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/include/avc.h b/security/selinux/include/avc.h
index 46a940d9af67..ae4c3a0e2c1a 100644
--- a/security/selinux/include/avc.h
+++ b/security/selinux/include/avc.h
@@ -131,6 +131,9 @@ int avc_add_callback(int (*callback)(u32 event, u32 ssid, u32 tsid,
 int avc_get_hash_stats(char *page);
 extern unsigned int avc_cache_threshold;
 
+/* Attempt to free avc node cache */
+void avc_disable(void);
+
 #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS
 DECLARE_PER_CPU(struct avc_cache_stats, avc_cache_stats);
 #endif