linux-kernel - Re: [kernel-hardening] Re: [PATCH] random: silence compiler warnings and fix race

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Message-ID: <CAHmME9qNSUFr+NsmzELJM49pkHUnuZpRFhW4v5N7XcVn0c06rw@mail.gmail.com>
Date:   Tue, 20 Jun 2017 22:09:06 +0200
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     Sandy Harris <sandyinchina@...il.com>,
        Jeffrey Walton <noloader@...il.com>,
        "Theodore Ts'o" <tytso@....edu>, tglx@...akpoint.cc,
        David Miller <davem@...emloft.net>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Eric Biggers <ebiggers3@...il.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "kernel-hardening@...ts.openwall.com" 
        <kernel-hardening@...ts.openwall.com>,
        Linux Crypto Mailing List <linux-crypto@...r.kernel.org>,
        Michael Ellerman <mpe@...erman.id.au>
Subject: Re: [kernel-hardening] Re: [PATCH] random: silence compiler warnings
 and fix race

On Tue, Jun 20, 2017 at 8:14 PM, Kees Cook <keescook@...omium.org> wrote:
> How about doing this:
>
>    default DEBUG_KERNEL
>
> Most distro kernel select DEBUG_KERNEL because it unhides a bunch of
> other useful configs. Since it doesn't strictly _depend_ on
> DEBUG_KERNEL, I think it's probably a mistake to enforce a false
> dependency. Using it as a hint for the default seems maybe like a good
> middle ground. (And if people can't agree on that, then I guess
> "default n"...)

I didn't know you could do that with Kconfig. Great idea. I'll make
this change and submit a new patch to Ted.

Jason