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From:   Kees Cook <keescook@chromium.org>
Date:   Thu, 11 Apr 2019 10:00:24 -0700
Message-ID: <CAGXu5jKnMUH_Gavg+6Q4ft98GxYZ49Z=fzUTHhzkfONSCL4ARg@mail.gmail.com>
Subject: Re: [PATCH v3] init: Do not select DEBUG_KERNEL by default
To:     Masahiro Yamada <yamada.masahiro@socionext.com>,
        Andrew Morton <akpm@linux-foundation.org>
Cc:     Sinan Kaya <okaya@kernel.org>, LKML <linux-kernel@vger.kernel.org>,
        Josh Triplett <josh@joshtriplett.org>,
        "Peter Zijlstra (Intel)" <peterz@infradead.org>,
        Johannes Weiner <hannes@cmpxchg.org>,
        Nicholas Piggin <npiggin@gmail.com>,
        Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
        Vasily Gorbik <gor@linux.ibm.com>,
        Adrian Reber <adrian@lisas.de>,
        Richard Guy Briggs <rgb@redhat.com>,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        Petr Mladek <pmladek@suse.com>,
        Joe Lawrence <joe.lawrence@redhat.com>,
        Matthew Wilcox <willy@infradead.org>,
        Randy Dunlap <rdunlap@infradead.org>,
        Mikulas Patocka <mpatocka@redhat.com>,
        Robin Murphy <robin.murphy@arm.com>,
        Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
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On Wed, Apr 10, 2019 at 10:34 PM Masahiro Yamada
<yamada.masahiro@socionext.com> wrote:
>
> On Thu, Apr 11, 2019 at 11:47 AM Kees Cook <keescook@chromium.org> wrote:
> >
> > On Wed, Apr 10, 2019 at 5:56 PM Sinan Kaya <okaya@kernel.org> wrote:
> > >
> > > We can't seem to have a kernel with CONFIG_EXPERT set but
> > > CONFIG_DEBUG_KERNEL unset these days.
> > >
> > > While some of the features under the CONFIG_EXPERT require
> > > CONFIG_DEBUG_KERNEL, it doesn't apply for all features.
> > >
> > > It looks like CONFIG_KALLSYMS_ALL is the only feature that
> > > requires CONFIG_DEBUG_KERNEL.
> > >
> > > Select CONFIG_EXPERT when CONFIG_DEBUG_KERNEL is chosen but
> > > you can still choose CONFIG_EXPERT without CONFIG_DEBUG_KERNEL.
> > >
> > > Signed-off-by: Sinan Kaya <okaya@kernel.org>
> > > Reviewed-by: Kees Cook <keescook@chromium.org>
> >
> > Masahiro, should this go via your tree, or somewhere else?
>
>
> I think somewhere else.

Okay. Andrew, can you take this?

-- 
Kees Cook