From 89b223bfb8a89731bea4c84982b5d2ad7ba460e3 Mon Sep 17 00:00:00 2001 From: Paul Moore Date: Wed, 18 Dec 2019 21:45:08 -0500 Subject: selinux: deprecate disabling SELinux and runtime Deprecate the CONFIG_SECURITY_SELINUX_DISABLE functionality. The code was originally developed to make it easier for Linux distributions to support architectures where adding parameters to the kernel command line was difficult. Unfortunately, supporting runtime disable meant we had to make some security trade-offs when it came to the LSM hooks, as documented in the Kconfig help text: NOTE: selecting this option will disable the '__ro_after_init' kernel hardening feature for security hooks. Please consider using the selinux=0 boot parameter instead of enabling this option. Fortunately it looks as if that the original motivation for the runtime disable functionality is gone, and Fedora/RHEL appears to be the only major distribution enabling this capability at build time so we are now taking steps to remove it entirely from the kernel. The first step is to mark the functionality as deprecated and print an error when it is used (what this patch is doing). As Fedora/RHEL makes progress in transitioning the distribution away from runtime disable, we will introduce follow-up patches over several kernel releases which will block for increasing periods of time when the runtime disable is used. Finally we will remove the option entirely once we believe all users have moved to the kernel cmdline approach. Acked-by: Casey Schaufler Acked-by: Ondrej Mosnacek Acked-by: Stephen Smalley Signed-off-by: Paul Moore --- MAINTAINERS | 1 + 1 file changed, 1 insertion(+) (limited to 'MAINTAINERS') diff --git a/MAINTAINERS b/MAINTAINERS index bd5847e802de..9dc5767861b5 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -14806,6 +14806,7 @@ F: include/uapi/linux/selinux_netlink.h F: security/selinux/ F: scripts/selinux/ F: Documentation/admin-guide/LSM/SELinux.rst +F: Documentation/ABI/obsolete/sysfs-selinux-disable SENSABLE PHANTOM M: Jiri Slaby -- cgit v1.2.3