On Sun, Oct 14, 2018 at 06:14:53PM +0300, Lev Olshvang wrote:

    I know that LSM stacking was introduced in kernel version 4.2   I need to backport this to 3.18

Ick, no, you really do not want to do that. Seriously, just use a newer kernel version. Or go force who ever is making you use that kernel version do it for you, as you are paying them for that support. good luck, greg k-h