summaryrefslogtreecommitdiffstats
path: root/security/selinux/avc.c
diff options
context:
space:
mode:
Diffstat (limited to 'security/selinux/avc.c')
-rw-r--r--security/selinux/avc.c25
1 files changed, 22 insertions, 3 deletions
diff --git a/security/selinux/avc.c b/security/selinux/avc.c
index 7f1a304712a9..9da6420e2056 100644
--- a/security/selinux/avc.c
+++ b/security/selinux/avc.c
@@ -288,7 +288,6 @@ static struct avc_node *avc_alloc_node(void)
if (!node)
goto out;
- INIT_RCU_HEAD(&node->rhead);
INIT_HLIST_NODE(&node->list);
avc_cache_stats_incr(allocations);
@@ -489,9 +488,29 @@ void avc_audit(u32 ssid, u32 tsid,
struct common_audit_data stack_data;
u32 denied, audited;
denied = requested & ~avd->allowed;
- if (denied)
+ if (denied) {
audited = denied & avd->auditdeny;
- else if (result)
+ /*
+ * a->selinux_audit_data.auditdeny is TRICKY! Setting a bit in
+ * this field means that ANY denials should NOT be audited if
+ * the policy contains an explicit dontaudit rule for that
+ * permission. Take notice that this is unrelated to the
+ * actual permissions that were denied. As an example lets
+ * assume:
+ *
+ * denied == READ
+ * avd.auditdeny & ACCESS == 0 (not set means explicit rule)
+ * selinux_audit_data.auditdeny & ACCESS == 1
+ *
+ * We will NOT audit the denial even though the denied
+ * permission was READ and the auditdeny checks were for
+ * ACCESS
+ */
+ if (a &&
+ a->selinux_audit_data.auditdeny &&
+ !(a->selinux_audit_data.auditdeny & avd->auditdeny))
+ audited = 0;
+ } else if (result)
audited = denied = requested;
else
audited = requested & avd->auditallow;