linux-kernel - Re: [PATCH 0/2] Proper ro_after

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Message-Id: <20160607180748.GA4280@osiris>
Date:	Tue, 7 Jun 2016 20:07:48 +0200
From:	Heiko Carstens <heiko.carstens@...ibm.com>
To:	Kees Cook <keescook@...omium.org>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/2] Proper ro_after_init implementation on s390

On Tue, Jun 07, 2016 at 08:49:14AM -0700, Kees Cook wrote:
> > Heiko Carstens (2):
> >   vmlinux.lds.h: allow arch specific handling of ro_after_init data section
> >   s390/mm: add proper __ro_after_init support
> >
> >  arch/s390/include/asm/cache.h     |  3 ---
> >  arch/s390/include/asm/sections.h  |  1 +
> >  arch/s390/kernel/vmlinux.lds.S    | 12 +++++++++++-
> >  arch/s390/mm/init.c               |  7 ++++---
> >  arch/s390/mm/vmem.c               |  7 +++----
> >  include/asm-generic/vmlinux.lds.h | 10 +++++++++-
> >  6 files changed, 28 insertions(+), 12 deletions(-)
> 
> Awesome! This looks great to me! Have you had a chance to look through
> any of the arch/s390/ __init code for variables that should be marked
> __ro_after_init?

Not yet, and actually this I'm a bit reluctant to do that, since any wrong
annotation will lead to kernel crashes sooner or later ;)
However I'll look into this as well.

> Reviewed-by: Kees Cook <keescook@...omium.org>

Thanks! I add that to both patches.

(sorry for the broken threading; one of the outgoing mail servers rewrote
all Message-Id headers)