linux-kernel - [PATCH 41/46] selinux: Move two assignments for the variable "rc" in roles

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Message-ID: <aa7a9b62-1016-2e22-6104-d992d6b556bf@users.sourceforge.net>
Date:   Sun, 15 Jan 2017 16:41:25 +0100
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     linux-security-module@...r.kernel.org, selinux@...ho.nsa.gov,
        Eric Paris <eparis@...isplace.org>,
        James Morris <james.l.morris@...cle.com>,
        Paul Moore <paul@...l-moore.com>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        Stephen Smalley <sds@...ho.nsa.gov>,
        William Roberts <william.c.roberts@...el.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH 41/46] selinux: Move two assignments for the variable "rc" in
 roles_init()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Sun, 15 Jan 2017 12:40:35 +0100

One local variable was set to an error code in two cases before
a concrete error situation was detected. Thus move the corresponding
assignments into if branches to indicate a software failure there.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 security/selinux/ss/policydb.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c
index ccc146bfd4c2..be445abf047b 100644
--- a/security/selinux/ss/policydb.c
+++ b/security/selinux/ss/policydb.c
@@ -182,15 +182,17 @@ static int roles_init(struct policydb *p)
 	if (!role)
 		return -ENOMEM;
 
-	rc = -EINVAL;
 	role->value = ++p->p_roles.nprim;
-	if (role->value != OBJECT_R_VAL)
+	if (role->value != OBJECT_R_VAL) {
+		rc = -EINVAL;
 		goto out;
+	}
 
-	rc = -ENOMEM;
 	key = kstrdup(OBJECT_R, GFP_KERNEL);
-	if (!key)
+	if (!key) {
+		rc = -ENOMEM;
 		goto out;
+	}
 
 	rc = hashtab_insert(p->p_roles.table, key, role);
 	if (rc)
-- 
2.11.0