Kernel panic - not syncing: Attempted to kill init!
Pid: 1,comm: init Tained: G        I-------------    2.6.32-358.el6.x86_64 #1
Call Trace:
 [<fffffff8150cfc8>] ? panic+0xa0/0x16f
 [<fffffff81073ae2>] ? do_exit+0x862/0x870
 [<fffffff81182885>] ? fput+0x25/0x30
 [<fffffff81073b48>] ? do_group_exit+0x58/0xd0
 [<fffffff81073bd7>] ? sys_exit_group+0x17/0x20
 [<fffffff8100b072>] ? system_call_fastpath+0x16/0x1b
panic occurred, switching back to text console

The Solution

This was caused by a typo in /etc/selinux/config

Make sure it is set correctly, for example I had it as so (I put disabled in the wrong spot by accident):

It's amazing how a bad SELinux config can crash your system and cause it not to boot.

Notice below that "SELINUXTYPE=disabled", that's wrong and was the problem.

Bad Config Example (don't use it!):

# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
#     enforcing - SELinux security policy is enforced.
#     permissive - SELinux prints warnings instead of enforcing.
#     disabled - No SELinux policy is loaded.
SELINUX=enforcing
# SELINUXTYPE= can take one of these two values:
#     targeted - Targeted processes are protected,
#     mls - Multi Level Security protection.
SELINUXTYPE=disabled

Good Config Example (use it because selinux causes issues):

# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
#     enforcing - SELinux security policy is enforced.
#     permissive - SELinux prints warnings instead of enforcing.
#     disabled - No SELinux policy is loaded.
SELINUX=disabled
# SELINUXTYPE= can take one of these two values:
#     targeted - Targeted processes are protected,
#     mls - Multi Level Security protection.
SELINUXTYPE=targeted


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