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Date: Wed, 29 Mar 2017 11:43:23 -0400 From: Paul Moore <paul@...l-moore.com> To: SF Markus Elfring <elfring@...rs.sourceforge.net> Cc: linux-security-module@...r.kernel.org, selinux@...ho.nsa.gov, 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>, LKML <linux-kernel@...r.kernel.org>, kernel-janitors@...r.kernel.org Subject: Re: [PATCH 42/46] selinux: One function call less in roles_init() after error detection On Sun, Jan 15, 2017 at 10:42 AM, SF Markus Elfring <elfring@...rs.sourceforge.net> wrote: > From: Markus Elfring <elfring@...rs.sourceforge.net> > Date: Sun, 15 Jan 2017 12:56:54 +0100 > > The kfree() function was called in up to two cases by the > roles_init() function during error handling even if the passed variable > contained a null pointer. > > * Adjust a jump target according to the Linux coding style convention. > > * Delete an initialisation for the variable "key" at the beginning > which became unnecessary with this refactoring. > > Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net> > --- > security/selinux/ss/policydb.c | 7 ++++--- > 1 file changed, 4 insertions(+), 3 deletions(-) Dropped due to unnecessary code churn with no significant advantage. > diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c > index be445abf047b..7dd5c6f7786f 100644 > --- a/security/selinux/ss/policydb.c > +++ b/security/selinux/ss/policydb.c > @@ -174,7 +174,7 @@ static struct policydb_compat_info *policydb_lookup_compat(int version) > */ > static int roles_init(struct policydb *p) > { > - char *key = NULL; > + char *key; > int rc; > struct role_datum *role; > > @@ -185,13 +185,13 @@ static int roles_init(struct policydb *p) > role->value = ++p->p_roles.nprim; > if (role->value != OBJECT_R_VAL) { > rc = -EINVAL; > - goto out; > + goto free_role; > } > > key = kstrdup(OBJECT_R, GFP_KERNEL); > if (!key) { > rc = -ENOMEM; > - goto out; > + goto free_role; > } > > rc = hashtab_insert(p->p_roles.table, key, role); > @@ -201,6 +201,7 @@ static int roles_init(struct policydb *p) > return 0; > out: > kfree(key); > +free_role: > kfree(role); > return rc; > } > -- > 2.11.0 > -- paul moore www.paul-moore.com
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