audit: make ANOM_LINK obey audit_enabled and audit_dummy_context

Audit link denied events emit disjointed records when audit is disabled.
No records should be emitted when audit is disabled.

See: https://github.com/linux-audit/audit-kernel/issues/21

Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/kernel/audit.c b/kernel/audit.c
index 69ef8de69f03..46cd8f66af17 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -2315,6 +2315,9 @@ void audit_log_link_denied(const char *operation, const struct path *link)
         struct audit_buffer *ab;
         struct audit_names *name;
 
+        if (!audit_enabled || audit_dummy_context())
+                return;
+
         name = kzalloc(sizeof(*name), GFP_NOFS);
         if (!name)
                 return;