linux-kernel - Re: [PATCH] capabilities: fix sparse warning about _

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Message-ID: <ZJL+edmv267MHhdQ@jerom>
Date:   Wed, 21 Jun 2023 08:43:21 -0500
From:   Serge Hallyn <serge@...lyn.com>
To:     Paul Moore <paul@...l-moore.com>
Cc:     Ben Dooks <ben.dooks@...ethink.co.uk>,
        linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] capabilities: fix sparse warning about __user access

On Mon, Jun 19, 2023 at 05:47:54PM -0400, Paul Moore wrote:
> On Mon, Jun 19, 2023 at 1:57 PM Serge E. Hallyn <serge@...lyn.com> wrote:
> >
> > On Mon, Jun 19, 2023 at 01:35:35PM +0100, Ben Dooks wrote:
> > > The two syscalls for capget and capset are producing sparse warnings
> > > as sparse is thinking that the "struct __user_cap_data_struct" is marked
> > > user, which seems to be down to the declaration and typedef at the same
> > > time.
> > >
> > > Fix the following warnings by splutting the struct declaration and then
> > > the user typedef into two:
> >
> > I'm not a fan of making code changes to work around scanners'
> > shortcomings, mainly because eventually I assume the scanners
> > will learn to deal with it.
> >
> > However, I don't like the all-in-one typedef+struct definition
> > either, so let's go with it :)
> >
> > Paul, do you mind picking this up?
> 
> Sure, no problem.  Since we are at -rc7, I'm assuming this can wait
> until after the merge window?

Yeah, it's just fixing a sparse warning, no urgency.

thanks,
-serge