if the full message is:
kernel panic – not syncing: Attempted to kill inint !
PId: 1, comm: init not tainted 2.6.32.-279-5.2.e16.x86_64 #1
then you should have disabled selinux and after that you have rebooted the system.
The easier way is to use a live OS and re-enable it
vim /etc/selinux/config
…
SELINUX=enforcing
…
Second choice is to disable selinux in the kernel arguments by adding selinux=0
vim /boot/grub/grub.conf
…
kernel /boot/vmlinuz-2.4.20-selinux-2003040709 ro root=/dev/hda1 nousb selinux=0
…
source kernel panic – not syncing: Attempted to kill inint !
Mount the centos live cd and boot
Go into rescue mode and wait for it load up
Read the terminal to see where it mounted the OS
Go into OS
vim or nano /etc/selinux/config
Make sure SELINUX=enforcing or disabled