linux-kernel - Re: [PATCH 15/46] selinux: One check and function call less in genfs

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Date:   Tue, 17 Jan 2017 09:53:27 -0800
From:   Casey Schaufler <casey@...aufler-ca.com>
To:     SF Markus Elfring <elfring@...rs.sourceforge.net>,
        linux-security-module@...r.kernel.org, selinux@...ho.nsa.gov
Cc:     Eric Paris <eparis@...isplace.org>,
        James Morris <james.l.morris@...cle.com>,
        Paul Moore <paul@...l-moore.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 15/46] selinux: One check and function call less in
 genfs_read() after error detection

On 1/17/2017 8:37 AM, SF Markus Elfring wrote:
>>> @@ -2015,7 +2015,7 @@ static int genfs_read(struct policydb *p, void *fp)
>>>  		newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL);
>>>  		if (!newgenfs) {
>>>  			rc = -ENOMEM;
>>> -			goto out;
>>> +			goto exit;
>>>  		}
>>>  
>>>  		rc = str_read(&newgenfs->fstype, GFP_KERNEL, fp, len);
>>> @@ -2101,7 +2101,7 @@ static int genfs_read(struct policydb *p, void *fp)
>>>  		kfree(newgenfs);
>>>  	}
>>>  	ocontext_destroy(newc, OCON_FSUSE);
>>> -
>>> +exit:
>>>  	return rc;
>> Why not replace the "goto out" with "return rc" rather
>> than add a target?
> Would you accept to use the statement "return -ENOMEM;" there instead?

That would be even better.

>
> Regards,
> Markus
>