kernel security update

2.4.21-47.0.1.EL - fix buflen assignment for DVD BDA read requests Chip Coldwell - prevent write permission w/read-only shm segments Ernie Petrides - fix clock drift by disabling C1 clock ramping on AMD Prarit Bhargava - prevent possible deadlock with shmat/shm-rmid races Sachin Prabhu - prevent...