3743 zfs needs a refcount audit
Submitted by:   Will Andrews <willa@spectralogic.com>
Submitted by:   Justin Gibbs <justing@spectralogic.com>
Reviewed by:    Matthew Ahrens <mahrens@delphix.com>

*** 354,365 ****
          if (err != 0)
                  return (err);
  
          /* Make sure dsobj has the correct object type. */
          dmu_object_info_from_db(dbuf, &doi);
!         if (doi.doi_type != DMU_OT_DSL_DATASET)
                  return (SET_ERROR(EINVAL));
  
          ds = dmu_buf_get_user(dbuf);
          if (ds == NULL) {
                  dsl_dataset_t *winner = NULL;
  
--- 354,367 ----
          if (err != 0)
                  return (err);
  
          /* Make sure dsobj has the correct object type. */
          dmu_object_info_from_db(dbuf, &doi);
!         if (doi.doi_type != DMU_OT_DSL_DATASET) {
!                 dmu_buf_rele(dbuf, tag);
                  return (SET_ERROR(EINVAL));
+         }
  
          ds = dmu_buf_get_user(dbuf);
          if (ds == NULL) {
                  dsl_dataset_t *winner = NULL;