Description of problem:
a user can execute suid binaries even when not having exec permission 
for them by calling suid_libia32x.so and passing it a file descriptor 
of the suid binary open for read.

Version-Release number of selected component (if applicable):
suid_libia32x.so : 4602

How reproducible:

Steps to Reproduce:
1. prepare a root owned setuid binary - 'exec_as_root'
2. deny exec rights from a regular user - 'johndoe'
3. prepare a program 'xx' that opens 'exec_as_root' for reading and
   then calls execl ("/usr/lib/ia32el/suid_libia32x.so", 
                      "suid_libia32x.so", fd_str, NULL);
   where fd_str is a string containing the fd of exec_as_root

  
Actual results:
exec_as_root will be executed

Expected results:
permission denied

Additional info: