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Message-ID: <CAGXu5jL8XDYE+B=a_TBM2K8F-c3f4Jz6zcm3ggacbPNN2wCtpg@mail.gmail.com>
Date: Mon, 2 Jul 2018 11:43:40 -0700
From: Kees Cook <keescook@...omium.org>
To: Chris von Recklinghausen <crecklin@...hat.com>
Cc: Laura Abbott <labbott@...hat.com>, Paolo Abeni <pabeni@...hat.com>,
LKML <linux-kernel@...r.kernel.org>, Linux-MM <linux-mm@...ck.org>,
Kernel Hardening <kernel-hardening@...ts.openwall.com>, Josh Poimboeuf <jpoimboe@...hat.com>,
Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH v3] add param that allows bootline control of hardened usercopy
On Sat, Jun 30, 2018 at 1:43 PM, Christoph von Recklinghausen
<crecklin@...hat.com> wrote:
> The last issue I'm chasing is build failures on ARCH=m68k. The error is
> atomic_read and friends needed by the jump label code not being found.
> The config has CONFIG_BROKEN_ON_SMP=y, so the jump label calls I added
> will only be made #ifndef CONFIG_BROKEN_ON_SMP. Do you think that's
> worth a mention in the blurb that's added to
> Documentation/admin-guide/kernel-parameters.txt?
Uhm, that's weird -- I think the configs on m68k need fixing then? I
don't want to have to sprinkle that ifdef in generic code.
How are other users of static keys and jump labels dealing with m68k weirdness?
-Kees
--
Kees Cook
Pixel Security
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