linux-kernel - Re: [PATCH] selinux: Remove unnecessary check of array base in selinux_set

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Message-ID: <CAHC9VhSVqYuuBvyjWmAqgfn9WvFW=VokcLLqsvmKedee3Gjgfw@mail.gmail.com>
Date:   Thu, 23 Mar 2017 08:08:05 -0400
From:   Paul Moore <paul@...l-moore.com>
To:     Grant Grundler <grundler@...omium.org>
Cc:     Matthias Kaehlcke <mka@...omium.org>,
        Stephen Smalley <sds@...ho.nsa.gov>,
        Eric Paris <eparis@...isplace.org>,
        James Morris <james.l.morris@...cle.com>,
        "Serge E . Hallyn" <serge@...lyn.com>, selinux@...ho.nsa.gov,
        linux-security-module@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>,
        Prarit Bhargava <prarit@...hat.com>,
        David Howells <dhowells@...hat.com>,
        Michael Davidson <md@...gle.com>,
        Greg Hackmann <ghackmann@...gle.com>
Subject: Re: [PATCH] selinux: Remove unnecessary check of array base in selinux_set_mapping()

On Wed, Mar 22, 2017 at 8:28 PM, Grant Grundler <grundler@...omium.org> wrote:
> Ping? Any feedback on this patch?

It's on my list of patches to review, patience please.

> On Thu, Mar 16, 2017 at 3:26 PM, Matthias Kaehlcke <mka@...omium.org> wrote:
>>
>> 'perms' will never be NULL since it isn't a plain pointer but an array
>> of u32 values.
>>
>> This fixes the following warning when building with clang:
>>
>> security/selinux/ss/services.c:158:16: error: address of array
>> 'p_in->perms' will always evaluate to 'true'
>> [-Werror,-Wpointer-bool-conversion]
>>                 while (p_in->perms && p_in->perms[k]) {
>>
>> Signed-off-by: Matthias Kaehlcke <mka@...omium.org>
>> ---
>>  security/selinux/ss/services.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/security/selinux/ss/services.c
>> b/security/selinux/ss/services.c
>> index 082b20c78363..2f20b5f974f4 100644
>> --- a/security/selinux/ss/services.c
>> +++ b/security/selinux/ss/services.c
>> @@ -155,7 +155,7 @@ static int selinux_set_mapping(struct policydb *pol,
>>                 }
>>
>>                 k = 0;
>> -               while (p_in->perms && p_in->perms[k]) {
>> +               while (p_in->perms[k]) {
>>                         /* An empty permission string skips ahead */
>>                         if (!*p_in->perms[k]) {
>>                                 k++;
>> --
>> 2.12.0.367.g23dc2f6d3c-goog
>>
>



-- 
paul moore
www.paul-moore.com