linux-kernel - Re: [PATCH 23/46] selinux: Move an assignment for a pointer in range

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Date:   Thu, 23 Mar 2017 18:18:48 -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 23/46] selinux: Move an assignment for a pointer in range_read()

On Sun, Jan 15, 2017 at 10:23 AM, SF Markus Elfring
<elfring@...rs.sourceforge.net> wrote:
> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Sat, 14 Jan 2017 21:00:45 +0100
>
> Move the assignment for the local variable "r" behind a call of the
> function "next_entry" at the beginning so that it will only be set
> after a successful call.
>
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
> ---
>  security/selinux/ss/policydb.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)

See previous comments.

> diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c
> index 6121a26ada64..5101592ae172 100644
> --- a/security/selinux/ss/policydb.c
> +++ b/security/selinux/ss/policydb.c
> @@ -1840,7 +1840,7 @@ u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name)
>  static int range_read(struct policydb *p, void *fp)
>  {
>         struct range_trans *rt;
> -       struct mls_range *r = NULL;
> +       struct mls_range *r;
>         int i, rc;
>         __le32 buf[2];
>         u32 nel;
> @@ -1852,6 +1852,7 @@ static int range_read(struct policydb *p, void *fp)
>         if (rc)
>                 return rc;
>
> +       r = NULL;
>         nel = le32_to_cpu(buf[0]);
>         for (i = 0; i < nel; i++) {
>                 rt = kzalloc(sizeof(*rt), GFP_KERNEL);
> --
> 2.11.0
>



-- 
paul moore
www.paul-moore.com