File nss-nis-stack-use.patch of Package glibc.i686

2014-05-12  Andreas Schwab  <schwab@suse.de>

	[BZ #16932]
	* nis/nss_nis/nis-hosts.c (internal_gethostbyname2_r)
	(_nss_nis_gethostbyname4_r): Return error if item length is larger
	than maximum RPC packet size.
	* nis/nss_nis/nis-initgroups.c (initgroups_netid): Likewise.
	* nis/nss_nis/nis-network.c (_nss_nis_getnetbyname_r): Likewise.
	* nis/nss_nis/nis-service.c (_nss_nis_getservbyname_r)
	(_nss_nis_getservbyport_r): Likewise.

Index: glibc-2.19/nis/nss_nis/nis-hosts.c
===================================================================
--- glibc-2.19.orig/nis/nss_nis/nis-hosts.c
+++ glibc-2.19/nis/nss_nis/nis-hosts.c
@@ -270,6 +270,13 @@ internal_gethostbyname2_r (const char *n
 
   /* Convert name to lowercase.  */
   size_t namlen = strlen (name);
+  /* Limit name length to the maximum size of an RPC packet.  */
+  if (namlen > UDPMSGSIZE)
+    {
+      *errnop = ERANGE;
+      return NSS_STATUS_UNAVAIL;
+    }
+
   char name2[namlen + 1];
   size_t i;
 
@@ -461,6 +468,13 @@ _nss_nis_gethostbyname4_r (const char *n
 
   /* Convert name to lowercase.  */
   size_t namlen = strlen (name);
+  /* Limit name length to the maximum size of an RPC packet.  */
+  if (namlen > UDPMSGSIZE)
+    {
+      *errnop = ERANGE;
+      return NSS_STATUS_UNAVAIL;
+    }
+
   char name2[namlen + 1];
   size_t i;
 
Index: glibc-2.19/nis/nss_nis/nis-initgroups.c
===================================================================
--- glibc-2.19.orig/nis/nss_nis/nis-initgroups.c
+++ glibc-2.19/nis/nss_nis/nis-initgroups.c
@@ -150,6 +150,13 @@ initgroups_netid (uid_t uid, gid_t group
 		  gid_t **groupsp, long int limit, int *errnop,
 		  const char *domainname)
 {
+  /* Limit domainname length to the maximum size of an RPC packet.  */
+  if (strlen (domainname) > UDPMSGSIZE)
+    {
+      *errnop = ERANGE;
+      return NSS_STATUS_UNAVAIL;
+    }
+
   /* Prepare the key.  The form is "unix.UID@DOMAIN" with the UID and
      DOMAIN field filled in appropriately.  */
   char key[sizeof ("unix.@") + sizeof (uid_t) * 3 + strlen (domainname)];
Index: glibc-2.19/nis/nss_nis/nis-network.c
===================================================================
--- glibc-2.19.orig/nis/nss_nis/nis-network.c
+++ glibc-2.19/nis/nss_nis/nis-network.c
@@ -179,6 +179,13 @@ _nss_nis_getnetbyname_r (const char *nam
 
   /* Convert name to lowercase.  */
   size_t namlen = strlen (name);
+  /* Limit name length to the maximum size of an RPC packet.  */
+  if (namlen > UDPMSGSIZE)
+    {
+      *errnop = ERANGE;
+      return NSS_STATUS_UNAVAIL;
+    }
+
   char name2[namlen + 1];
   size_t i;
 
Index: glibc-2.19/nis/nss_nis/nis-service.c
===================================================================
--- glibc-2.19.orig/nis/nss_nis/nis-service.c
+++ glibc-2.19/nis/nss_nis/nis-service.c
@@ -271,6 +271,13 @@ _nss_nis_getservbyname_r (const char *na
   /* If the protocol is given, we could try if our NIS server knows
      about services.byservicename map. If yes, we only need one query.  */
   size_t keylen = strlen (name) + (protocol ? 1 + strlen (protocol) : 0);
+  /* Limit key length to the maximum size of an RPC packet.  */
+  if (keylen > UDPMSGSIZE)
+    {
+      *errnop = ERANGE;
+      return NSS_STATUS_UNAVAIL;
+    }
+
   char key[keylen + 1];
 
   /* key is: "name/proto" */
@@ -355,6 +362,13 @@ _nss_nis_getservbyport_r (int port, cons
      Otherwise try first port/tcp, then port/udp and then fallback
      to sequential scanning of services.byname.  */
   const char *proto = protocol != NULL ? protocol : "tcp";
+  /* Limit protocol name length to the maximum size of an RPC packet.  */
+  if (strlen (proto) > UDPMSGSIZE)
+    {
+      *errnop = ERANGE;
+      return NSS_STATUS_UNAVAIL;
+    }
+
   do
     {
       /* key is: "port/proto" */