linux-kernel - Re: [PATCHv2 2/2] arch: Rename CONFIG_DEBUG_RODATA and CONFIG_DEBUG_MODULE

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Message-ID: <CAGXu5jKS0_a8Nq+eJN4TN142fxrtEyO7qD9FB8gDCju6PA5xEA@mail.gmail.com>
Date:   Mon, 6 Feb 2017 12:13:38 -0800
From:   Kees Cook <keescook@...omium.org>
To:     Laura Abbott <labbott@...hat.com>
Cc:     Jason Wessel <jason.wessel@...driver.com>,
        Jonathan Corbet <corbet@....net>,
        Russell King <linux@...linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        "James E.J. Bottomley" <jejb@...isc-linux.org>,
        Helge Deller <deller@....de>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        "x86@...nel.org" <x86@...nel.org>, Rob Herring <robh@...nel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
        Mark Rutland <mark.rutland@....com>,
        Jessica Yu <jeyu@...hat.com>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        linux-parisc <linux-parisc@...r.kernel.org>,
        "linux-s390@...r.kernel.org" <linux-s390@...r.kernel.org>,
        Linux PM list <linux-pm@...r.kernel.org>,
        "kernel-hardening@...ts.openwall.com" 
        <kernel-hardening@...ts.openwall.com>,
        Robin Murphy <robin.murphy@....com>
Subject: Re: [PATCHv2 2/2] arch: Rename CONFIG_DEBUG_RODATA and CONFIG_DEBUG_MODULE_RONX

On Mon, Feb 6, 2017 at 10:49 AM, Laura Abbott <labbott@...hat.com> wrote:
> On 02/03/2017 12:03 PM, Kees Cook wrote:
>> On Fri, Feb 3, 2017 at 9:52 AM, Laura Abbott <labbott@...hat.com> wrote:
>>>
>>> Both of these options are poorly named. The features they provide are
>>> necessary for system security and should not be considered debug only.
>>> Change the name to something that accurately describes what these
>>> options do.
>>
>> It may help to explicitly call out the name change from/to in the
>> commit message.
>>
>>>
>>> Signed-off-by: Laura Abbott <labbott@...hat.com>
>>> ---
>>> [...]
>>> diff --git a/arch/arm/configs/aspeed_g4_defconfig b/arch/arm/configs/aspeed_g4_defconfig
>>> index ca39c04..beea2cc 100644
>>> --- a/arch/arm/configs/aspeed_g4_defconfig
>>> +++ b/arch/arm/configs/aspeed_g4_defconfig
>>> @@ -25,7 +25,6 @@ CONFIG_MODULE_UNLOAD=y
>>>  # CONFIG_ARCH_MULTI_V7 is not set
>>>  CONFIG_ARCH_ASPEED=y
>>>  CONFIG_MACH_ASPEED_G4=y
>>> -CONFIG_DEBUG_RODATA=y
>>>  CONFIG_AEABI=y
>>>  CONFIG_UACCESS_WITH_MEMCPY=y
>>>  CONFIG_SECCOMP=y
>>
>> Are these defconfig cases correct (dropping DEBUG_RODATA without
>> adding STRICT_KERNEL_RWX)?
>>
>
> Yes, I think these need to be updated to the new config option since
> these are not CPUv7
>
>
>> Who should carry this series, btw?
>>
>
> An excellent question :)
>
> Would you be willing to carry it with Acks?

Yeah, I can push this via the KSPP tree: it's cross-architecture, so
it seems like this should go either through my tree or through akpm's
tree.

Are the arch maintainers okay with that?

-Kees

-- 
Kees Cook
Pixel Security