selinux: clean up avc node cache when disabling selinux

Added a call to free the avc_node_cache when inside selinux_disable because
it should not waste resources allocated during avc_init if SELinux is disabled
and the cache will never be used.

Signed-off-by: Thomas Liu <tliu@redhat.com>
Acked-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index e3b4f3083dd7..2081055f6783 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -5683,6 +5683,9 @@ int selinux_disable(void)
         selinux_disabled = 1;
         selinux_enabled = 0;
 
+        /* Try to destroy the avc node cache */
+        avc_disable();
+
         /* Reset security_ops to the secondary module, dummy or capability. */
         security_ops = secondary_ops;