1 files changed, 10 insertions, 1 deletions
diff --git a/nis/nss_nisplus/nisplus-proto.c b/nis/nss_nisplus/nisplus-proto.c
index 0b96153819..42a2d088da 100644
--- a/nis/nss_nisplus/nisplus-proto.c
+++ b/nis/nss_nisplus/nisplus-proto.c
@@ -227,6 +227,11 @@ internal_nisplus_getprotoent_r (struct protoent *proto, char *buffer,
 	    }
 
 	  result = nis_first_entry (tablename_val);
+	  if (result == NULL)
+	    {
+	      *errnop = errno;
+	      return NSS_STATUS_TRYAGAIN;
+	    }
 	  if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
 	    return niserr2nss (result->status);
 	}
@@ -234,7 +239,11 @@ internal_nisplus_getprotoent_r (struct protoent *proto, char *buffer,
 	{
 	  saved_res = result;
 	  result = nis_next_entry (tablename_val, &result->cookie);
-
+	  if (result == NULL)
+	    {
+	      *errnop = errno;
+	      return NSS_STATUS_TRYAGAIN;
+	    }
 	  if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
 	    {
 	      nis_freeresult (saved_res);