linux-kernel - Re: [PATCH v4 1/4] lib: introduce copy_struct_from

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Date:   Tue, 1 Oct 2019 09:28:42 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Christian Brauner <christian.brauner@...ntu.com>
Cc:     Aleksa Sarai <cyphar@...har.com>, Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Al Viro <viro@...iv.linux.org.uk>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        libc-alpha@...rceware.org, linux-api@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 1/4] lib: introduce copy_struct_from_user() helper

On Tue, Oct 01, 2019 at 04:31:27AM +0200, Christian Brauner wrote:
> On Mon, Sep 30, 2019 at 06:58:39PM -0700, Kees Cook wrote:
> > On Tue, Oct 01, 2019 at 11:10:52AM +1000, Aleksa Sarai wrote:
> > > +static __always_inline
> > > +int copy_struct_from_user(void *dst, size_t ksize,
> > > +			  const void __user *src, size_t usize)
> > 
> > And of course I forgot to realize both this and check_zeroed_user()
> > should also have the __must_check attribute. Sorry for forgetting that
> > earlier!
> 
> Just said to Aleksa that I'll just fix this up when I apply so he
> doesn't have to resend. You ok with this, Kees?

Yup; that's totally fine. Thanks!

-- 
Kees Cook