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Date: Tue, 4 Apr 2017 13:14:32 +0200
From: SF Markus Elfring <elfring@...rs.sourceforge.net>
To: Casey Schaufler <casey@...aufler-ca.com>,
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>,
linux-security-module@...r.kernel.org, selinux@...ho.nsa.gov
Cc: LKML <linux-kernel@...r.kernel.org>,
kernel-janitors@...r.kernel.org
Subject: [PATCH 2/3] selinux: Return an error code only as a constant in
sidtab_insert()
From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Tue, 4 Apr 2017 11:33:53 +0200
* Return an error code without storing it in an intermediate variable.
* Delete the local variable "rc" and the jump label "out" which became
unnecessary with this refactoring.
Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
security/selinux/ss/sidtab.c | 27 ++++++++++-----------------
1 file changed, 10 insertions(+), 17 deletions(-)
diff --git a/security/selinux/ss/sidtab.c b/security/selinux/ss/sidtab.c
index f6915f257486..c5f436b15d19 100644
--- a/security/selinux/ss/sidtab.c
+++ b/security/selinux/ss/sidtab.c
@@ -32,13 +32,11 @@ int sidtab_init(struct sidtab *s)
int sidtab_insert(struct sidtab *s, u32 sid, struct context *context)
{
- int hvalue, rc = 0;
+ int hvalue;
struct sidtab_node *prev, *cur, *newnode;
- if (!s) {
- rc = -ENOMEM;
- goto out;
- }
+ if (!s)
+ return -ENOMEM;
hvalue = SIDTAB_HASH(sid);
prev = NULL;
@@ -48,21 +46,17 @@ int sidtab_insert(struct sidtab *s, u32 sid, struct context *context)
cur = cur->next;
}
- if (cur && sid == cur->sid) {
- rc = -EEXIST;
- goto out;
- }
+ if (cur && sid == cur->sid)
+ return -EEXIST;
newnode = kmalloc(sizeof(*newnode), GFP_ATOMIC);
- if (!newnode) {
- rc = -ENOMEM;
- goto out;
- }
+ if (!newnode)
+ return -ENOMEM;
+
newnode->sid = sid;
if (context_cpy(&newnode->context, context)) {
kfree(newnode);
- rc = -ENOMEM;
- goto out;
+ return -ENOMEM;
}
if (prev) {
@@ -78,8 +72,7 @@ int sidtab_insert(struct sidtab *s, u32 sid, struct context *context)
s->nel++;
if (sid >= s->next_sid)
s->next_sid = sid + 1;
-out:
- return rc;
+ return 0;
}
static struct context *sidtab_search_core(struct sidtab *s, u32 sid, int force)
--
2.12.2
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