linux-kernel - [PATCH 2/7] audit: cull redundancy in audit_rule

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Message-Id: <92746f6d4ad17ce7af82d08f5b18443ca3b0c31b.1412285491.git.rgb@redhat.com>
Date:	Thu,  2 Oct 2014 22:05:19 -0400
From:	Richard Guy Briggs <rgb@...hat.com>
To:	linux-audit@...hat.com, linux-kernel@...r.kernel.org
Cc:	Richard Guy Briggs <rgb@...hat.com>, eparis@...hat.com,
	sgrubb@...hat.com, aviro@...hat.com, pmoore@...hat.com
Subject: [PATCH 2/7] audit: cull redundancy in audit_rule_change

Re-factor audit_rule_change() to reduce the amount of code redundancy and
simplify the logic.

Signed-off-by: Richard Guy Briggs <rgb@...hat.com>
---
 kernel/auditfilter.c |   20 +++++++-------------
 1 files changed, 7 insertions(+), 13 deletions(-)

diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index 4a11697..e3378a4 100644
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -1064,30 +1064,24 @@ int audit_rule_change(int type, __u32 portid, int seq, void *data,
 	int err = 0;
 	struct audit_entry *entry;
 
+	entry = audit_data_to_entry(data, datasz);
+	if (IS_ERR(entry))
+		return PTR_ERR(entry);
+
 	switch (type) {
 	case AUDIT_ADD_RULE:
-		entry = audit_data_to_entry(data, datasz);
-		if (IS_ERR(entry))
-			return PTR_ERR(entry);
-
 		err = audit_add_rule(entry);
 		audit_log_rule_change("add_rule", &entry->rule, !err);
-		if (err)
-			audit_free_rule(entry);
 		break;
 	case AUDIT_DEL_RULE:
-		entry = audit_data_to_entry(data, datasz);
-		if (IS_ERR(entry))
-			return PTR_ERR(entry);
-
 		err = audit_del_rule(entry);
 		audit_log_rule_change("remove_rule", &entry->rule, !err);
-		audit_free_rule(entry);
 		break;
-	default:
-		return -EINVAL;
 	}
 
+	if (err || type == AUDIT_DEL_RULE)
+		audit_free_rule(entry);
+
 	return err;
 }
 
-- 
1.7.1

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