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Message-ID: <CAHC9VhQWbepC3Ba4zyXKOG5JpY-RA1vFCdMi+J1527HJTX10pA@mail.gmail.com>
Date: Tue, 16 May 2017 14:32:38 -0400
From: Paul Moore <paul@...l-moore.com>
To: SF Markus Elfring <elfring@...rs.sourceforge.net>
Cc: Casey Schaufler <casey@...aufler-ca.com>,
Eric Paris <eparis@...isplace.org>,
James Morris <james.l.morris@...cle.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,
LKML <linux-kernel@...r.kernel.org>,
kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 2/3] selinux: Return an error code only as a constant in sidtab_insert()
On Tue, Apr 4, 2017 at 7:14 AM, SF Markus Elfring
<elfring@...rs.sourceforge.net> wrote:
> 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(-)
Merged.
> 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
>
--
paul moore
www.paul-moore.com
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