commit fbd6b5a4052316f7eb03c4617eebfaafc59dcc06
Author: Siddhesh Poyarekar <siddhesh@redhat.com>
Date:   Thu Mar 27 07:15:22 2014 +0530
 
    Fix nscd lookup for innetgr when netgroup has wildcards (BZ #16758)
    
    nscd works correctly when the request in innetgr is a wildcard,
    i.e. when one or more of host, user or domain parameters is NULL.
    However, it does not work when the the triplet in the netgroup
    definition has a wildcard.  This is easy to reproduce for a triplet
    defined as follows:
    
        foonet (,foo,)
    
    Here, an innetgr call that looks like this:
    
        innetgr ("foonet", "foohost", "foo", NULL);
    
    should succeed and so should:
    
        innetgr ("foonet", NULL, "foo", "foodomain");
    
    It does succeed with nscd disabled, but not with nscd enabled.  This
    fix adds this additional check for all three parts of the triplet so
    that it gives the correct result.
    
    	[BZ #16758]
    	* nscd/netgroupcache.c (addinnetgrX): Succeed if triplet has
    	blank values.
 
diff --git glibc-2.17-c758a686/nscd/netgroupcache.c glibc-2.17-c758a686/nscd/netgroupcache.c
index 5ba1e1f..5d15aa4 100644
--- glibc-2.17-c758a686/nscd/netgroupcache.c
+++ glibc-2.17-c758a686/nscd/netgroupcache.c
@@ -560,15 +560,19 @@ addinnetgrX (struct database_dyn *db, int fd, request_header *req,
 	{
 	  bool success = true;
 
-	  if (host != NULL)
+	  /* For the host, user and domain in each triplet, we assume success
+	     if the value is blank because that is how the wildcard entry to
+	     match anything is stored in the netgroup cache.  */
+	  if (host != NULL && *triplets != '\0')
 	    success = strcmp (host, triplets) == 0;
 	  triplets = (const char *) rawmemchr (triplets, '\0') + 1;
 
-	  if (success && user != NULL)
+	  if (success && user != NULL && *triplets != '\0')
 	    success = strcmp (user, triplets) == 0;
 	  triplets = (const char *) rawmemchr (triplets, '\0') + 1;
 
-	  if (success && (domain == NULL || strcmp (domain, triplets) == 0))
+	  if (success && (domain == NULL || *triplets == '\0'
+			  || strcmp (domain, triplets) == 0))
 	    {
 	      dataset->resp.result = 1;
 	      break;