linux-kernel - [PATCH 44/46] selinux: Adjust two checks for null pointers

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Sun, 15 Jan 2017 16:44:04 +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 44/46] selinux: Adjust two checks for null pointers

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Sun, 15 Jan 2017 13:30:20 +0100
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The script "checkpatch.pl" pointed information out like the following.

Comparison to NULL could be written !…

Thus fix affected source code places.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 security/selinux/ss/sidtab.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/security/selinux/ss/sidtab.c b/security/selinux/ss/sidtab.c
index c9533b21942b..f6915f257486 100644
--- a/security/selinux/ss/sidtab.c
+++ b/security/selinux/ss/sidtab.c
@@ -54,7 +54,7 @@ int sidtab_insert(struct sidtab *s, u32 sid, struct context *context)
 	}
 
 	newnode = kmalloc(sizeof(*newnode), GFP_ATOMIC);
-	if (newnode == NULL) {
+	if (!newnode) {
 		rc = -ENOMEM;
 		goto out;
 	}
@@ -98,7 +98,7 @@ static struct context *sidtab_search_core(struct sidtab *s, u32 sid, int force)
 	if (force && cur && sid == cur->sid && cur->context.len)
 		return &cur->context;
 
-	if (cur == NULL || sid != cur->sid || cur->context.len) {
+	if (!cur || sid != cur->sid || cur->context.len) {
 		/* Remap invalid SIDs to the unlabeled SID. */
 		sid = SECINITSID_UNLABELED;
 		hvalue = SIDTAB_HASH(sid);
-- 
2.11.0