Properly cache the result from looking up the nss database config

ChangeLog

@@ -1,3 +1,11 @@
+2013-09-30  Andreas Schwab  <schwab@suse.de>
+
+	[BZ #15048]
+	* nscd/aicache.c (addhstaiX): Properly use the cache variable for
+	the nss database lookup.
+	* nscd/initgrcache.c (addinitgroupsX): Likewise.
+	* sysdeps/posix/getaddrinfo.c (gaih_inet): Likewise.
+
 2013-09-28  Mike Frysinger  <vapier@gentoo.org>
 
 	* sysdeps/unix/sysv/linux/tst-fanotify.c (do_test): Fix style.

NEWS

@@ -9,11 +9,11 @@ Version 2.19
 
 * The following bugs are resolved with this release:
 
-  13985, 14155, 14547, 14699, 15400, 15427, 15522, 15531, 15532, 15608,
-  15609, 15610, 15640, 15681, 15736, 15748, 15749, 15754, 15797, 15844,
-  15849, 15855, 15856, 15857, 15859, 15867, 15886, 15887, 15890, 15892,
-  15893, 15895, 15897, 15905, 15909, 15919, 15921, 15923, 15939, 15963,
-  15966.
+  13985, 14155, 14547, 14699, 15048, 15400, 15427, 15522, 15531, 15532,
+  15608, 15609, 15610, 15640, 15681, 15736, 15748, 15749, 15754, 15797,
+  15844, 15849, 15855, 15856, 15857, 15859, 15867, 15886, 15887, 15890,
+  15892, 15893, 15895, 15897, 15905, 15909, 15919, 15921, 15923, 15939,
+  15963, 15966.
 
 * CVE-2012-4412 The strcoll implementation caches indices and rules for
   large collation sequences to optimize multiple passes.  This cache

nscd/aicache.c

@@ -86,20 +86,19 @@ addhstaiX (struct database_dyn *db, int fd, request_header *req,
     }
 
   static service_user *hosts_database;
-  service_user *nip = NULL;
+  service_user *nip;
   int no_more;
   int rc6 = 0;
   int rc4 = 0;
   int herrno = 0;
 
-  if (hosts_database != NULL)
-    {
-      nip = hosts_database;
-      no_more = 0;
-    }
-  else
+  if (hosts_database == NULL)
     no_more = __nss_database_lookup ("hosts", NULL,
-				     "dns [!UNAVAIL=return] files", &nip);
+				     "dns [!UNAVAIL=return] files",
+				     &hosts_database);
+  else
+    no_more = 0;
+  nip = hosts_database;
 
   /* Initialize configurations.  */
   if (__glibc_unlikely (!_res_hconf.initialized))

nscd/initgrcache.c

@@ -80,17 +80,16 @@ addinitgroupsX (struct database_dyn *db, int fd, request_header *req,
     }
 
   static service_user *group_database;
-  service_user *nip = NULL;
+  service_user *nip;
   int no_more;
 
-  if (group_database != NULL)
-    {
-      nip = group_database;
-      no_more = 0;
-    }
-  else
+  if (group_database == NULL)
     no_more = __nss_database_lookup ("group", NULL,
-				     "compat [NOTFOUND=return] files", &nip);
+				     "compat [NOTFOUND=return] files",
+				     &group_database);
+  else
+    no_more = 0;
+  nip = group_database;
 
  /* We always use sysconf even if NGROUPS_MAX is defined.  That way, the
      limit can be raised in the kernel configuration without having to

sysdeps/posix/getaddrinfo.c

@@ -558,7 +558,7 @@ gaih_inet (const char *name, const struct gaih_service *service,
 	  struct gaih_addrtuple **pat = &at;
 	  int no_data = 0;
 	  int no_inet6_data = 0;
-	  service_user *nip = NULL;
+	  service_user *nip;
 	  enum nss_status inet6_status = NSS_STATUS_UNAVAIL;
 	  enum nss_status status = NSS_STATUS_UNAVAIL;
 	  int no_more;
@@ -791,15 +791,13 @@ gaih_inet (const char *name, const struct gaih_service *service,
 	    }
 #endif
 
-	  if (__nss_hosts_database != NULL)
-	    {
-	      no_more = 0;
-	      nip = __nss_hosts_database;
-	    }
-	  else
+	  if (__nss_hosts_database == NULL)
 	    no_more = __nss_database_lookup ("hosts", NULL,
 					     "dns [!UNAVAIL=return] files",
-					     &nip);
+					     &__nss_hosts_database);
+	  else
+	    no_more = 0;
+	  nip = __nss_hosts_database;
 
 	  /* Initialize configurations.  */
 	  if (__glibc_unlikely (!_res_hconf.initialized))