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

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Message-ID: <CANEJEGu5L61TgJ0RUhG+DvLExj7X1FsfKbGOXWCMRRWykkLm2A@mail.gmail.com>
Date:   Thu, 23 Mar 2017 10:34:30 -0700
From:   Grant Grundler <grundler@...omium.org>
To:     Paul Moore <paul@...l-moore.com>
Cc:     Grant Grundler <grundler@...omium.org>,
        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 Thu, Mar 23, 2017 at 5:08 AM, Paul Moore <paul@...l-moore.com> wrote:
> 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.

No problem! Thank you!

just wanted confirmation it wasn't overlooked.

cheers,
grant

>
>> 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