linux-kernel - Re: [PATCH v4 0/4] Introduce the initify gcc plugin

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Message-ID: <CAGXu5jK0Twn62qiKe1Z2aeSBr_XiYJwn=W3csQvFMaEiyLq7ow@mail.gmail.com>
Date:   Wed, 18 Jan 2017 17:22:18 -0800
From:   Kees Cook <keescook@...omium.org>
To:     Emese Revfy <re.emese@...il.com>
Cc:     "kernel-hardening@...ts.openwall.com" 
        <kernel-hardening@...ts.openwall.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Josh Triplett <josh@...htriplett.org>,
        PaX Team <pageexec@...email.hu>,
        Brad Spengler <spender@...ecurity.net>,
        Michal Marek <mmarek@...e.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        linux-kbuild <linux-kbuild@...r.kernel.org>, minipli@...linux.so,
        Russell King <linux@...linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        David Brown <david.brown@...aro.org>,
        "benh@...nel.crashing.org" <benh@...nel.crashing.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Jeff Layton <jlayton@...chiereds.net>,
        Sam Ravnborg <sam@...nborg.org>
Subject: Re: [PATCH v4 0/4] Introduce the initify gcc plugin

On Tue, Jan 17, 2017 at 12:31 PM, Emese Revfy <re.emese@...il.com> wrote:
> On Thu, 12 Jan 2017 15:40:41 -0800
> Kees Cook <keescook@...omium.org> wrote:
>
>> WARNING: drivers/clk/bcm/built-in.o(.text+0xec2): Section mismatch in
>> reference from the function clk_gate() to the variable
>> .init.rodata.str:__func__.29708
>> The function clk_gate() references
>> the variable __initconst __func__.29708.
>> This is often because clk_gate lacks a __initconst
>> annotation or the annotation of __func__.29708 is wrong.
>>
>> I used my initify v5 development tree, with the following patch, with
>> "make allyesconfig":
>>
>> http://git.kernel.org/cgit/linux/kernel/git/kees/linux.git/log/?h=for-next/gcc-plugin/initify
>
> Hi,
>
> I can't reproduce this mismatch with allyesconfig. Could you please send me your .config?

Sure, attached. (Though note this requires the patch from my earlier
email to allow allyesconfig to work with the plugins.)

-Kees

-- 
Kees Cook
Nexus Security

Download attachment ".config.gz" of type "application/gzip" (57197 bytes)