linux-kernel - [PATCH 21/46] selinux: Two function calls less in range

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Date:   Sun, 15 Jan 2017 16:21:15 +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 21/46] selinux: Two function calls less in range_read() after
 error detection

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Sat, 14 Jan 2017 20:20:15 +0100

Adjust a jump target to avoid two calls of the function "kfree" at the end
after a memory allocation failed for the local variable "rt".

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 security/selinux/ss/policydb.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c
index 4cd96ce51322..0d2f64558c0a 100644
--- a/security/selinux/ss/policydb.c
+++ b/security/selinux/ss/policydb.c
@@ -1857,7 +1857,7 @@ static int range_read(struct policydb *p, void *fp)
 		rt = kzalloc(sizeof(*rt), GFP_KERNEL);
 		if (!rt) {
 			rc = -ENOMEM;
-			goto out;
+			goto exit;
 		}
 
 		rc = next_entry(buf, fp, (sizeof(u32) * 2));
@@ -1909,6 +1909,7 @@ static int range_read(struct policydb *p, void *fp)
 out:
 	kfree(rt);
 	kfree(r);
+exit:
 	return rc;
 }
 
-- 
2.11.0