Update.

* inet/getnetgrent_r.c (innetgr): We must get the lock used for
	the set/get/end interfaces since we call all these functions in
	succession and must not be interrupted doing this.
	Reported by Chuck Simmons.

inet/getnetgrent_r.c

@@ -344,6 +344,8 @@ innetgr (const char *netgroup, const char *host, const char *user,
   const char *current_group = netgroup;
   int real_entry = 0;
 
+  __libc_lock_lock (lock);
+
   /* Walk through the services until we found an answer or we shall
      not work further.  We can do some optimization here.  Since all
      services must provide the `setnetgrent' function we can do all
@@ -445,6 +447,8 @@ innetgr (const char *netgroup, const char *host, const char *user,
       break;
     }
 
+  __libc_lock_unlock (lock);
+
   /* Free the memory.  */
   while (known != NULL)
     {