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

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Message-ID: <CAGXu5jKiDUsncxEOCta3fEgh0OQ0oqpi3gzkPWvpu2oPLq2g4g@mail.gmail.com>
Date:   Tue, 3 Jan 2017 16:23:03 -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 Mon, Dec 19, 2016 at 3:10 AM, Emese Revfy <re.emese@...il.com> wrote:
> On Fri, 16 Dec 2016 14:19:10 -0800
> Kees Cook <keescook@...omium.org> wrote:
>
>> FWIW, it still seems to me that these aren't false positives:
>>
>> WARNING: vmlinux.o(.text.unlikely+0x1b1): Section mismatch in
>> reference from the function uncore_pci_exit.part.22() to the function
>> .init.text:uncore_free_pcibus_map()
>> The function uncore_pci_exit.part.22() references
>> the function __init uncore_free_pcibus_map().
>> This is often because uncore_pci_exit.part.22 lacks a __init
>> annotation or the annotation of uncore_free_pcibus_map is wrong.
>
> Hi,
>
> I can't reproduce this section mismatch. Could you please send me your .config?

Attached.

> Which gcc version did you use?

gcc (Ubuntu 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609

> I used this tree: git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git initify-v4

Yup, that's what I was building from.

-Kees

-- 
Kees Cook
Nexus Security

Download attachment ".config.gz" of type "application/gzip" (28007 bytes)