commit c3ec475c5dd16499aa040908e11d382c3ded9692
Author: Siddhesh Poyarekar <siddhesh@redhat.com>
Date:   Mon May 26 11:40:08 2014 +0530

    Use NSS_STATUS_TRYAGAIN to indicate insufficient buffer (BZ #16878)
    
    The netgroups nss modules in the glibc tree use NSS_STATUS_UNAVAIL
    (with errno as ERANGE) when the supplied buffer does not have
    sufficient space for the result.  This is wrong, because the canonical
    way to indicate insufficient buffer is to set the errno to ERANGE and
    the status to NSS_STATUS_TRYAGAIN, as is used by all other modules.
    
    This fixes nscd behaviour when the nss_ldap module returns
    NSS_STATUS_TRYAGAIN to indicate that a netgroup entry is too long to
    fit into the supplied buffer.

diff --git glibc-2.17-c758a686/nscd/netgroupcache.c glibc-2.17-c758a686/nscd/netgroupcache.c
index b3d40e9..edab174 100644
--- glibc-2.17-c758a686/nscd/netgroupcache.c
+++ glibc-2.17-c758a686/nscd/netgroupcache.c
@@ -197,11 +197,6 @@ addgetnetgrentX (struct database_dyn *db, int fd, request_header *req,
 		    int e;
 		    status = getfct.f (&data, buffer + buffilled,
 				       buflen - buffilled - req->key_len, &e);
-		    if (status == NSS_STATUS_RETURN
-			|| status == NSS_STATUS_NOTFOUND)
-		      /* This was either the last one for this group or the
-			 group was empty.  Look at next group if available.  */
-		      break;
 		    if (status == NSS_STATUS_SUCCESS)
 		      {
 			if (data.type == triple_val)
@@ -320,11 +315,18 @@ addgetnetgrentX (struct database_dyn *db, int fd, request_header *req,
 			      }
 			  }
 		      }
-		    else if (status == NSS_STATUS_UNAVAIL && e == ERANGE)
+		    else if (status == NSS_STATUS_TRYAGAIN && e == ERANGE)
 		      {
 			buflen *= 2;
 			buffer = xrealloc (buffer, buflen);
 		      }
+		    else if (status == NSS_STATUS_RETURN
+			     || status == NSS_STATUS_NOTFOUND
+			     || status == NSS_STATUS_UNAVAIL)
+		      /* This was either the last one for this group or the
+			 group was empty or the NSS module had an internal
+			 failure.  Look at next group if available.  */
+		      break;
 		  }
 
 	      enum nss_status (*endfct) (struct __netgrent *);
diff --git glibc-2.17-c758a686/nss/nss_files/files-netgrp.c glibc-2.17-c758a686/nss/nss_files/files-netgrp.c
index 34eae4c..bc0b367 100644
--- glibc-2.17-c758a686/nss/nss_files/files-netgrp.c
+++ glibc-2.17-c758a686/nss/nss_files/files-netgrp.c
@@ -252,7 +252,7 @@ _nss_netgroup_parseline (char **cursor, struct __netgrent *result,
   if (cp - host > buflen)
     {
       *errnop = ERANGE;
-      status = NSS_STATUS_UNAVAIL;
+      status = NSS_STATUS_TRYAGAIN;
     }
   else
     {