Fix memory corruption when GEOMTRANSFORM and SHADOWCOLOR is used in label simultaneously #6114

Author: github-actions[bot]

maplabel.c

@@ -143,6 +143,16 @@ void msCopyTextSymbol(textSymbolObj *dst, textSymbolObj *src) {
     dst->textpath = msSmallMalloc(sizeof(textPathObj));
     msCopyTextPath(dst->textpath,src->textpath);
   }
+  if(dst->style_bounds) {
+    int i;
+    dst->style_bounds = msSmallCalloc(src->label->numstyles, sizeof(label_bounds*));
+    for(i=0; i<src->label->numstyles; i++) {
+      if(src->style_bounds[i]) {
+        dst->style_bounds[i] = msSmallMalloc(sizeof(label_bounds));
+        copyLabelBounds(dst->style_bounds[i], src->style_bounds[i]);
+      }
+    }
+  }
 }
 
 static int labelNeedsDeepCopy(labelObj *label) {

mapserver.h

@@ -1843,6 +1843,7 @@ void msCopyTextPath(textPathObj *dst, textPathObj *src);
 void freeTextPath(textPathObj *tp);
 void initTextSymbol(textSymbolObj *ts);
 void freeTextSymbol(textSymbolObj *ts);
+void copyLabelBounds(label_bounds *dst, label_bounds *src);
 void msCopyTextSymbol(textSymbolObj *dst, textSymbolObj *src);
 void msPopulateTextSymbolForLabelAndString(textSymbolObj *ts, labelObj *l, char *string, double scalefactor, double resolutionfactor, label_cache_mode cache);
 #endif /* SWIG */