linux-hardening - Re: [PATCH v2 55/63] HID: roccat: Use struct_group() to zero kone_mouse

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Message-ID: <nycvar.YFH.7.76.2108201725360.15313@cbobk.fhfr.pm>
Date:   Fri, 20 Aug 2021 17:27:35 +0200 (CEST)
From:   Jiri Kosina <jikos@...nel.org>
To:     Kees Cook <keescook@...omium.org>
cc:     LKML <linux-kernel@...r.kernel.org>,
        Stefan Achatz <erazor_de@...rs.sourceforge.net>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        linux-input <linux-input@...r.kernel.org>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-wireless <linux-wireless@...r.kernel.org>,
        Network Development <netdev@...r.kernel.org>,
        Maling list - DRI developers 
        <dri-devel@...ts.freedesktop.org>, linux-staging@...ts.linux.dev,
        linux-block <linux-block@...r.kernel.org>,
        linux-kbuild <linux-kbuild@...r.kernel.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        linux-hardening@...r.kernel.org
Subject: Re: [PATCH v2 55/63] HID: roccat: Use struct_group() to zero
 kone_mouse_event

On Fri, 20 Aug 2021, Kees Cook wrote:

> > > In preparation for FORTIFY_SOURCE performing compile-time and run-time
> > > field bounds checking for memset(), avoid intentionally writing across
> > > neighboring fields.
> > >
> > > Add struct_group() to mark region of struct kone_mouse_event that should
> > > be initialized to zero.
> > >
> > > Cc: Stefan Achatz <erazor_de@...rs.sourceforge.net>
> > > Cc: Jiri Kosina <jikos@...nel.org>
> > > Cc: Benjamin Tissoires <benjamin.tissoires@...hat.com>
> > > Cc: linux-input@...r.kernel.org
> > > Signed-off-by: Kees Cook <keescook@...omium.org>
> >
> > Applied, thank you Kees.
> >
> 
> Eek! No, this will break the build: struct_group() is not yet in the tree.
> I can carry this with an Ack, etc.

I was pretty sure I saw struct_group() already in linux-next, but that was 
apparently a vacation-induced brainfart, sorry. Dropping.

-- 
Jiri Kosina
SUSE Labs