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Description of problem:
We should set checkreqprot to 0 at boot to help prevent bypassing SELinux memory protections.  From the kernel Kconfig documentation:

  "This option sets the default value for the 'checkreqprot' flag
   that determines whether SELinux checks the protection requested
   by the application or the protection that will be applied by the
   kernel (including any implied execute for read-implies-exec) for
   mmap and mprotect calls.  If this option is set to 0 (zero),
   SELinux will default to checking the protection that will be applied
   by the kernel.  If this option is set to 1 (one), SELinux will
   default to checking the protection requested by the application."

Additional info:
This change is already present in Fedora.

Related RHEL7 BZ #1264968

Which package version has the fix?

I checked the 3.7.19-281.el6 build, but it doesn't contain the fix.

I'm going to reopen this BZ so we can clear this up; Miroslav, feel free to close this once you've provided the "Fixed in Version" information.

Ok I meant RHEL7.

The solution for this would have to be in the spec file like Mirek noted in #c7
I will have to do more testing.

The way this is set, through patching /etc/rc.local and adding

echo 0 > /selinux/checkreqprot

is really odd.  Is it a good idea to do it this way?

Due to failing of rhbz#1388037 reverting this fix and CLOSING as WONTFIX.