linux-kernel - [PATCH V2 3/3] audit: bail before bug check if audit disabled

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Date:   Fri,  9 Feb 2018 21:40:32 -0500
From:   Richard Guy Briggs <rgb@...hat.com>
To:     Linux-Audit Mailing List <linux-audit@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>
Cc:     Paul Moore <paul@...l-moore.com>, Eric Paris <eparis@...hat.com>,
        Steve Grubb <sgrubb@...hat.com>,
        Richard Guy Briggs <rgb@...hat.com>
Subject: [PATCH V2 3/3] audit: bail before bug check if audit disabled

If audit is disabled, who cares if there is a bug indicating syscall in
process or names already recorded.  Bail immediately on audit disabled.

Signed-off-by: Richard Guy Briggs <rgb@...hat.com>
---
 kernel/auditsc.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index bc534bf..4e0a4ac 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -1511,14 +1511,11 @@ void __audit_syscall_entry(int major, unsigned long a1, unsigned long a2,
 	struct audit_context *context = tsk->audit_context;
 	enum audit_state     state;
 
-	if (!context)
+	if (!audit_enabled || !context)
 		return;
 
 	BUG_ON(context->in_syscall || context->name_count);
 
-	if (!audit_enabled)
-		return;
-
 	state = context->state;
 	if (state == AUDIT_DISABLED)
 		return;
-- 
1.8.3.1