Fix vuln OSV-2024-123

Author: oss-patch

src/in_dxf.c

@@ -11718,13 +11718,18 @@ dxf_tables_read (Bit_Chain *restrict dat, Dwg_Data *restrict dwg)
               Dwg_Object *ctrl = &dwg->object[ctrl_id];
               char *dxfname = strdup (pair->value.s);
               BITCODE_H ref;
+              int realloced;
               dxf_free_pair (pair);
               // until 0 table or 0 ENDTAB
               pair = new_object (table, dxfname, dat, dwg, ctrl_id, (BITCODE_BL*)&i);
               if (!pair)
                 return DWG_ERR_INVALIDDWG;
               obj = &dwg->object[dwg->num_objects - 1];
               // A minimal DXF will have no handle values
+              realloced = dwg_add_object(dwg);
+              if (realloced == -1) {
+                ctrl = &dwg->object[ctrl_id];
+              }
               if (!obj->handle.value)
                 {
                   unsigned long next_handle = dwg_next_handle (dwg);