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authorThomas Liu <tliu@redhat.com>2009-06-24 17:58:05 -0400
committerJames Morris <jmorris@namei.org>2009-06-25 08:29:16 +1000
commit89c86576ecde504da1eeb4f4882b2189ac2f9c4a (patch)
tree94674a48becd9cfde298e9fe6b58db8da28fe238 /security/selinux
parenta893a84e8799270fbec5c3708d001650aab47138 (diff)
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>
Diffstat (limited to 'security/selinux')
-rw-r--r--security/selinux/avc.c6
-rw-r--r--security/selinux/hooks.c3
-rw-r--r--security/selinux/include/avc.h3
3 files changed, 12 insertions, 0 deletions
diff --git a/security/selinux/avc.c b/security/selinux/avc.c
index 7823e84dbe8..236aaa2ea86 100644
--- a/security/selinux/avc.c
+++ b/security/selinux/avc.c
@@ -970,3 +970,9 @@ u32 avc_policy_seqno(void)
{
return avc_cache.latest_notif;
}
+
+void avc_disable(void)
+{
+ if (avc_node_cachep)
+ kmem_cache_destroy(avc_node_cachep);
+}
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index e3b4f3083dd..2081055f678 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;
diff --git a/security/selinux/include/avc.h b/security/selinux/include/avc.h
index 46a940d9af6..ae4c3a0e2c1 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