• James Morris's avatar
    [SECMARK]: Add new packet controls to SELinux · 4e5ab4cb
    James Morris authored
    Add new per-packet access controls to SELinux, replacing the old
    packet controls.
    
    Packets are labeled with the iptables SECMARK and CONNSECMARK targets,
    then security policy for the packets is enforced with these controls.
    
    To allow for a smooth transition to the new controls, the old code is
    still present, but not active by default.  To restore previous
    behavior, the old controls may be activated at runtime by writing a
    '1' to /selinux/compat_net, and also via the kernel boot parameter
    selinux_compat_net.  Switching between the network control models
    requires the security load_policy permission.  The old controls will
    probably eventually be removed and any continued use is discouraged.
    
    With this patch, the new secmark controls for SElinux are disabled by
    default, so existing behavior is entirely preserved, and the user is
    not affected at all.
    
    It also provides a config option to enable the secmark controls by
    default (which can always be overridden at boot and runtime).  It is
    also noted in the kconfig help that the user will need updated
    userspace if enabling secmark controls for SELinux and that they'll
    probably need the SECMARK and CONNMARK targets, and conntrack protocol
    helpers, although such decisions are beyond the scope of kernel
    configuration.
    Signed-off-by: default avatarJames Morris <jmorris@namei.org>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    4e5ab4cb
kernel-parameters.txt 48.9 KB