linux-kernel - Re: selinux: Use an other error code for an input validation failure in sidtab

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Date:   Tue, 16 May 2017 21:57:36 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     Paul Moore <paul@...l-moore.com>
Cc:     Casey Schaufler <casey@...aufler-ca.com>,
        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>,
        linux-security-module@...r.kernel.org, selinux@...ho.nsa.gov,
        LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: Re: selinux: Use an other error code for an input validation failure
 in sidtab_insert()

> Have you tested this to determine any impact it may have on the
> SELinux userspace?

Not yet.


> I would agree that EINVAL is probably more appropriate in this case,

Thanks that a part of your view seems to fit also to mine.


> but changing this return code has very little value

I would appreciate if this aspect can clarified a bit more.


> and may disrupt userspace if it assumes EINVAL means something else
> when the policy load fails.

Would you find an other error code better there?

Do you care to distinguish an input validation failure in a specific
function implementation from other error situations?

Regards,
Markus