linux-kernel - Re: [PATCH] security: declare member holding string literal const

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Message-ID: <CAHC9VhRqh1oB_9Bhh37fbS=fszzjk8B=T2fHkjnrVUjp=pnvpw@mail.gmail.com>
Date:   Fri, 13 May 2022 14:55:06 -0400
From:   Paul Moore <paul@...l-moore.com>
To:     Christian Göttsche <cgzones@...glemail.com>
Cc:     Casey Schaufler <casey@...aufler-ca.com>,
        SElinux list <selinux@...r.kernel.org>,
        James Morris <jmorris@...ei.org>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Xin Long <lucien.xin@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Ondrej Mosnacek <omosnace@...hat.com>,
        Mickaël Salaün <mic@...ux.microsoft.com>,
        Todd Kjos <tkjos@...gle.com>,
        Olga Kornievskaia <kolga@...app.com>,
        Linux kernel mailing list <linux-kernel@...r.kernel.org>,
        linux-security-module@...r.kernel.org, llvm@...ts.linux.dev
Subject: Re: [PATCH] security: declare member holding string literal const

On Fri, May 13, 2022 at 1:16 PM Christian Göttsche
<cgzones@...glemail.com> wrote:
> On Tue, 3 May 2022 at 22:02, Paul Moore <paul@...l-moore.com> wrote:
> > On Mon, May 2, 2022 at 9:38 AM Christian Göttsche
> > <cgzones@...glemail.com> wrote:
> > > On Thu, 17 Feb 2022 at 23:50, Casey Schaufler <casey@...aufler-ca.com> wrote:
> > > > On 2/17/2022 6:18 AM, Christian Göttsche wrote:
> > > > > The struct security_hook_list member lsm is assigned in
> > > > > security_add_hooks() with string literals passed from the individual
> > > > > security modules.  Declare the function parameter and the struct member
> > > > > const to signal their immutability.
> > > > >
> > > > > Reported by Clang [-Wwrite-strings]:
> > > > >
> > > > >      security/selinux/hooks.c:7388:63: error: passing 'const char [8]' to parameter of type 'char *' discards qualifiers [-Werror,-Wincompatible-pointer-types-discards-qualifiers]
> > > > >              security_add_hooks(selinux_hooks, ARRAY_SIZE(selinux_hooks), selinux);
> > > > >                                                                           ^~~~~~~~~
> > > > >      ./include/linux/lsm_hooks.h:1629:11: note: passing argument to parameter 'lsm' here
> > > > >                                      char *lsm);
> > > > >                                            ^
> > > > >
> > > > > Signed-off-by: Christian Göttsche <cgzones@...glemail.com>
> > > >
> > > > Reviewed-by: Casey Schaufler <casey@...aufler-ca.com>
> > > >
> > >
> > > Kindly ping;
> > > any progress on this one?
> >
> > I've already added my Reviewed-by tag, as has Casey, so I think it's
> > pretty "safe" at this point.  The next step is for James to pull this
> > into the LSM tree.  If it is still collecting dust at the end of this
> > week, ping us again and I can just go ahead and pull it into the
> > SELinux tree, it's small enough that it shouldn't cause any problems.
>
> end-of-the-week-ping

Thanks for the reminder.  I haven't seen any other action on this so
I've gone ahead and merged this into selinux/next; thanks for your
patience and persistence on this Christian!

-- 
paul-moore.com