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Message-ID: <546BB427.2050101@users.sourceforge.net>
Date:	Tue, 18 Nov 2014 22:03:35 +0100
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	David Howells <dhowells@...hat.com>,
	James Morris <james.l.morris@...cle.com>,
	"Serge E. Hallyn" <serge@...lyn.com>, keyrings@...ux-nfs.org,
	linux-security-module@...r.kernel.org
CC:	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org, Coccinelle <cocci@...teme.lip6.fr>
Subject: [PATCH 1/1] keys: Deletion of an unnecessary check before the function
 call "key_put"

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Tue, 18 Nov 2014 21:57:14 +0100

The key_put() function tests whether its argument is NULL and then
returns immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 security/keys/process_keys.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/security/keys/process_keys.c b/security/keys/process_keys.c
index 0cf8a13..ce00e11 100644
--- a/security/keys/process_keys.c
+++ b/security/keys/process_keys.c
@@ -242,8 +242,7 @@ int install_session_keyring_to_cred(struct cred *cred, struct key *keyring)
 	old = cred->session_keyring;
 	rcu_assign_pointer(cred->session_keyring, keyring);
 
-	if (old)
-		key_put(old);
+	key_put(old);
 
 	return 0;
 }
-- 
2.1.3

--
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