemplate(c, req, nil, false)
+		assert.NotNil(t, appErr)
+		assert.Equal(t, http.StatusBadRequest, appErr.StatusCode)
+	})
 }