Fix crash resulting from frames with invalid data pointers.
[asterisk/asterisk.git] / main / frame.c
index 1f1476c..c90469b 100644 (file)
@@ -435,6 +435,11 @@ struct ast_frame *ast_frisolate(struct ast_frame *fr)
        }
        
        if (!(fr->mallocd & AST_MALLOCD_DATA))  {
+               if (!fr->datalen) {
+                       out->data.uint32 = fr->data.uint32;
+                       out->mallocd = AST_MALLOCD_HDR | AST_MALLOCD_SRC;
+                       return out;
+               }
                if (!(newdata = ast_malloc(fr->datalen + AST_FRIENDLY_OFFSET))) {
                        if (out->src != fr->src) {
                                ast_free((void *) out->src);