linux-kernel - [RFC PATCH ghak21 1/4] audit: make ANOM_LINK obey audit_enabled and audit_dummy

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Date:   Wed, 14 Feb 2018 11:18:21 -0500
From:   Richard Guy Briggs <rgb@...hat.com>
To:     Linux-Audit Mailing List <linux-audit@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>
Cc:     Eric Paris <eparis@...hat.com>, Paul Moore <paul@...l-moore.com>,
        Steve Grubb <sgrubb@...hat.com>,
        Kees Cook <keescook@...omium.org>,
        Richard Guy Briggs <rgb@...hat.com>
Subject: [RFC PATCH ghak21 1/4] 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@...hat.com>
---
 kernel/audit.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/audit.c b/kernel/audit.c
index 227db99..4c3fd24 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -2261,6 +2261,9 @@ 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;
-- 
1.8.3.1