int TS_OBJ_print_bio(BIO *bio, const ASN1_OBJECT *obj)
 {
     char obj_txt[128];
 
    int len = OBJ_obj2txt(obj_txt, sizeof(obj_txt), obj, 0);
    BIO_write(bio, obj_txt, len);
    BIO_write(bio, "\n", 1);
 
     return 1;
 }

The product reads data past the end, or before the beginning, of the intended buffer.